SERVICE MANUAL 375 SERIES DIGGER MODELS Example Part
Contents
1. ESKRIDGE SERVICE MANUAL 375 SERIES DIGGER MODELS Example Part Number ANA Model Ratio Shaft Bail Boss Morar Motor Back apin Supplier Number Protection THIS SERVICE MANUAL IS EFFECTIVE NOTE Individual customer specifications spindle S N 122100 TO CURRENT mounting sprocket pilot brake assembly etc may vary from exploded drawing and standard part num bers shown If applicable refer to customer drawing for details DATE 9 2014 TO CURRENT VERSION SMD375334 54F104BP_AB INSTALLATION INFORMATION The 375 drive head is designed for anchor setting and digger applications This drive head uses a high efficiency solenoid actuated two speed axial piston motor of optimum performance The drive head includes an energy protection system that truncates pressure spikes and controls gearbox back driving generated from an anchors torsional energy These drives require a customer supplied mounting ap paratus for connection to the customers mechanized equipment The maximum allowable motor pressure is 5000 psi and the maximum flow is 225 GPM in low speed and 130 GPM in high speed Refer to chart below for more performance information The hydraulic motor requires an external 300 700 psi charge pressure and will need to be filled with hydraulic oil up to the case drain port The motor will requires a case drain For two speed operation the pressure reducing valve will need to be supplied with 24V The volt age shifts the motor fro2. 84F104BP Page 2 Eskridge Inc Olathe KS 913 782 1238 www eskridgeinc com LUBRICATION amp MAINTENANCE GEARBOX OIL REQUIREMENTS Use the chart below to determine an appropriate lubricant viscosity Use only EP extreme pressure or API GL 5 designated lubricants The lubricants pour point needs to be 10F below the minimum ambient temperature Change the lubricant after the first 50 hours of operation and at 500 hour intervals thereafter The drive should be partially disassembled 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 Min Ambient operating temp Max Ambient temp Max Operating temp 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 temperature Operating Position Oil Capacity Oil Level Vertical Shaft Shaft Down 21 gal To midway on upper primary gear set HYDRAULIC MOTOR OIL REQUIREMENTS The maximum motor service life is obtained by using a fluid that meets or exceeds ISO cleanliness specifications code 18 13 ISO 4406 Arecommended
3. RETAINING RING 5L 1 45 004 1005 PLATE 4500 SEC CARRIER 6 1 45 004 1002 SUN GEAR 7 e 1 60 005 2133 CARRIER ASSEMBLY SECONDARY 7A 1 60 004 1774 CARRIER SEC 78 4 60 004 1232 PLANET GEAR SEC 7C 4 60 004 1262 PLANET SHAFT SEC 600 1400 7D 8 01 102 0210 TAPERED BEARING CONE 7E 8 01 103 0210 TAPERED BEARING CUP 7F 4 01 153 0150 ROLL PIN 1 4 X 1 3 8 7G 8 60 004 1291 WASHER SEC PLANET 600 1000 1400 7H 8 60 004 1321 _ SHIM SECONDARY PLANET 7J 4 01 160 0490 RETAINING RING EXTERNAL 5100 262 7K 8 01 160 0500 RETAINING RING 7L 1 60 004 1352 SECONDARY CARRIER RETAINER 8 1 60 004 1792 SUN GEAR 9 1 60 005 2203 CARRIER ASSEMBLY 9A 1 60 004 1722 CARRIER PRI 9B 3 60 004 1960 CLUSTER GEAR LOOSE ROLLER 9C 3 60 004 1272 PLANET SHAFT PRI 9D 168 01 106 0050 PLANET ROLLER 9E 6 60 004 1881 WASHER PRI PLANET oF 3 01 153 0150 ROLL PIN 1 4 X 1 3 8 9G 12 60 004 1891 SPACER WASHER 1400 PRI 9H 3 01 160 0750 _ RETAINING RING INTERNAL 5008 187 12 RING GEARS 12A 1 60 004 1213 RING GEAR COMPOUND PRI 12B 1 60 004 1253 RING SPACER CMPD PRI 600 1000 12C 1 60 004 1243 RING GEAR SEC 1000 12D 1 45 004 1001 RING GEAR 14 THRUST WASHERS amp BEARINGS 14A 1 01 112 0060 THRUST WASHER 14G 2 01 112 0350 THRUST RACE AS120155 14L 1 01 112 0340 THRUST BRG AXK120155 16 1 45 016 2001 SEAL KIT 16A 1 01 405 0838 SEAL 16B 4 01 402 0660 O RING 2 389 16C 2 01 402 1015 O RING 34 5
4. further inspection or replace ment is required proceed as follows Drive roll pins 5F completely into the planet shafts 5C Press or drive planet shafts 5C out of carrier 5A Remove planet gears 5B and spacers 5G from the carrier 5A Inspect the planet gear 5B and planet bearings 5D for spalling bruising or other damage Replace any parts where abnormal wear is found Use 1 4 inch pin punch to remove roll pins 5F from planet shafts 5C Reassembly Install carrier retainer 5L into carrier 5A Place planet spacers 5G onto planet bearings 5D and install assembly into carrier 5A Model DH375 service manual SMD375334 84F104BP Page 6 Eskridge Inc Olathe KS 913 782 1238 www eskridgeinc com 2 Planet shafts 5C should be installed with chamfered end of 1 4 inch hole toward outside diameter of the carrier 5A This will aid in alignment of holes while inserting roll pins 5F 3 Drive aroll pin 5F through the carrier hole and into the planet shaft to retain the parts Repeat for other planet gears Base Subassembly Items 1 2 16A 16B 20A 20B 25E 30B 35A 35B 35C amp 35H Disassembly 1 Remove the seal carrier retaining screws 25E and seal car rier 35H from unit Inspect seal 16A and o ring 16B for signs of wear or damage and replace as necessary 2 Remove the lock ring 35C using a heel bar or puller if using a heel bar be sure not to pry against th
5. 25E and torque to 110 ft lbs dry and 80 ft lbs lubed Flip this assembly resting the base 1 on the end of the output shaft 2 Apply a layer of lithium or general purpose bearing grease to the roller contact surface of the inner cup 20B Press the inner bearing cone 20A large end up as shown onto the shaft 2 until it is seated against inner bearing cup 20B The shaft bearing preload needs to result in a rolling torque between 300 to 400 in lb Adding shims 35A will increase the pre load on the bearing set Install the Load N Lock segments 35B over the shims 35A and into the groove in the shaft 2 When the load and lock assembly is installed properly it will not rotate because it is firmly engaged with the shims Finally install the lock ring 35C over the segments 35B All subassembly service or repairs should be complete at this time Continue to Unit Assembly to complete unit buildup Model DH375 service manual SMD375334 84F104BP Page 7 Eskridge Inc Olathe KS 913 782 1238 www eskridgeinc com 9 10 11 12 Unit Assembly When all subassemblies are complete the unit is ready to be assembled Install the Stage Ill carrier assembly onto the output shaft align the splines of the carrier 5A with the splines of the shaft 2 and slide the carrier onto the shaft Place removable thread locking compound onto the 3 8 24 flathead capscrews 25F Install capscrews into carrier re taining p
6. ID 16D 1 01 402 1016 O RING 272 20 a a OUTPUT SHAFT BEARINGS 20A 2 01 102 0315 BEARING CONE 208 2 01 103 0315 BEARING CUP 25 HARDWARE 25A 70 01 150 1580 HEX HEAD CAP SCREW 25B 8 01 150 2072 HEX HEAD CAP SCREW M16X2X180 25C 4 01 150 2070 HHCS M24X3X55mm C8 8 25D 12 01 150 0570 SOC HD CAP SCREW 25E 8 01 150 0030 SHCS 1 2 13 X 1 1 4 GR 8 25F 9 01 150 1590 FLAT HEAD HEX SOCKET CAPSCREW 25G 70 01 166 0350 FLAT WASHER 3 4 x 1 25 O D HARDENED 25H 8 01 166 0230 FLAT WASHER 5 8 SAE 25J 4 01 166 0490 _ FLAT WASHER M24 ZINC 30 PLUGS amp FITTINGS 30B 8 01 208 0030 HOLLOW HEX PLUG 05HP 12 30F 2 01 215 0050 GREASE FITTING 35 z e si MISCELLANEOUS 35A 5 45 004 1007 SHIM 358 1 45 004 1012 _ SPLIT RING 4500 35C 1 45 004 1011 LOCKING RING 35D 1 01 308 0180 _ ANTI SPIN BACK MANIFOLD 35E 2 01 201 0778 SPLIT FLANGE KIT 35F 2 01 201 0779 SPLIT FLANGE PLUG 35G 1 01 160 0510 RETAINING RING INTERNAL 35H 1 45 004 1000 SEAL CARRIER 37 1 BAIL ASSY 37 1 45 005 2010 _ BAIL ASSY Q4 0 BAIL BOSS 37 1 45 005 2011 BAIL ASSY 4 5 BAIL BOSS 50 1 01 304 1040 MOTOR Model DH375 service manual SMD375334 84F104BP Page 4 Eskridge Inc Olathe KS 913 782 1238 www eskridgeinc com Unit Disassembly Procedure 1 10 11 12 13 14 15 16 Scribe a diagonal line across the outside of the unit from the bail 37 to the base 1 before disass
7. anet gearing is timed correctly Finish installing 20 3 4 10 hex head capscrews 25A with flat washers 25G into the Stage Il and Stage assembly Torque the capscrews to 380 ft lbs dry 280 ft lbs lubricat ed Install motor 50 onto cover 3A Install 4 M24 fasteners 25C and washers 25J Torque fasteners to 420 ft lb dry 360 ft lbs when lubricated Remove temporally fasteners installed in Stage Ill gear as sembly Place bail 37 onto assembly and aligning holes in bail and cover using scribed line made during disassembly as a reference Install 50 3 4 10 hex head capscrews 25A with flat washers 25G Torque the capscrews to 380 ft lbs dry 280 ft lbs lubricated Fill the unit to the proper level as specified with GL5 EP oil The digger is now ready to use Model DH375 service manual SMD375334 84F104BP Page 8 Eskridge Inc Olathe KS 913 782 1238 www eskridgeinc com
8. e cage of the inner output shaft bearing 20A Remove the split ring segments 35B and shims 35A Caution Since the output shaft is no longer retained care should be taken to avoid personal injury Care should also be taken not to damage it when it is pressed through base 3 Base 1 should be set with output shaft side down as shown on a plate or table Press output shaft through the bottom of base by applying a load to top end internal end of shaft until it passes through inner shaft bearing cone 20A 4 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 Inspect inner and outer bearing cups 20A amp 20B If cups are damaged drive them out using a brass drift Reassembly Place base 1 output side up opposite shown on the table Apply a layer of lithium or general purpose bearing grease to the roller contact surface of outer bearing cup 20B Press outer bearing cone 20A large end down as shown onto the shaft until it seats against the shoulder Note Press bearing cone onto output shaft by pressing on in ner race only DO NOT press on roller cage as it may damage bearing Place the shaft 2 with the bearing 12A into the base 1 Install o ring 16B onto seal carrier 35H Lubricate inner lip of shaft seal 16A and slide seal carrier assembly onto the shaft 2 Install seal carrier fasteners
9. embly to aid in the proper positioning of pieces during reassembly Remove magnetic drain plugs 30B and drain oil from unit The oil will drain out faster and more completely if warm Remove the fifty hex head 25A flat washers 25G capscrews and Separate bail 37 from gearbox and remove from digger assembly Install two hex head capscrews 25A into cover 3B to retain gearbox assembly together while disassembling motor Stage and Stage Il assemblies Remove motor 50 from cover 3A by removing four hex head fasteners 25C and flat washers 25J Remove 20 3 4 10 capscrews 25A and flat washers 25G Remove cover 3A thrust bearings 14A 14G amp 14L and input gear 4 Inspect o ring 16B discard if damaged or deformed Lift Stage planetary carrier assembly 9 out of the unit Remove ring gear spacer 12B and inspect o ring 16B discard if damaged or deformed Remove Stage Il sun gear 8 from secondary carrier assembly 7 Remove the three 3 8 24 flat head capscrews 25F securing the carrier retaining plate 7L to the Stage III sun gear 6 Remove Stage II ring gear 12C and Stage II carrier assem bly 7 Inspect o ring 16B discard and replace any dam aged or deformed o rings Remove two hex head capscrews 25A from cover 3B Lift cover from gearbox Inspect o ring 16C discard and replace any damaged or deformed o rings Remove Stage III sun gear 6 from Stage III carrie
10. he planet gears each have a timing mark usually a round punch locate timing marks on planet gear 9B b As seen from above start with the top planet gear and position it s timing mark pointing straight down Next ro tate the lower left planet gear counterclockwise as indi cated in the timing diagram Then rotate the lower right planet gear clockwise as indicated c Setthe input gear 4 and the input thrust race 14A into the center of the primary planet carrier assembly d If compound primary ring gear 12A was not removed during disassembly then skip to step 13 Otherwise bolt to the inside of the cover 3A with twelve bolts 25D Use a removable thread locking compound on the threads of the bolts Tighten to 110 ft lbs dry or 80 ft lbs lubricated 13 14 15 16 17 18 18 19 TIMING DIAGRAMS ROTATE 2 2 3 TEETH ROTATE 2 2 3 TEETH Install thrust washer 14G onto Stage carrier then install thrust bearing 14L and thrust washer 14G Lubricate o ring 16B and install on the pilot of the cover 3A Noting the scribed line made during disassembly install the cover 3A Install 2 fasteners 25A into Stage Ill ring gear and 2 fasteners 25A into Stage Il and Stage to constrain unit while spin testing Ensure the unit spins freely by using a splined shaft to drive the input gear 4 If unit does not rotate freely for one revolu tion remove cover and verify Stage pl
11. late 5L and torque to 35ft lbs Install Stage IIl sun gear 6 into Stage III carrier assembly Lubricate o ring 16C and install on the pilot of the Stage IIl ring gear 12D Align gear teeth of ring gear 12D with the gear teeth of the planet gears 5B and place on base Align mounting holes of ring gear with holes in base Using the scribed line made during disassembly for reference Lubricate o ring 16C and install on the pilot of the cover 3B Install cover onto Stage III ring gear 12D and align mounting holes Install Stage II carrier assembly onto the Stage Ill sun gear 6 splines The carrier retaining plate 7L holes need to be positioned so that all fasteners can be installed Place removable thread locking compound onto the 3 8 24 flathead capscrews 25F Install capscrews into carrier retaining plate 7L and torque to 35ft Ibs Lubricate o ring 16B and install on the pilot of the Stage Il ring gear 12C Align gear teeth of ring gear 12C with the gear teeth of the planet gears 7B and place on cov er 3B Align mounting holes of ring gear with holes in base Install Stage Il sun gear 8 into Stage II carrier assembly 7 Lubricate o ring 16B and install on the pilot of the Stage ring gear spacer 12B then install spacer Place Stage carrier assembly 9 onto Stage II sun gear 8 Compound primary timing instructions a The planet gears will now need to be timed Refer to the diagram T
12. m 355cc maximum displacement to 150cc minimum displacement The motor has an internal protection system that increases displacement when 4700psi is reached at minimum displacement The motor will continue to increase its displacement until the pressure drops below 4700psi or maximum displacement is reached The motor is fixed at maximum displacement if an electrical signal is not applied to the pressure reducing valve Refer to drawing below for motor electrical and hydraulic locations PRESSURE REDUCING VALVE AIR AMP JUNIOR TIMER 2 POLIG CASE DRAIN PORT AMPS 75mA ISO 9974 1 M33 X 2 PWM 100Hz _ Q OIL PORT A 780 12 OIL PORT B SAE J518 1 1 2 CODE 62 24 SAE J518 1 1 2 CODE 62 24 EXTERNAL SUPPLY PRESSURE PORT PRESSURIZE THIS PORT FOR PRESSURIZE THIS PORT FOR ISO 9974 1 M16X1 5 CLOCKWISE ROTATION COUNTER CLOCKWISE ROTATION NOTES 1 A 300 700 PSI CHARGE PRESSURE IS REQUIRED FOR THE HYDRAULIC MOTOR TO SHIFT INTO MIN DISPLACEMENT 2 BEFORE OPERATION MOTOR MUST BE FILLED WITH HYDRAULIC OIL TO CASE DRAIN 3 CASE DRAIN REQUIRED 4 ACTIVATE SOLENOID FOR MINIMUM DISPLACEMENT WHEN MOTOR REACHES 4700 PSI AT MINIMUM DISPLACEMENT THE DISPLACEMENT WILL INCREASE AT A CONSTANT 4700 PSI UNTIL MAXIMUM DISPLACMENET IS REACHED TORQUE vs PRESSURE SPEED vs FLOW 350 000 en a TORQUE LOW TORQUE HIGH 50 000 i 2000 3000 4000 PRESSURE psi FLOW gpm Model DH375 service manual SMD375334
13. motor filtration of 10um absolute is recommended Hydraulic main circuit oil temperatures should not exceed 176 F 80 C and drain fluid should not exceed 212 F 100 C Hydraulic fluid type HLP DIN 51524 automatic transmission fluids type A or API CD engine oils can be used When hydraulic system has reached full operating temperature the minimum oil viscosity from the motor drain should be above 8 mm s cSt At motor startup the hydraulic fluid viscosity should not exceed 1500 mm s cSt The ideal operating range for the hydraulic fluid viscosity is 15 to 30 mm s cSt Model DH375 service manual SMD375334 84F104BP Page 3 Eskridge Inc Olathe KS 913 782 1238 www eskridgeinc com SKRIDGE 375334 EFFECTIVE FROM SN 122100 04 17 14 TO PRESENT PARTS LIST GROUP ITEM QTY PARTNUMBER DESCRIPTION 1 1 45 004 3001 BASE 2 1 45 004 4001 SHAFT 3 5 COVERS 3A 1 60 004 1961 COVER 3B 1 45 004 2001 COVER 4 1 45 004 1006 INPUT GEAR 5 1 45 005 2001 CARRIER ASSEMBLY 5A 1 45 005 1010 CARRIER 5B 4 45 004 1003 PLANET GEAR 5C 4 45 004 1004 PLANET SHAFT 5D 8 01 110 0130 SPHERICAL ROLLER BEARING 5F 4 01 153 0242 ROLL PIN 5G 8 45 004 1008 THRUST WASHER 5J 4 01 160 0828
14. r using any needed new parts Install rollers in gear as follows a Set planet gear 9B onto table Install one roller spacer 9G into planet gear bore and seat on internal retaining ring 9H b Center the planet shaft 9C in the planet gear 9B bearing bore c Begin placing rollers 9D around the shaft 9C There should be clearance for the last roller to slide in Be sure to install 28 rollers in each planet gear d Place spacer washer 9G onto planet rollers Model DH375 service manual SMD375334 84F104BP Page 5 Eskridge Inc Olathe KS 913 782 1238 www eskridgeinc com e Place thrust washer 9E onto planet gear 9B remove planet shaft f Carefully slide the assembly off the table and rotate 180 degrees placing thrust washer onto table Repeat steps 1 a f g Align the planet gear bearing assembly inside the carrier and install the planet shaft through the entire assembly Planet shaft 9C should be installed with the chamfered end of the 3 16 inch hole towards the outside diameter of the carrier 9A this will aid in alignment of holes while inserting roll pins 9F Drive roll pin 9F into the carrier hole and into the planet shaft to retain the parts Repeat for remaining planet gears Stage Il Carrier Subassembly Items 7A 7B 7C 7D 7E 7F 7G 7H 7J 7K amp 7L Disassembly Rotate planet gears 7B to check for abnormal noise or roughness in bearings 7D amp 7E If fur
15. r assembly Remove the six 3 8 24 flat head capscrews 25F securing the carrier retaining plate 5L from output shaft 2 Remove Stage Ill ring gear 12D and Stage Ill carrier assembly 5 Inspect o ring 16C discard and replace any damaged or deformed o rings The unit is now separated into subassemblies The area s requiring repair should be identified by thorough inspection of the individual components after they have been cleaned and dried 6 Stage Carrier Subassembly Items 9A 9B 9C 9D 9E 9F 9G amp 9H Disassembly Rotate planet gears 9B to check for abnormal noise or roughness in bearings 9D or planet shafts 9C If further inspection or replacement is required proceed as follows Drive roll pins 9F completely into the planet shafts 9C Press or drive planet shafts 9C out of carrier 9A Remove planet gears 9B and thrust washers 9E amp 9G and bearings 9D from the carrier 9A Inspect the planet gear 9B bearing bore planet shaft 5C and rollers 5D Check for spalling bruising or other damage Replace components as necessary rollers should be replaced as a set of 56 Replace any parts where abnormal wear is found Use 3 16 inch pin punch to remove roll pins 9F from planet shafts 9C NOTE If either the rollers or the planet shafts pins are damaged both components should be replaced 1 Reassembly Rebuild primary planet carrier assembly in reverse orde
16. ther inspection or replacement is required proceed as follows Removing retaining ring 7J washer 7G and shims 7H from planet shaft 7C Press planet shafts 7C out of carrier 7A Remove planet gears 7B and washer 7G from carrier Inspect the planet gear 7B bearing cone 7D bearing cup 7E and planet shaft 7C Check for spalling bruising or other damage Replace components as necessary bearing need to be replaced as a cup and cone set Replace any parts where abnormal wear is found Reassembly Rebuild Stage II planet carrier assembly in reverse order using any needed new parts Install bearing cones 7D into planet gear bearing cups 7E Place washer 7G onto interior carrier spot faced surface Place carrier retainer 7L into carrier 7A Insert planet gear assembly into carrier 7A Slide planet shaft 7C into carrier and align planet pin notch with roll pin in carrier Place shims 7H and washer 7G onto planet shaft Install retaining ring 7J Rotate plant gears by hand to test bearing preload Correct bearing preload on the planet gears requires 50 75 in lbs rotating torque If gear doesn t rotate remove a shim and test again until a smooth loaded rotation is devel oped Repeat for remaining planet gears Stage Ill Carrier Subassembly Items 5A 5B 5C 5D 5F 5G 5J amp 5L Disassembly Rotate planet gears 5B to check for abnormal noise or roughness in bearings 5D If
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