Operation & Maintenance Guide
Contents
1. A quiasse jurof suan ur pasn oq JSNUI 348 WZIS VHd AUCH JSNUI IM 997 1808445 9 pue 6LOVAAS 10 71807446 107 8 6LOPAAS popoou aie AToyeurxoiddy 1911048 uorsuouip o qrssod Fue 18ssooou 1J9 10 1481 0928 ApInjodeo Sunsodsuen 9 pue UONISOd 55 10 A quiesse xoouoow 6 FW 18 uonisodor juororgnsur seu eppinquang 55918 JNOYIIM se pUNOIS WIM q epponquan jsnfpy 51 UMI semje 0 SMOTTL UOT ISOd sy I dop Sunn poursop urene sjaaym ysnfpe pue uonrsod pue 2 Jo ooe d owes yoene pasn 0 sr roepui Ao p pesop 1epur Ao orneap u uruauA 9 UMOUS S BMPEOI 18 10 posed uo se A qeuoseoi SI A quiasse jurof nun 9184 jo jsn py c JOU p nous 8141 MOLLY SIP Iers sope q uo SUTTTOI pare Surdooso o uoneoriqn A quuesse jurof 329uu0 poxiodsued jou sr 42. NOLLISOd LIANN 00 A0 ON 9 40 WAINAD NO SILTAA ONINNOU NAHM VAN MOA SLNN HS 1109 45 INGIA ISAf V LTA8 NI 3AV3HS ISIMOO T YALNNOD NO JSIMW201 4 ie E Q3 MOTTY SI JINAN ALS 340A Iz T 4 ELS Rest E AWMTIOd NO UALNAD SETAS TLINN MOA ALVLOU AN V LIOS INANLSNFEAV NASOOT HALON AM OA ALVLOU OL UAAUO NI N3SOOT VAY JUrpe IPY 11089 INAWLSA MY T104 DNI 45 UTTTLL LSUMHIHON O amp M Operation amp Maintenance To the Purchaser This Manual contains valuable information about your NORTHWEST ROTARY TILLER In this Manual you will find instructions and helpful suggestions for operating attaching adjusting and assembling your new Rotary Tiller Keep this Manual in a convenient place for quick and easy reference Use it as a guide whenever questions arise You have purchased a dependable sturdy machine but only by proper care and operation can you expect to receive the service and long life designed and built into it We have endeavored to build a Rotary Tiller with the strength and durability to fit present day larger tractors and modern farming practices At the same time we have tried to eliminate excessive weight to allow its use integrally hitched to most tractors In any powered ground working implement such as thi
3. O amp M 7 O amp M Operation amp Maintenance Sheave Belt amp Idler Post Chart Sheave Diameters 15 Center of Drive Shaft to L H End of Frame A Idler Post 540 PTO RPM 1000 PTO RPM No Belts No Belts 5 B A A D 108 C 108 C 108 C 108 C 120 120 120 120 120 120 07 98 Northwest Tiller Inc O amp M 8 O amp M Operation amp Maintenance Sheave Belt amp Idler Post Chart Idler Post 540 PTO RPM 1000 PTO RPM Sheave Diameters Center of Drive No Belts No Belts Shaft to L H End 12 of Frame A i 5 132 C 132 C 132 C 132 C 132 144 C 144 C 144 C 144 C 156 C 156 C 156 e a lt lt lt lt lt lt lt lt lt lt 168 O 168 168 C 168 C 168 C 168 C lt lt 168 C 180 C 180 192 C 192 C 10 15 12 15 10 15 12 15 204 C 10 12 204 C 10 15 204 C 12 15 12 15 12 15 216 216 228 228 4 240 C 07 98 Northwest Tiller Inc O amp M 9 O amp M Operation amp Maintenance Vineyard Sheave Belt amp Idler Post Chart Idler Post 540 PTO RPM 1000 PTO RPM
4. Sheave Diameters Center of Drive No Belts No Belts Shaft to L H End 12 of Frame A tri nla 07 98 Northwest Tiller Inc O amp M 10 O amp M Operation amp Maintenance Sheave Combinations To change DRIVE or B would move to the DRIVEN sheave RIGHT approx To change 3 4 To change 3 3 4 To change 5 To change T8 To change 2 1 2 T change 12 Note If larger sheaves are substituted for smaller sizes B would move to the left L H End Tiller Frame 07 98 Northwest Tiller Inc O amp M 11 O amp M Operation amp Maintenance Sheave Combinations Proper Motor Speed In most conditions operate motor to give full 540 or 1000 RPM at tractor PTO If speed is reduced particularly from overload excessive belt slippage and pulsation will result Before lifting tiller at end of field it is best to either reduce motor speed or disengage tractor PTO The integral hitch linkage on most tractors tends to raise the tiller in an arc instead of a level position thereby causing considerably more angle to the front of the tractor PTO universal joint than to the rear of the tiller joint This creates excessive vibration at full motor speed Tractor Ground Speed To determine the best ground speed to use start tractor in low gear then try second etc See below NOTE It will t
5. Operation amp Maintenance Rotor amp Blade Assembly For Saber and Stub Blades See pages 3 amp 3 1 for Regular Flat Blades 5 lt pe 5 Figure 1 1 Starting with the L H Rotor Assembly A Figure 1 with blades assembled as in figure 2 place a 2 Blade Rotor Half in position on top of shaft hub of rotor to right and face of blade approximately 5 from inside of housing end Insert 3 4 carriage bolts with heads up and attach 4 Blade Rotor Half with hub to right as shown Tighten in place 2 Rotate shaft 1 4 turn backward top blades toward you Again place a 2 Blade rotor Half into position B Figure 1 with hub to your right NOTE Rotor Assemblies except have blades assembled as in figure 3 Place 3 4 carriage bolts as above Attach 4 Blade Rotor Half but with hub to your left See Figure 3 Fasten in place with c c of blades on the 2 Blade Rotor Halves approximately 7 3 Again rotate rotor shaft 1 4 turn backwards Place 2 Blade Rotor Half into position C Complete assembly exactly as in 2 except space 2 Blade Rotor Halves at 12 c c of blades 4 ForD E amp F repeat 3 except fasten last assembly with face of blade approximately 5 from inside of housing Remember Rotor Assembly A is arranged as in figure 2 All other rotors have the same blade arrangement as in Figure 3 Always measure spacing of only the 2 Blade Rotor Halves For wider Tillers proceed as above with addit
6. 98 Northwest Tiller Inc Maintenance 7 Maintenance Belt Replacement RB amp D Tiller Belt 8 Remove Belts and Idler Assembly Belt 9 Dis Assemble the Idler Assembly Fold Back Lock Tabs Remove Nuts Belt 118 Remove Lock Tab Strip 10 98 Northwest Tiller Inc Maintenance 8 Maintenance Belt Replacement RB amp D Tiller Belt 12 Remove Guard Cut holding wire on rear bolts and remove the bolts Remove Grooved Idler Remove Flat Idler 10 98 Northwest Tiller Inc Maintenance 9 Maintenance Belt Replacement RB amp D Tiller Belt 16 Check Grooved Idler For Wear Used When worn the ridges become sharp and will cut the belts New Ridges are about 1 8 thick Check Flat Idler For Wear Used May force belts to track improperly New Smooth no grooves Remount Grooved Idler Make sure all belt numbers are the same Different numbers mean different lengths and all belts must be the same length 10 98 Northwest Tiller Inc Maintenance 10 Maintenance Belt Replacement RB amp D Tiller Belt 21 Belt 23 10 98 Put New Belts On Idler Assembly Remount Flat Idler Remount Guard Set Idlers so guard will fit over bolt ends Remount Lock Tab Northwest Tiller Inc Maintenance 1 1 Maintenance Belt Replacement RB amp D Tiller Belt 24 Remount Nuts End of shaft will be nearly flush wi
7. O amp M 2 Northwest Tiller Inc O amp M Operation amp Maintenance Rotor amp Blade Assembly For Regular flat blades See pages 3 2 amp 3 3 for Saber or Stub Blades Figure 1 For convenience a 6 Rotary Tiller is shown above but instructions apply to other width Tillers except demension B which can be found on chart at end of instructions This arrangement applies to Rotors R 50 RB 42 44 RB 62 64 D 150 and all welded rotors Should it be necessary to re assemble rotors and blades the following instructions should be carefully followed to avoid confusion in attempting to achieve the proper blade and rotor spiral We suggest that the Tiller be tipped on its face with the mast forward for easy handling 1 Starting at the end and working from the rear of the Tiller place 2 Blade Rotor Half in position on top of rotor shaft with hub pointing to left See 1 Figure 1 Attach 4 Blade Rotor Half in position on under side of 3 4 carriage bolts placed down through the upper half Tighten into place with vertical center of blade approx 7 from inner face of housing See Figure 1 NOTE R 50 amp D 150 Rotor Halves are identical but the reference bolts are placed downward as above We should remind you to always place bolts downward through each upper Rotor Half for easy checking of relative Rotor position 2 Rotate shaft 1 4 turn forward top edge of Rotor or Blade woudl turn away from you and repeat instru
8. assembled as in Figure 2 Hub of rotor to the right Insert 3 4 carriage bolts with hands up and attach 2 Blade Rotor Half RB 42 as shown in figure 1 Tighten into place 12 from center to center of first rotor see above 3 Again rotate rotor shaft 1 4 turn backward and place 4 Blade Rotor Half RB 44 in the same maner as 1 blades included NOTE Space this rotor and all succeeding rotors 12 center to center 4 Repeatthis sequence until rotors are all mounted The last rotor should mount approximately 6 from the RH end plate the hub of the last rotor must be reversed to the left NOTE rotors and blades are mounted as shown in figure 2 except the last rotor The blades are mounted the same on the last rotor but the hub is reversed as explained in 4 RH and LH blades are insignificant as lont as the blades are mounted opposite each other as shown in figure 2 Blades are not stamped RH or LH Always measure center to center of rotor halves on same side of shaft Blades may be either assembled in rotors in advance or after rotors are in position as described Northwest Tiller Inc O amp M 3 4 O amp M Operation amp Maintenance O0 1940 uo Od eseSuesiq ALON IFUL pue 12 00 sj red po910J JI soul 9ALID AUB JOUOY JOUUEI 94 99S oSeurep snoras pue 4 998
9. bottoms 32 1 2 overall nor extends beyond 43 overall The driveline fits together so that the yokes on the center sections are always in line Should the assembly ever be changed or damaged always check to be sure that this alignment is retained since out of alignment will cause pulsating of the drive line Stabilizer bars on the tractor hitch are desirable Always adjust top link so tiller frame is level when in working position When first attaching to tractor lift tiller carefully to determine that 1 PTO Universal Assembly does not strike frame 2 telescoping shaft does not bottom If either occurs hydraulic lift adjustment on tractor must be set to reduce height of lift To prevent damage to Gauge Wheels Aprons and Blades be sure tractor hydraulic lift is set to drop slowly When first operating tiller it is best to set the Gauge Wheels for shallower work than will be desired to allow for short breaking in period To best determine depth of cut stop tractor but allow tiller to operated for a few moments then raise and drive ahead A clean furrow will appear which may then be accurately measured Northwest Tiller Inc O amp M iii O amp M Operation amp Maintenance Assembly Bulletin No 401 Assembled view of Northwest Rotary Tiller with Mesh Roller Use Spring Position A for best down pressure on Full Width Aprons Use Spring Position B for hte Narrow Crop Aprons Northwest Till
10. etc as well as tractor drive from shock and overloads When in proper adjustment belts will not slip except when overloaded Do not over tighten Belt Adjustment NOTE Do NOT use these spring bolt nuts for any TRASS f adjustment They must always be positioned at full depth 1110011 as shown Adjust drive sheave assembly by tensioning E E ood screw for all belt tension adjustment LET AENEA TJ When starting a new tiller or tiller with a new set of replacement belts the belt tension should be increased by several turns of the belt tension adjuster to allow for stretch and break in See above paragraph Re check the belt tension indicator approximately every 10 to 15 minutes of tilling This is especially important on wider tillers with the longer belts which may stretch under load becoming too loose or may turn over This may result in damaged belts After two or three adjustments belts are usually stretched to proper working length When replacing belts the need not all have the same code numbers See Chart Below Belt Numbers Matching Limit 81 to 150 use upto 2 Code Numbers 151 to 285 use up to 3 Code Numbers Code numbers must be consecutive The longer codes representing the majority of belts in the set The Idler System as used on the Northwest Rotary Tiller tends to keep a uniform fit around the sheaves even though belts tend to be somewhat different lengths If a sin
11. 40 Or use a good quality Grade 5 oil 85w 140 Keep top torque tube bearing reservoir filled with grease as it is the only means of lubricant to this bearing A Hold finger with pressure in on breater while filling reservoir until grease appears Keep pinion nut snugged up to prevent hammering of bearings Torque setting of pinion nut is 180 inch pounds Check daily in your preventive maintenance program Watch for oil leaks or moisture around gear case and main rotor shaft Always be aware of different or strange noises Change oil as needed A If gear case becomes extremely heated which may break down oil B When color of oil becomes black or smells burnt We recommend gear case cooler on machines that run excessively hot due to A Depth of tiller being run B Speeds of tiller C Amount of horse power D conditions Recommended Seasonal inspection of torque tube bearings A Watch for wash boarding or unusual wear patterns on bearing or cone Pinion Nut Torque 180 inch Lbs Check Daily TB Grease Breather Vent Grease Zirk Hold Pressure down while pumping grease When filled Grease will appear here or Gear Case Vent Oil Fill Spout Fill to Mark on Dip Stick Keep Wedge Nuts Tight Northwest Tiller Inc Maintenance 1 Maintenance Northwest Tiller Lube Program Please take a few minutes to get to know your machine by reading your owner s manual The information is valuable and will help your tiller last longe
12. BELTS MUST BE PROPERLY ADJUSTED FOR BEST PERFORMANCE NOTE DO NOT use these spring bolt nuts for any adjustment They must always be positioned at full depth as shown Adjust drive sheave assembly by tensioning screw for all belt tension adjustment Belt Installation Tensioning Check the tension of the belts according to the following steps Step 1 100 feet Adjust tensioner Step 2 100 feet Re adjust tensioner Step 3 200 feet Re adjust tensioner Step 4 400 feet Re adjust tensioner Step 5 After first hour of running time Use Belt Tension Adjuster Only Check tension periodically Adjust as needed When starting a new tiller or tiller with a new set of replacement belts the belt tension should be increased by several turns of the belt tension adjuster to allow for stretch and break in Thebeltsthat we supply with each unitare manufactured with multilayered reinforced cord designed totakethe twist and wrap around the pulley to provide maximum shiv contact Other off the shelf brands have a cord structure with only a few large diameter reinforced cords that simply will not do the job Northwest Tiller belts feature smaller and more numerous cords for better performance and longevity NORTHWEST TILLERS WILL NOT Nurthvaest Bolt Off the Shulf Belt GUARANTEE THE PERFORMANCE OF YOUR TILLER IF BELTS OTHER THAN OURS ARE USED vo E Mgr am ATA 7 A002
13. I2 15 DD J 216 18 4 C 75 12 216 187 8 C 270 C 75 15 15 204 17 4 C 255 12 15 DD H 204 17 4 255 12 15 DD J 204 177 5 C 75 15 15 192 16 4 C 240 12 15 DD H 192 16 240 12 15 DD J 192 167 5 C 75 15 180 157 4 240 RH Side 12 15 DD H 180 15 4 C 225 LH Side 12 15 DD J 180 15 5 C 75 15 15 168 147 4 210 12 15 DD H 168 147 4 210 12 15 DD J 168 147 5 C 75 15 15 1988 amp earlier models use C 60 belts 12 Driven amp 12 Drive 07 98 Northwest Tiller Inc O amp M 17 1 O amp M Operation amp Maintenance Belts dual drive Tillers 6 Belt Drive System No Size Post Length Used LH RH Driven Drive LH RH 240 207 6 RT 3285 RT 3297 RB2615 RB2612 RB 123 1 101 228 197 6 RT 3270 RT 3285 RB2615 RB2612 RB 123 1 101 216 187 6 RT 3255 RT 3285 RB2615 RB2612 RB 123 1 101 204 17 6 RT 3250 RT 3270 RB2615 RB2612 RB 123 1 101 192 167 6 RT 3240 RT 3255 RB2615 RB2612 RB 123 L 101 180 15 6 RT 3225 RT 3250 RB2615 RB2612 RB 123 1 101 168 14 6 RT 3210 RT 3235 RB2615 RB2612 RB 123 1 101 156 13 6 RT 3195 RT 3210 RB2615 RB2612 RB 123 1 101 144 12 6 RT 3180 RT 3195 RB2615 RB2612 RB 123 1 101 08 98 Northwest Tiller Inc O amp M 17 2 Maintenance Northwest Tiller D Series Gear Case Lube and Maintenance E 10 98 underneath side of belt sheeve Recommended gear case oil is Texas Refinery Company 4890 Gear Lube 85w 1
14. JT 7 eq 107291 0 YOITY JoouUOD 1 UMOUYS se UONISOd 19juoo pjnous yeys 91 st g uorsuourp 101291 JJ UONISOd oq p nous 19 uo Surmoq eys ATayeutxoidde st g uorsuourp 20 2 1 81 208 Suruiojoq IFUL 8 19 9219 v 10 1807445 UO OZ 29 6LOVANS 61 01 81 01 dn 510 JJ uoi 10321 Sunooeuuoo a10Joq q 272948 Qd 100081 Jo puo pue JO 191492 91 JO umuiruru JSNUI YOY pue u994 9q SI pousrug Apquiosse eje duroo ay 0 peuoene 0j SI jurof pes1oA Tun JO uonoes j eu euo paddrys 1907 TAS pue 6 0 145 SUL If 7914 v 1802 10 6 0 9 9E yw puojxo JO 4 01 3jeus Surdooso o OG SULIvAG Jo oov IVI Ie 07 SuLreag 1199 9 1807445 9 519111 6 07446 104 5 957 A quiross v O amp M 4 Northwest Tiller Inc O amp M Operation amp Maintenance Adjustment And Care of Belt Drive A belt drive was chosen for this Rotary Tiller as the simplest and safest means to protect tiller blades gears
15. ake more horsepower at the higher ground speeds to produce a somewhat courser tilth If a finer tilth is desired at the faster ground speed a smaller driven sheave on the 540 RPM drive or a larger driving sheave on the 1000 RPM drive will be required For fine seed beds it may be desireable to use top speeds at slower ground speeds PROPER SIZE SHEAVES FOR DIFFERENT BLADE ROTOR SPEEDS Drive Driven Produces Approx Recommended Max Sheave Sheave RPM of Blade Ground Speed for Size Size Rotor Shaft Average Tilling On Standard Drive Tillers used with 540 RPM PTO Speed A amp Drive Standard 12 10 174 2 MPH Max 12 12 152 1 1 2 MPH Max 15 12 190 2 1 4 MPH Max 15 10 228 3 MPH Max On Standard Drive Tillers used with 1000 RPM PTO Speed B Drive Standard 10 12 235 3 MPH Max 12 12 282 4 MPH Max 12 10 346 5 MPH Max Heavy Duty Drive used with 540 RPM PTO Speed C Drive 155 15 144 1 1 2 MPH Max Standard 15 12 181 2 1 2 MPH Max 15 10 218 3 1 4 MPH Max Heavy Duty Drive used with 1000 RPM PTO Speed C Drive 10 15 192 2 3 4 MPH Max Standard 12 15 231 3 1 4 MPH Max 15 15 289 4 MPH Max 15 12 360 5 MPH Max Extra Heavy Duty Drive 1000 RPM PTO Speed D Drive 6 Belt 10 15 160 2 MPH Max Standard 12 15 190 2 1 4 MPH Max 15 15 238 3 MPH Max 15 12 298 4 MPH Max 15 10 357 5 MPH Max On larger tractors the 1000 RPM PTO Speed is recommended if tractor is so e
16. ction 1 except to locate per dimension shown in Figure 3 Forthe remaining Rotors repeat instruction 2 that is turn Rotor Shaft ahead 1 4 turn and secure as described On all other width Tillers these center Rotors are spaced as above 4 Forthe last Rotor repeat instructions 2 and 3 except face the hub to right away from the housing setting blade face approximately 7 from inner face of housing It is best to strike rotor bolt heads with a heavy hammer and re tighten securely in all rotors to avoid loosened bolts See 5 for change in blade arrangement for this Rotor Northwest Tiller Inc O amp M 3 O amp M Operation amp Maintenance Rotor amp Blade Assembly Continued 5 Blades may either be assembled in rotors in advance or after rotors are placed as above Remember that blades are attached to ALL rotors in the same position and sequence except the last rotor installed or the L H end rotor with hub of rotor facing you as in picture See figure 2 Place a R H blade in position 1 a L H blade in position 2 a R H blade in position 3 etc On the last rotor or the left end rotor simply reverse this procedure Place a L H blade in position 1 a R H blade in position 2 a L H blade in position 3 etc This assembly should give a spiral as shown Figure 2 Remember ALL rotor blade assemblies should appear alike as shown in figure 2 EXCEPT L H rotor Northwest Tiller Inc O amp M 3 1 O amp M
17. e 4 Blade Rotor Half RB 44 C in the same maner as in 1 blades included NOTE Space this rotor and all succeeding rotors 9 1 2 center to center 4 Repeat 2 for D Repeat this sequence until rotors are all mounted The last rotor should mount approximately 3 1 4 from the RH end plate NOTE rotors and blades in A C etc are mounted as in Figure 2 rotors and blades in B D etc are mounted as in Figure 3 Always measure center to center of rotor halves on same side of shaft Blades may be either assembled in rotors in advance or after rotors are in position as described NOTE RH amp LH blades are insignificant as long as blades in Figure 2 are mounted opposite blades in Figure 3 Blades are not stamped for RH or LH Northwest Tiller Inc O amp M 3 3 O amp M Operation amp Maintenance Spike Rotor amp Blade Assembly Fig re 1 All rotors are mounted in this manner from left to right 1 Starting with the L H Rotor Assembly above with blades assembled as in figure 2 place a 4 Blade Rotor Half RB 44 in position on top of the shaft hub of rotor to the right Position center of rotor approximately 6 from inside of housing end Insert 3 4 carriage bolts with heads up and attach 2 Blade Rotor Half RB 42 as shown in figure 1 Tighten into place 2 Rotate shaft 1 4 turn backward top blade toward you and position 4 Blade Rotor Half RB 44 B with blades
18. ed cords Northwest Tiller Belts feature smaller and more numerous cords for better performance and longevity They are designed to take the twist and wrap around the pulley to provide maximum contact Tighten Spring Bolts till they bottom on the tack weld shown in Belt 31 Make sure they are tightened evenly so one side does not get pulled up higher than the other Back off each nut 1 2 turn Your springs are now set 10 98 Northwest Tiller Inc Maintenance 14 Maintenance Belt Replacement RB amp D Tiller Belt 36E Tension Belts using belt tensioner Belt 37 Testing Tension There should be about 1 4 to 1 2 deflection Lock Down Jam Nut on Tension rod Remount Center Drive Guard Hook the lip of the center drive guard over the lip of the guard strap so the center drive guard is held in position 10 98 Northwest Tiller Inc Maintenance 15 Maintenance Belt Replacement RB amp D Tiller 40 Replace the bolts on Center Drive Guard Remount Sheave Guard underneath the idler yoke Place the corner bolts so they are facing inside This will prevent them from catching on trees shrubs clothing etc The other bolts may be mounted however you prefer On Smaller Gearcases there will be 5 bolts On Larger Gearcases there will be 6 bolts Checking Belt Ride Run tiller raise so blades are clear of ground Belts should Track on centers of grooved Idler As they
19. enter of the rotor shaft See fig A 4 Grip drive belt by hand and rotate rotor shaft forward until dial indicator is at highest point 5 Use torch with large tip to heat to yellowish red a strip between the first and second rotor See fig B Heat between frame and first rotor as a last resort only This should be a small spot across the front face of the rotor shaft or across the corners Allow to cool and if necessary heat another spot 1 1 2 to 2 away and recheck Repeat until dial indicator shows approximately 005 and 010 difference since this may be accepted as normal with no service problem resulting fig B Note Northwest Tiller suggests the use of propane gas to heat shaft up Propane Gas burns hotter and is less dangerous than other fuels The heat should be hot and fast with as small a spot as possible to achieve the best results See fig C On the flat the heated spot should be about the size and shape of a silver dollar See fig D On the corner it should be diamond shaped about 2 long and 1 deep See fig E fig C fig D The Flat fig E The Corner LO 07 98 Northwest Tiller Inc O amp M 13 O amp M Operation amp Maintenance Center Bearing INSTRUCTIONS FOR ALIGNMENT With full sag in the rotor shaft E push bearing housing to a forward and up position and insert bolts at C and D not necessarily on the holes shown in print and tighten in place Do not force bearing up I
20. er Inc Assembled View of Northwest Rotary Tiller with Mesh Roller showing proper location of Apron Hold Down and Mesh Roller Clamps attached to the Rear Bar Support O amp M 1 O amp M Operation amp Maintenance Model RB Tiller Bedder Assembled View Assembly Bulletin No 403 Use Spring Position A for best down pressure on full width Aprons Use Position B for the Narrow Crop Aprons Northwest Tiller Inc Factory does not furnish the furrower Any standard wing type or flat furrower may be attached When used with tractors with insufficient lift and transport stability the RB 4088 or RB 4089 Hydraulic Lift Assist gauge wheels may be added For narrow bottom furrows up to 9 use RB 4098 gauge wheels For wider furrow bottoms use either RB 4070 or RB 4099 gauge wheels O amp M 1 1 O amp M Operation amp Maintenance 5101021 e ljold MOT 10 Jo depy pue UoISUeIX3 UH 8 95 18940 payoune 281 put umod jo uon US9JAL 10 S 99AA oguen qm JOE prepuvis SIS3MYNON JO MIA po quioss v 290024 Burmoys 51 doi JI 101981 MO Ui esf E suoidy 8 VONSOd esp suo1dy einsseJd UMOD 1584 19 91155914 Buuds esf
21. er drive guard by removing the four bolts on front side and slide guard to remove Remove the Bolts from the gear case guard Release the tension on the belts by loosening the nut and backing it off Then loosen the tension rod Move the center drive assembly by sliding it over toward the gear case Remove the spring bolts and nuts from the idler unit If the machine has slap idlers remove the front bolt holding guards and grooved idler com pletely Loosen rear bolt until there is enough room for belts to slide out If it is a new style remove cotter pin in rear and remove the roll The complete belt system can now be removed If possible place idler unit into a bench vise Dissassemble idler unit by bending back lock tabs and remove the outer nuts Remove lock tab and guard Cut wire on the opposite side loosen grooved idler bolt Remove the bold from flat idler and remove flat idler from unit Check condition of the grooved and flat idler Replace belts and remount flat idler Replace the rear bolt finger tight Replace the guard and lock tab Replace the idler nuts and tighten down be sure that they go into holes in the guard as they are should nuts Tighten both nuts and bend over lock tabs Tighten rear bolts and replace the wire between them Replace idler unit onto the tiller Replace springs and bolts that hold unit to the tiller Place the belts onto the sheaves and reverse the procedure from removing them from the
22. f holes do not match use next lower position Since when tilling the rotor shaft tends to stay in the down or sagging position and has a tendency to crawl ahead in its effort to push the tractor the location of the bearing as suggested should prevent excessive wear on the bearing Tighten bearing sleeve to shaft after properly centering it with the outer hub Do not over tighten as breakage may occur We further suggest that if excessive wear should appear in any direction a re positioning of the flange B in upper support should be done This bearing is used not to hold the shaft in a normal position but to contain it in as near its natural working position as possible to prevent whipping which otherwise might occur The 3 8 clearance in these bearings is necessary to allow maximum freedom of shaft and as a result slight knocking may occur which is harmless 07 98 Northwest Tiller Inc O amp M 14 O amp M Operation amp Maintenance Center Bearing Adjustment If wear point is here loosen If wear point is here loosen the adjustment bolt 4 to the adjustment bolt 4 to move outer housing assembly move outer housing assembly up and toward the front up and toward the back FRONT OF TILLER 4 If wear point is here loosen If wear point is here loosen the adjustment bolt 4 to the adjustment bolt 4 to move outer housing assembly move outer housing assembly down and toward the front dow
23. gle belt becomes badly damaged it should be cut away or it may damage the balance of the set by breaking and becoming tangled between the belts and the idler assembly The tiller may be operated with one less belt than a full set UNLESS the tiller is operating to full capacity However it should no be necessary to intall a complete new set should one or more belts become damaged In line with the above information on matched belts simply add the necessary replacement either new or used and tighten to proper setting 07 98 Northwest Tiller Inc O amp M 5 O amp M Operation amp Maintenance V Belt Drive Trouble Shooting Checklist PROBLEM CAUSE CORRECTION Belts slip e Belts squeal e Rapid belt wear e Belts turn over e Belt Breaks Insufficient tension Overloaded tractor motor Insufficient tension Overloaded tractor motor Excessive slippage Worn idlers amp sheaves Belts turning over and so operated Idler out of proper position because of improper post or bent or broken post bracket Belt damage during installation Improper tension particularly when encountering shock loads Rusty sheave grooves and or sticky cover on new belts Tiller not level with tractor causing excessive vibration of Tiller drive Backing Tiller with blades touching ground Shock or heavy starting loads Belt damaged during installation Foreign objects in drive Check tension setting Reduce tiller w
24. ional Rotor assemblies Blade Assembly Blades may either be assembled in rotors in advance or after rotors are positioned as described Blades for posi tion are assembled as in Figure 2 with L H blade at 1 blade at 2 a L H blade at 3 etc All other Rotor Assemblies have blades assembled as in Figure 3 with a L H blade in position 1 a R H blade at 2 etc Northwest Tiller Inc O amp M 3 2 O amp M Operation amp Maintenance Spike Rotor amp Blade Assembly AN C DN Dea Er EL SR A aA Figure 1 E 5 rotors mounted in this manner from left to right E 3 1 4 bu 1 2 ER 9 1 27 912 ml TYP 1 Starting with the L H Rotor Assembly A with blades assembled as in figure 2 place a 4 Blade Rotor Half RB 44 in position on top of the shaft hub of rotor to right and center of rotor approximately 3 1 4 from inside of housing end Insert 3 4 carriage bolts with heads up and attach 2 Blade Rotor Half RB 42 as shown in figure 1 Tighten into place 2 Rotate shaft 1 2 turn backward top blade toward you and position 4 Blade Rotor Half RB 44 B with blades assembled as in Figure 3 Hub of rotor to the left Insert 3 4 carriage bolts with hands up and attach 2 Blade Rotor Half RB 42 OPPOSITE as shown in figure 1 Tighten into place 9 1 4 center to center of first Rotor 3 Again rotate rotor shaft 1 2 turn backward and plac
25. ma chine Replace the guards Tighten the spring bolt nuts until they bottom out Re tension belts and see manual for belt break in procedure Pages O amp M 5 6 A Video on Belt Replacement is Available Upon Request Northwest Tiller Inc Maintenance 5 Maintenance Belt Replacement RB amp D Tiller Suggested Tool List 1 2 Drive Ratchet 1 2 Drive 10 Extension 9 16 Shallow 1 2 Drive Socket 5 8 Shallow 1 2 Drive Socket 3 4 Shallow 1 2 Drive Socket 15 16 Shallow 1 2 Drive Socket 1 2 Combination Box Open End Wrench 11 8 Combination Box Open End Wrench Wire Cutters Screw Driver Flat Head 5 8 Cold Chisel 5 Prybar 7 8 Deep Socket 1 2 Drive 15 16 Deep Socket 1 2 Drive 1 2 Drive 1 2 Shallow Socket 4lb Hammer Remove the Center Drive Guard Remove bolts 4 on front side Slide from guard strap on back of tub See Center Drive exploded drawing on page 1 10 98 Northwest Tiller Inc Maintenance 6 Maintenance Belt Replacement RB amp D Tiller Remove Gear Case Sheave Guard There will be 5 or 6 bolts depending on the size of the gear case Smaller units have only 5 bolts Release the tension on the belts by loosening the jam nut and backing it off Then loosen the tension rod Tension Rod Jam Nut Belt 6 Move the Center Drive Assembly by sliding it over towards the gear case thus loosening belt tension Belt 7 Remove Spring Bolts and Nuts 10
26. may result DO NOT REVERSE TRACTOR WITH TILLER BLADES TOUCHING GROUND OR LOADING RAMP DAMAGED BELTS MAY RESULT 07 98 Northwest Tiller Inc O amp M Operation amp Maintenance Trouble Shooting PROBLEM CAUSE CORRECTION Tiller runs unevenly and e Cutting edge of blade reversed See page 3 seems to jump forward and Blades in line instead of in spiral See page 3 up and down e PTO Universal Joints out of line See page 4 e PTO Universal Joints not operating at same See page 4 NOTE angle Tractor traveling too fast over ground for speed of rotor which causes blades to take too large a bite Reduce tractor speed over ground but keep up motor speed by shifting to lower gear Change V Belt sheave See page 8 In most heavier soils it is not possible to use tractor with free wheeling type of transmission unless it is equipped with a selection of speed gears that bypass the free wheeling action since the tiller is usually pushing the tractor and if not held back to the proper ground speed too large bite of the blades results Tiller works to desired depth but does not cut off all weeds etc Requires too much power Tiller tends to crab to right or left Tractor is rolled or pushed ahead when Tiller touches the ground Tiller will not properly penetrate soil Belts slipping though properly adjusted 07 98 Too fast ground speed or not proper size V Belt
27. n and toward the back 07 98 Northwest Tiller Inc O amp M 14 1 O amp M Operation amp Maintenance Northwest Torque Tubes for all Gear Cases 8 9 2 d 8 6 5 7 v 3 4 2 1 7 Z 77 B 10 11 15 12 IMPORTANT The preload on item number 4 shown above is set at the factory However it is very important to periodi cally check the preload on item 4 and retighten as necessary to maintain preload on bearings in torque tube Tightening is necessary when item number 4 can be moved by turning Set Preload to 180 inch pounds 07 98 Northwest Tiller Inc O amp M 14 2 O amp M Operation amp Maintenance Relative Position of Offset Northwest Tillers to Center Line of Tractor CENTER LIME OF TRACTOR g IG TILLER BI VEELTS 8 TILLER 128 V BELTS 07 98 Northwest Tiller Inc O amp M 15 O amp M Operation amp Maintenance Dual Drive D Tiller Belt Adjustment Procedure A belt drive was chosen for this Rotary Tiller as the simplest and safest means to protect tiller blades gears etc as well as tractor drive from shock and overloads When in proper adjustment belts will not slip except when overloaded Do not over tighten Belt Adjustment NOTE Do NOT use these spring bolt nuts for any ket FU Hi FRP adjustment They must always be positioned at full de
28. orking depth See above Some slippage is natural in heavy rough or rocky soils This is no problem as long as belts do not become overheated Check for proper tension Do not overload Keep tractor to full recommended speed Check chart for proper post Do not re weld a broken post bracket as it cannot be held to its proper shape Check for proper tension Roll belt or belts back into proper position and over tighten belts to restretch After afew hours operation readjust to proper tension See Adjustement and Care Page 5 If this extra tension does not prevent belts turning over reverse position in groove that is revers ends or vertical positions Check Tiller Assembly Check sheaves for bent flange or excessive eccentricity Level Tiller Apply proper tension Install new belts properly Keep shrouds in place Never use belt dressing When installing new belts do not force or pry belts over sheaves Reduce the drive center distance If one belt is tighter or looser on top than balance when first intalled you will finde that it will be the opposite on the bottom As soon as it has been operated a few moments the tension will be equalized WARNING Thru improper adjustment or severe overload the belt sheaves may get overheated due to excess slippage When this occurs do not stop tiller drive Simply stop tractor travel and keep PTO engaged while allowing the belts and sheaves to cool down or charring of belts
29. pth E d as shown Adjust drive sheave assembly by tensioning M UM PAG LEER screw for all belt tension adjustment At UL When starting a new tiller or tiller with a new set of replacement belts the belt tension should be increased by several turns of the belt tension adjuster to allow for stretch and break in See above paragraph Re check the belt tension indicator approximately every 10 to 15 minutes of tilling This is especially important on wider tillers with the longer belts which may stretch under load becoming too loose or may turn over This may result in damaged belts After two or three adjustments belts are usually stretched to proper working length Prior to 1991 1 Loosen stabilizer arm at C 2 Adjust RIGHT HAND belts to match indicator instructions same as step 1 3 Adjust SHORT belts at D see below 4 Retighten stabilizer arm which was loosened in step 1 5 Check both right hand belt stabilizer idlers to insure all belts ride evenly and freely in the grooved idlers Adjust if necessary 07 98 Northwest Tiller Inc O amp M 16 O amp M Operation amp Maintenance Belts Dual Drive D Tillers Length No Used Size Driven Drive Post 240 20 4 C 285 12 15 DD H 240 20 4 C 300 12 15 DD J 240 207 5 C 75 15 15 228 197 4 C 270 12 15 DD H 228 19 4 C 285 12 15 DD J 228 197 3 C 75 15 15 216 18 4 255 12 15 DD H 216 18 4 C 270
30. quipped since this greatly increases the efficiency of the V belt drive 07 98 Northwest Tiller Inc O amp M 12 1 O amp M Operation amp Maintenance Blade Depth Variations 07 98 ROTOR amp L BLADE ASSEMBLY 14 a N 6 570 GEAR CASE HVY DUTY GEAR CASE 10 O amp DB GEAR CASE RAD R 9A Inner Position 8 1 4 R 9A Outer Position 9 5 8 R 50 Inner Position 10 R 50 Middle Position 11 1 4 R 50 Outer Position 12 1 2 D 150 Inner Position 11 3 4 D 150 Middle Position 13 A B D E F G H D 150 Outer Position 14 1 4 RB 42 amp 44 or RB 62 amp 64 Standard Position 11 1 2 D 82 amp 84 Standard Position Add 1 7 8 to all dimensions for Saber Blades Note Sabre Blades are mounted only on RB 62 amp RB 64 rotors 14 3 4 Add 1 3 8 to all dimensions for Speed Spike Blades These blades may be mounted on any type rotor NOTE Low profile housing 14 radius maximum High clearance housing 16 1 2 radius maximum Northwest Tiller Inc O amp M 12 2 O amp M Operation amp Maintenance Gear Case Wobble Correction 1 Raise tiller to transport position fig A 2 Stop tractor motor and disengage tractor PTO 3 Place Dial Indicator from endplate to outside of gearcase It is important that the dial indicator is mounted in direct line with the c
31. r Read the decals and learn where lubrication is required how often you will need to lubricate and what kind of lubrication is needed Lubricating Points 1 P T O lubricating points 4hrs 2 places 2 Center Drive Unit 4hrs 2 places 3 Slap Idlers and Idlers 4hrs I place 4 Gear Case Top Bearing 4hrs I place 5 End Bearing 4hrs I place 6 Dual Drive Center Bearing on Rotor Shaft 4hrs 2 places 7 SD5000 Tension Unit Bearings and Shaft 4hrs 4 places 8 Gear Case Oil Level Daily as needed 9 Guage Wheels or Mesh Roller Brackets 4hrs I place L1 Grease Zirk Implement and Tractor L2 Grease will appear here when back bearing is filled full Northwest Tiller Inc Maintenance 2 10 98 Maintenance N orthwest Tiller Lube Program 10 98 Grease Zirk Inside Hole Oil level and filler L3 Grease will appear here when filled Grease will appear here when filled Grease will appear from breather or up under bottom side of belt sheave Gear case air vent tube Grease zirk is inside the hole Northwest Tiller Inc Maintenance 3 Maintenance Northwest Tiller Lube Program L6 EZ L7 Gear case vent Oil level and filler tube 10 98 Northwest Tiller Inc Maintenance 4 Maintenance Belt Replacement RB amp D Tiller Au N o ce 13 14 13 16 17 18 19 20 21 22 23 24 10 98 Remove cent
32. r alterations have been made or when other than Northwest Tiller equipment parts have been used unless authorized in writing by the manufacturer The manufacture reserves the right at any time to make changes in design materials or specifications of its products without therby becoming liable to make similar changes in units manufactured earlier This warranty is in lieu of all other warranties covering Northwest products and no other warranties expressed or implied are made or authorized by the manufacturer NORTHWEST TILLERS INC P O BOX 10932 YAKIMA WASHINGTON 98909 U S A Note For this equipment to be covered by above warranty the factory must have on file all information asked for in postcard attached to inside front page Note All warranty work must be authorized by factory representative Northwest Tiller Inc O amp M ii O amp M Operation amp Maintenance Attaching Tiller to Tractor CHECK DECALS DO NOT BACK UP THE TILLER CAREFULLY when in working position a bent for greasing and Apron or Damage to belts may occur adjustments Tiller fits either 1 or 42 Category tractor hitches with no extra parts The Model B Tiller Hitch connects with either Category 1 or 2 linkage and the PTO Shaft Assembly fits most standard 3 point hitch tractors Before operating in the field it is best to check the PTO shaft length in both the raised and lowered positions on integral hitch tractors so that it neither
33. run over Flat Idler 10 98 Northwest Tiller Inc Maintenance 16 Maintenance Belt Replacement RB amp D Tiller Belt 44 If running high side or low side of Grooved Idler loosen 1 2 Nut on idler post Bump the idler assembly slightly pivoting Idler Assembly right or left to center belts in Grooved Idler Repeat process until belts are running true center of Grooved Idler as they leave Idler Assembly Retighten Post Bolt New belts must be broken in as follows Run tiller 100 feet and re adjust the tension on the belts Adjust tension to 1016 pressure Under pressure they should drop as far as the bottom side of the next belt Recheck running position of Belts leaving Grooved Idler Repeat 5 times Recheck belts every four hours 10 98 Northwest Tiller Inc Maintenance 17 Maintenance End of Season Preventive Maintenance And Storage Proper end of season preventive maintenance and storage ensures longer implement life Off season Care 1 Lubricate all bearings 2 Loosen tension on belts 3 Preventive maintenance steps Check for loose belts amp nuts gearcase pinion nut belts and sheave wear wedge bolts on gearcase center drive bearings PTO universals for oil leaks or moisture spots for worn broken or loose blades or rotors mesh roller brackets and bearings ED ET ELTE 4 Place implement under cover or cover with a tarp Remember your off season is an e
34. s some means must be provided to protect the tractor and implement gear train shafts bearings gears universal joints etc as well as the cutting blades We have found multiple V belt drive incorporating the automatic belt tensioning idler system the sim plest most fool proof and effective answer to this problem With just reasonable care these belts will give long life and still slip or stretch upon the tiller encountering large rocks roots etc thereby protecting both tiller and tractor See Page 5 and 6 Please Fill Out Below For Your Records Serial of this Tiller is RB7934 Model DD HC 168 SC SOD Date purchased 07 98 Northwest Tiller Inc O amp M i O amp M Operation amp Maintenance WARRANTY Northwest Tillers Inc warrants its products to be free of defects in workmanship and material for a period of 90 days from the date of delivery to initial user when given reasonable use under normal conditions This warranty is limited to the repair or replacement as the manufacturer shall elect upon inspection to have been defective in material or workmanship but does not include any installation or transportation costs This warranty shall not apply to any Northwest Tiller equipment or part thereof which has been dam aged in any accident by fire flood or act of God This warranty is likewise not extended to repairs on second hand machines nor to Northwest products on which repairs o
35. sheaves Blades set too far apart e Blades on backwards e Operating too great a depth for size of tractor e Slipping belts Contrary to popular opinion slipping belt uses up more power producing a lower RPM than a tight belt holding the Tiller blade rotor up to proper speed DO NOT TIGHTEN BELTS beyond instructions on Idler Decal This may happen on the wider tillers in offset position on hilside or uneven ground particularly if ground is hard or heavy It must be remembered that the action of the tiller s blades are much like the old spade lugs used on tracter wheels before the advent of the rubber tire If the tractor was held back the lugs dug up or tilled the soil Likewise if the Tiller is not held back it acts like a tractor and travels using the blades for traction e Ground too dry and hard Remember that a tiller has approximately the same resistance to penetrating hard ground as a mouldboard plow e Blades on backwards e Guage Wheels improperly set This may occur if tractor cannot keep up proper speed and starts lugging Northwest Tiller Inc See page 8 12 See page 3 See page 3 Keep guage wheels carrying full load It may be necessary to move Guage Wheels to rear or sides if front mounted See page 5 Have tractor in proper gear slower ground speed or if tires are skidding set Tiller shallower See page 3 Change depth and or ground speed Check for proper sheave size
36. th nut Shoulder of nut seats thru lock tab Secure nuts tightly Belt 25 Tighten Back Bolts Run retaining wire through holes 2 or 3 strands Twist to prevent loosening This keeps the bolts from backing out Re fold Lock Tabs 10 98 Northwest Tiller Inc Maintenance 12 Maintenance Belt Replacement RB amp D Tiller Belt 28 10 98 Make sure there is a slot on the underside of the Idler post Look underneath or remove post to make sure slot is there The slot should go up against the sidewall In some cases you may want to grind a bolt so it will sit flush with the sidewall on older units This slot provides for belt adjustment This is a new feature within the last five years It helps provide better belt adjustment and longer belt life Remount Idler Assembly Spring Bolt Up Northwest Tiller suggests that you insert the upper springbolt before mounting idler assembly to provide something to hold onto This also makes it easier to install Spring Bolt Tack Weld Northwest Tiller Inc Maintenance 13 Maintenance Belt Replacement RB amp D Tiller Belt 32 Spring Bolt Down There are rings on both the top side and the bottom side for the springs to sit in Make sure springs rest in these rings Place Belts On Center Drive Sheave Always use Northwest Belts Other off the shelf brands have a cord structure with only a few large diameter rein forc
37. xcellent time to complete tiller repairs or gearcase repairs Before next season 1 Retension belts and replace oil in gearcase if necessary 10 98 Northwest Tiller Inc Maintenance 18
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