model 34 planetary digger drive service manual
Contents
1. bearing grease to roller contact surface of the inner cup 20D Then press inner bearing cone 20C onto shaft 2 until it seats against inner bearing cup 20D Prior to installation of the shaft seal 16A the preload may result in a rolling torque which varies between 100 to 300 in lb The bearing preload should be tailored to your application a low speed application may reguire a high pre load while high speed applications usually benefit from low pre load Adding shims 40C will increase the pre load on the bearing set De termine your pre load reguirement and install shims to obtain this pre load Install the Load N Lock segments 40E over the shims 40C and into the groove in the shaft 2 The Load N Lock segments should be oriented so the 15 degree angle matches the 15 degree angle groove cut in the shaft and the small detent on the OD of the segments is oriented towards the bearings Finally install the lock ring 40D over the segments 40E The Load N Lock lock ring must be oriented so the smaller outside diameter is oriented towards the bearings the detent groove in the lock ring which matches the detent bead in the Load N Lock segments should be towards the bearings as well Top Case Assembly Teardown Items 3 4 6A 6B 12B 14B 16C 16D 25C 30A 40F 40H 40J 40K 40L 40M 40N 40P and 45 Inspect primary ring gear 12B for abnormal wear or damaged teeth If replacement is required remove twelv2. HIFTER FORK 40M 1 71 005 1751 SHIFT COLLAR ASSEMBLY 40N 1 01 160 0110 RETAINING RING 40P 1 01 160 0040 RETAINING RING 45 1 71 004 0292 SHIFTER SHAFT 50 1 01 304 0940 MOTOR BEARING PRELOAD DETERMINES OUANTITY OF SHIMS X34L REV A 03 06 14 HWP SEAL KIT PN 34 016 2011 Model 34 service manual SM34L AA Page 1 Eskridge Inc Olathe Ks 913 782 1238 www eskridgeinc com LUBRICATION 8 MAINTENANCE Using the chart below determine an appropriate lubricant viscosity Use only EP extreme pressure or API GL 5 designated lubricants Change the lubricant after the first 50 hours of operation and at 500 hour intervals thereafter The gear drive should be partially disas sembled to inspect gears and bearings at 1000 hour intervals Recommended ambient and operating temperatures for conventional and synthetic gear lubricants 50 25 0 25 50 75 100 125 150 175 200 225 250 F 80W90 conventional 75W90 conventional 85W140 conventional Min Ambient operating temp Max Ambient temp Max Operating temp 75W90 synthetic 80W140 synthetic 45 32 18 4 10 24 38 52 66 79 93 107 121C Note Ambient temperature is the air temperature measured in the immediate vicinity of the gearbox A Gearbox exposed to the direct rays of the sun or other radiant heat sources will operate at higher temperatures and therefore must be given special consideration The max operating temp must not be exceeded under any circumstances regardless of ambient tempe
3. IDGE MODEL 34 PLANETARY DIGGER DRIVE SERVICE MANUAL WARNING While working on this eguipment use safe lifting procedures wear adeguate clothing and wear hearing eye and respiratory protection THIS SERVICE MANUAL IS EFFECTIVE SIN 46968 TO CURRENT NOTE Individual customer specifications mounting DATE 6 28 10 TO CURRENT case output shaft brake assembly etc may vary from VERSION SM34L AA exploded drawing and standard part numbers shown If applicable refer to customer drawing for details a EFFECTIVE FROM SN 120 000 DATE 03 18 14 TO CURRENT MODEL 34BA Parts List GROUP ITEM QTY PART NUMBER DESCRIPTION 1 1 34004 3001 BEARING CARRIER 2 k H OUTPUT SHAFT 2 1 75 004 4022L 2 5 8 HEX OUTPUT SHAFT 2 1 75 004 4012L 3 HEX OUTPUT SHAFT 3 1 34004 1004 CASE STD 2 SPEED 4 1 34 004 1001 SHIFTER GEAR 5 1 25 005 2221 CARRIER ASSY SEC 5A 1 25 004 1472 CARRIER SEC 5B 3 25 004 1853 PLANET GEAR SEC 5C 3 25 004 1432 PLANET PIN SEC 5D 108 01 106 0010 ROLLER 5E 6 25 004 1462 PLANET WASHER 251 SEC 5F 3 01 153 0190 ROLL PIN 5G 3 25 004 1452 SPACER 6 s 1 34 005 2006 SUN GEAR ASSEMBLY 6A 1 34004 1002 SUN GEAR PRIMARY 6B 1 01 127 0010 BUSHING 7 1 25 004 1854 SUN GEAR SEC 8 1 34 005 2001 CARRIER ASSEMB
4. Inability to Shift into High Gear This symptom can be due to a poorly adjusted shift cylinder While the cylinder is carefully set at the factory the process of disassembly may turn or move the cylinder in such a way that it contacts the case contact between the cylinder body and the gear drive prevents the rod from making its full one inch travel Difficult Rough or Impossible Shifting Hand testing a shifter may indicate a no shift condition even when the shifter is okay If metal to metal contact is made a short turn of the output shaft may align shifter and allow shift to occur Diagnosing the Upper Gear Drive Area The Series 34 digger drive cannot be shifted on the fly The digger drive must be at a complete stop with the load removed backed out of hole in ground before shifting Shifting on the fly is the primary cause of damage to the gears in the shifter assembly Damage caused by shifting on the fly will be seen as initial grinding of the gears at the gear faces a wear pattern developing on the top of the cluster gears and on the shift gear itself and a severe wear pattern developing on the points of the shifter gear Additionally the sun gear will show damage on the points a rounding or even severe burring of these parts is possible Model 34 service manual SM34L AA Page 2 Eskridge Inc Olathe Ks 913 782 1238 www eskridgeinc com 10 11 12 13 Unit Teardown Scribe a line across the outside of the unit fro
5. LY PRI 8A 1 71 004 0433 CARRIER 8B 3 34 004 1003 CLUSTER GEAR 8C 3 7104 0121 PLANET SHAFT PRIMARY 8D 6 01 105 0010 BEARING 8E 6 71 004 0861 PLANET WASHER 8F 3 01 153 0020 ROLL PIN 12 z 5 5 RING GEARS 12A 1 34004 1005 RING GEAR SECONDARY 12B 1 34004 1006 RING GEAR PRIMARY 14 H THRUST WASHERS AND BEARINGS 14A 1 25 004 1132 CARRIER THRUST WASHER 14B 1 01 112 0030 THRUST RACE 16 5 5 gi SEALS amp O RINGS 16A 1 01 405 0740 SEAL 16B 2 01 402 0020 O RING 16C 1 01 402 0040 O RING SHIFTER SHAFT 16D 1 01 402 0010 O RING 20 ka OUTPUT SHAFT BEARINGS 20A 1 01 102 0120 BEARING CONE 20B 1 01 103 0110 BEARING CUP 20C 1 01 102 0250 INNER BEARING CONE 20D 1 01 103 0250 INNER BEARING CUP 25 5 te HARDWARE 25A 20 01 150 1990 HHCS 7 16 20 x 7 5 GR8 25B 2 01 150 0110 HHCS 5 8 11 X 1 3 4 25C 12 01 150 0520 SHCS 3 8 16 X 1 1 4 GR8 25G 20 01 166 0340 7 16 LOCK WASHER 25H 2 01 166 0040 LOCKWASHER 5 8 ZINC PLATED 30 5 g PLUGS amp FITTINGS 30A 2 01 207 0041 PLUG 1 2 NPT MAG 30B 1 01 203 0031 ELBOW 1 4 NPT X 90 1 4 JIC 30C 1 01 203 0032 CAP 40 g s z MISCELLANEOUS 40A 1 71 002 0601 SINGE ACTING STD HYD 40A 1 71 002 1351 SINGLE ACTING HD HYD 40B 1 34 005 2007 BAIL ASSEMBLY 40C 7 25 004 1051 SHIM 40D 1 25 004 1192 LOCK RING 40E 1 25 004 1182 SPLIT RING 40F 1 71004 0241 SHIFT LEVER 40G 1 01 160 0330 SNAP RING 40H 1 01 160 0340 SNAP RING 40J 2 01 155 0080 WOODRUFF KEY 40K 1 71 004 0151 BEARING TOP CASE 40L 1 71 004 0282 S
6. ar 4 out of case Shifter gear should be free of nicks burrs or gouges Use a screwdriver wood chisel or similar flat strong tool ground flat for insertion between the aluminum top case 3 and the ring gear 12A Tap lightly on tool do not drive into case heavy prying will damage the o ring contact surfaces in the case Re move the top case assembly Items 3 6A 6B 12B 14B 25C 30A 40K and 40P Lift the primary planet carrier subassembly out of the unit 8 If sun gear 7 has not been removed from digger drive do so now Sometimes the sun gear sticks to the primary carrier 8 Remove secondary ring gear 12A Inspect top case to gear and gear to base O ring 16B discard if damaged or deformed Lift the secondary planet carrier subassembly out of the unit 5 The unit is now disassembled into groups of parts The area s requiring repair should be identified by thorough inspection of the individual components after they have been cleaned and dried Primary Carrier Assembly Teardown Items 8A 8B 8C 8D 8E and 8F eS A UE any Rotate planet gears 8B to check for abnormal noise or roughness in bearings 8D If further inspection or re placement is required proceed as follows Drive roll pins 8F completely into the planet shafts 8C Slide planet shafts 8C out of carrier 8A Remove planet gears 8B washers 8E and bearings 8D from carrier 8A Inspect the planet gear plan
7. e shift cylinders Damaged fittings or rod ends may be replaced if necessary All subassembly service or repairs should be complete at this time Continue to Unit Assembly to complete unit build up Unit Reassembly 1 Install the secondary carrier assembly onto the output shaft align the splines of the carrier 5A with the output shaft 2 splines and slide the carrier onto the shaft 2 Lubricate o ring s 16B and install on the ring gear 12A pilot Caution Hold ring gear s by outside diameter or use lifting device to prevent injury 3 Align gear teeth of secondary ring gear 12A with the gear teeth of the planet gears 5B and place on base then align mounting holes of ring gear with holes in base Use the scribed line made during disassembly for reference 4 Install the secondary sun gear 7 into the secondary car rier assembly 5 and then install primary carrier assembly 8 A special tool should be made for the timing process An old shifter gear cut off above the lower gear and welded to a 6 long bolt works well If an extra shifter gear is not available the timing will be more difficult the timing tool keeps gears in time as Model 34 service manual SM34L AA Page 5 Eskridge Inc Olathe Ks 913 782 1238 www eskridgeinc com they mesh with primary ring gear 12B mounted in top case 3 5 Timing procedure The diagram below shows the orienta tion of the cluster gears 8B for co
8. e socket head cap screws 25C from ring gear and remove To remove sun gear 6A first remove retaining ring 40P and thrust washer 14B To disassemble shift lever and fork remove E type retaining ring 40G on inside then slide apart Inspect o ring 16C on shifter shaft 45 for damage Lubricate shaft with grease when reassembling Clean and inspect all remaining parts bushings in the top case and sun gear for example and replace any that are worn or damaged Top Case Reassembly 1 Install primary ring gear 12B into top case 3 2 Prior to inserting socket head cap screws coat the inter nal threads of the top case with Loctite 242 thread locking compound or equivalent Tighten cap screws to a torque of 30 ft lb 3 Install the sun gear 6A and lightly coat the bushing with grease 4 Install the thrust washer 14B and retaining ring 40P 5 Lubricate shifter shaft 45 and O ring 16C with grease when reassembling Insert the shifter shaft assembly 16C 40F 40H 40J and 45 into case 3 and shifter fork 40L then retain with E ring 40G Shifter Gear Assembly Teardown 1 To disassemble shifter gear assembly 4 40M and 40N remove retaining ring 40N and pull pieces apart 2 Check for worn parts replace as necessary Reassembly 1 Reassemble in reverse order Note If the shift cylinder assembly 40A is damaged it must be replaced as a unit Eskridge does not sell repair kits for th
9. et shaft and bearings Check for spalling bruising or other damage and replace compo nents as necessary Remove roll pins 8F from planet shafts using a 3 16 inch pin punch Primary Carrier Reassembly Press two bearing assemblies 8D into each cluster gear 8B Place one washer on top and one washer on bottom of the cluster gear and install into carrier Planet shafts 8C should be installed with chamfered end of 3 16 inch roll pin hole towards outside diameter of car rier 8A this will ease alignment of holes while inserting roll pins Drive roll pin 8F into the carrier hole and into planet shaft to retain parts Repeat for remaining planet gears Model 34 service manual SM34L AA Page 3 Eskridge Inc Olathe Ks 913 782 1238 www eskridgeinc com Secondary Carrier Assembly Teardown Items 5A 5B 5C 5D 5E 5F and 5G Rotate planet gears 5B to check for abnormal noise or rough ness in bearings 5D If further inspection or replacement is required proceed as follows Drive roll pins 5F completely into the planet shafts 5C Slide planet shafts 5C out of carrier 5A Remove planet gears 5B washers 5E and bearings 5D from carrier 5A Inspect the planet gear planet shaft and bearings Check for spalling bruising or other damage and replace components as necessary Note When using loose uncaged individual roll ers all rollers in the planet gear should be replaced if any are found t
10. ld be taken to avoid personal injury Care should also be taken not to damage it while pressing through base Note Removing the shaft from the base assembly damages the shaft seal and the seal will need to be replaced 2 Place bearing carrier 1 external side down on a plate or table Press output shaft out bottom of base by applying a load to internal end of shaft until it passes through inner shaft bearing cone 20C 3 A gear puller may be used to remove the outer bearing cone 20A from the shaft 2 If reusing old bearing cone do not pull on or damage roller cage Remove the shaft seal 16A for inspection or replacement 4 Inspect inner and outer bearing cups 20B 8 20D If cups are damaged drive them out using a brass drift and utiliz ing the bearing knock out notches in the base 1 Bearing Carrier Reassembly 1 Clean all foreign material from the magnetic oil plug 30A located on bearing carrier 1 2 Place bearing carrier 1 exterior side up on work table 3 Apply a layer of lithium or general purpose bearing grease to the roller contact surface of outer bearing cup 20B 4 Press outer bearing cone 20A onto the shaft until it seats against the shoulder 5 Place the shaft 2 with the bearing 20A into the base 1 Model 34 service manual SM34L AA Page 4 Eskridge Inc Olathe Ks 913 782 1238 www eskridgeinc com Flip shaft bearing carrier assembly and apply lithium or general purpose
11. m the bail 40B to the bearing carrier 1 before disassembly to aid in the proper positioning of pieces during reassembly Remove drain plugs 30A and drain oil from unit The oil will drain out more guickly and completely if warm Remove upper shift cylinder 40A bolt If shifter performance is in doubt leave lower bolt in place and follow cylinder adjust ment procedure Step 14 in Unit Assembly Procedure to see if poor cylinder adjustment could be the cause of no shift or partial shift condition Remove lower shift cylinder 40A bolt nut and washer The bolt and nut are accessible through the clearance hole in the bail Remove the twenty 7 16 20 cap screws 25A and lockwash ers 25G and lift the bail 40B from the unit Remove two cap screws 25B and lock washers 25H from hydraulic motor 50 Notice that the motor is larger on one side it must be replaced the same position as removed Re move motor from unit Check o ring 16D for damage Observe location of shift fork 40L shifter gear assembly Items 16C 40F 40G 40H 40J and 45 and top case 3 Check for binding or loose shift connections Press down on shift lever 40F Remove shifter gear assembly Items 4 40M and 40N If shifter is jammed and sun gear 4 cannot be removed dismantle shifter assembly in the case by removing snap rings 40G Pull shifter shaft out 45 of case Pull shifter collar assembly 40M fork 40L and shifter ge
12. o be defective Remove roll pins 5F from planet shafts using a 3 16 inch pin punch Secondary Carrier Reassembly Loose roller installation a Set planet washer 5E on work table with planet gear 5B on top of it Center planet washer to planet gear as closely as possible b Center planet shaft 5C in planet gear 5B bearing bore c Begin placing rollers 5D around shaft 5C There should be clearance for last roller to slide in Install spacer 5G then install second row of rollers d Place a washer 5E over gear 5B and shaft 5C e Carefully slide assembly off of table holding planet wash ers 5E against planet gear 5B f Slide planet shaft 5C out of the assembly and slide as sembly into carrier Planet shafts 5C should be installed with chamfered end of 3 16 inch roll pin hole towards outside diameter of carrier 5A this will ease alignment of holes while inserting roll pins 5F Drive roll pin 5F into the carrier hole and into planet shaft to retain parts Repeat for remaining planet gears Bearing Carrier Subassembly Teardown Items 1 2 16A 16B 20A 20B 20C 20D 30A 40C 40D and 40E Am K 1 Remove the lock ring 40D using a heel bar or puller if using a heel bar be sure not to pry against the cage of the inner output shaft bearing 20C Remove the split ring segments 40E and shims 40C Caution Since the shaft is no longer positively retained care shou
13. over Check all o rings to make sure they are properly seated In stall twenty cap screws 25A and lockwashers 25G and tighten to 80 ft lb dry 60 ft lb if the fasteners are lubricated Install and adjust shift cylinder Shifter cylinder should be compressed to its shortest length Next with the shifter gear pushed all the way up towards the motor adjust the length of the shifter cylinder to allow installation onto the bail tighten jam nuts and torque bolt to 20 ft lbs Verify smooth and complete shift operation The gearbox is not ready to use Model 34 service manual SM34L AA Page 6 Eskridge Inc Olathe Ks 913 782 1238 www eskridgeinc com
14. rature ESKRIDGE MODEL 34 OIL CAPACITY The oil capacity of this unit is 9 75 pints 4 6 liters Proper oil level will measure to middle of primary ring gear when auger drive is in vertical position To check the oil in fully assembled units fill the gear drive FILL PORT with the proper oil see information above until it runs out of the fill plug while the auger drive is leaning oyu approximately 4 30 inches from vertical approximately 7 see the illustration to the right CS Ww Troubleshooting VI Rattling Grinding or Whining Noises Hydraulic motor failure and or difficulties are commonly confused with gear drive problems as they can share similar symptoms reports of rattling grinding or whining noises in the digger assembly Carefully check the hydraulic motor for problems before removing the digger drive from the boom If the digger drive is removed a motor problem can only be determined by testing the motor on a hydraulic test stand or by eliminating the gear drive as the noise source after a total teardown of the unit If you determine that the hydraulic motor is the source of the problem please contact the original eguipment manufacturer of the digger drive assembly Shifting Difficulties Jumping Out of Gear This symptom commonly attributed to gear drive failure can be due to air in the hydraulic lines leading to the drive not the drive itself Excessive back pressure in the system may also cause this problem
15. rrect timing There are machinist s marks on each of the three cluster gears 8B These marks should be aligned so that each points toward the center of the primary planet carrier Use the of the timing tools mentioned above will make top case installation easier Leave the timing tool in the center of the cluster gears and use it to rotate them until top case is properly installed Install o ring 16B onto top case 3 While keeping the timing marks aligned position the top case near the proper orienta tion to scribed line on outside of unit Work top case down until fully seated with gears in time CAUTION If unit is not properly timed the gear drive will be se verely damaged Be sure gear drive turns smoothly and easily 7 8 9 10 11 12 13 14 Install shifter gear assembly 4 40M and 40N by pushing down on the shift lever 40F to allow clearance Fill unit with EP 80 90 gear oil to proper level as specified on Page 3 Install o ring 16D onto hydraulic motor 50 Using hand tools to avoid stripping the aluminum install hydraulic motor on mounting pad on top case 3 with two cap screws 25B and lockwashers 25H torque to 130 ft lbs Bolt lower end of shift cylinder assembly 40A to shift lever 40F torque the jam nut to 20 ft lbs Line up scribe mark on bail assembly 40B with scribe mark on top case 3 and lower bail over hydraulic motor 50 until bail flange contacts the c
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