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3 

 

Planetary Final Drive Service Manual 

Content 

 

 

Introduction 

 

  4 

 

Brake Test 

 

  5 

 

Roll and Leak Test 

 

  8 

 

Tightening and Torquing Bolts 

 

11 

 

Lubrication Information 

 

12 

 

Seal Installation Instructions 

 

14 

Disassembly Instructions

 

Main Disassembly 

 

18 

 

Cover Disassembly 

 

22 

 

Input Coupling Disassembly 

 

24 

Input Brake Disassembly 

 

 

 

 

26

 

Housing-Spindle Disassembly   

 

 

 

28

 

Output Planet Gear Disassembly 

 

 

 

32

 

Input Carrier Disassembly 

 

 

 

 

33 

Assembly Instructions

   

Cover Subassembly 

 

 

 

 

 

36 

Input Carrier Subassembly 

 

 

 

 

38 

Output Planet Gear Subassembly 

 

 

 

40 

Input Coupling Subassembly 

 

 

 

 

41

 

Housing-Spindle Subassembly   

 

 

 

43 

Main Assembly   

 

 

 

 

 

46 

Assembly Drawing 

 

 

 

 

 

51 

Parts List 

 

 

 

 

 

 

52 

Assembly Tools  

 

 

 

 

 

54 

General Information

  

 

Contact Information 

 

 

 

 

 

70

 

Summary of Contents for Torque-Hub CW18 Series

Page 1: ...1 Torque Hub Planetary Final Drive CW18 Series Service Manual Rev 01 28 14 ...

Page 2: ...assumes no liability with respect to the use of the documentation described herein or for any act or omission of Fairfield Manufacturing Co Inc concerning this documentation Torque Hub is a registered trademark of Fairfield Manufacturing Co Inc Features and specifications are subject to change without notice ...

Page 3: ...isassembly 22 Input Coupling Disassembly 24 Input Brake Disassembly 26 Housing Spindle Disassembly 28 Output Planet Gear Disassembly 32 Input Carrier Disassembly 33 Assembly Instructions Cover Subassembly 36 Input Carrier Subassembly 38 Output Planet Gear Subassembly 40 Input Coupling Subassembly 41 Housing Spindle Subassembly 43 Main Assembly 46 Assembly Drawing 51 Parts List 52 Assembly Tools 54...

Page 4: ...diagrammed in the Assembly Tools section Users should familiarize themselves with the procedures for roll and leak testing as well as bolt tightening and torquing found on the following three pages before starting any repairs Standard safety practices should be followed during the disassembly and assembly procedures described Safety glasses and safety shoes should be worn and heavy heat resistant ...

Page 5: ...hin limits shown in the brake chart on page 6 check to see if it has the proper number of springs using the SPRING CHECKING PROCEDURE Increase to maximum pressure refer to brake chart on page 6 and hold at that pressure for one minute If the brake does not leak or lose pressure the unit has passed the brake test If the brake loses pressure attempt to repair the leak using the leak repair procedure...

Page 6: ... 2940 B 902315B 9 138 184 190 3000 4410 C 902315 11 168 225 230 3000 5390 G 902315C 7 107 143 150 3000 3430 SPRING CHECKING PROCEDURE Install input brake bolts into holes in the brake piston Tighten bolts in such a way to ensure the brake piston remains straight while being compressed into the brake cavity of the spindle Carefully remove the retaining ring from the spindle Slowly remove bolts from...

Page 7: ...Install input brake bolts into holes in the Brake Piston Tighten screws in such a way to ensure the Brake Cover Plate remains straight while being compressed into brake cavity of Spindle Carefully remove the Retaining Ring from the Spindle Using two eyebolts threaded into opposite holes in the Brake Piston remove the Brake Piston from the Spindle Check O rings Backup Rings and brake cavity in Spin...

Page 8: ...n the unit applying constant force to the roll checker If more drag is felt in the gears only at certain points then the gears are not rolling consistently and easily and should be examined for improper installation or defects Some gear packages roll with more difficulty than others Do not be concerned if the gears in the unit seem to roll hard as long as they roll with consistency Rotate the gear...

Page 9: ...E DURING THE LEAK TEST Higher pressure will create a false sealing effect in assemblies with lip seals The unit has a leak if the pressure gauge reading on your leak check fitting starts to fall after the gearbox has been pressurized and allowed to equalize Leaks will most likely occur at the pipe plugs the main seal or wherever o rings or gaskets are located The exact location of a leak can usual...

Page 10: ...88489 CW18D11xxAxxx T188489 CW18D12xx4xxx T181663 CW18D14xxBxxx T184035 CW18D18xx4xxx T198122 CW18D21xxAxxx T188489 CW18E11xxAxxx T188489 CW18E11xx4xxx T188489 CW18E12xx4xxx T181663 CW18E14xxBxxx T184035 CW18E17xx8xxx T163056 CW18E18xx4xxx T198122 CW18E54xxBxxx T184035 ...

Page 11: ...e how to tighten and torque bolts or socket head cap screws in a bolt circle 1 Tighten but do not torque bolt A until snug 2 Go to the opposite side of the bolt circle and tighten bolt B until equally snug 3 Crisscross around the bolt circle and tighten the remaining bolts 4 Use a torque wrench to apply the specified torque to bolt A 5 Using the same sequence crisscross around the bolt circle and ...

Page 12: ...mmended viscosities for various ambient operating temperatures These recommendations are based on temperature rise of 50 to 100 F at normal operating conditions Continued on Next Page Differential Planetary Simple Planetary Ambient Temperature ISO Index AGMA Lubricant Number ISO Index AGMA Lubricant Number 40 to 5 F 1 VG100 3EP VG100 3EP 5 to 40 F VG150 4EP VG100 3EP 40 to105 F VG220 VG320 5EP 6EP...

Page 13: ...r continuous operation and no higher than 200 F for intermittent operation For special applications high horsepower high speeds or wide temperature changes please consult Oerlikon Fairfield Oil Fill Level When the Torque Hub unit is mounted horizontally unless otherwise specified the gearbox should be filled half full of oil Consult the appropriate series literature for approximate fill volumes Ve...

Page 14: ...an and have dried the O Rings should be placed back on the Seal Rings in their proper position The O Rings must be seated completely and tightly on the Seal Ring Always make sure that the O rings are not twisted or distorted by inspecting the mold flash seam on the outside diameter to see that is running true with the circumference Eliminate O Ring twist by gently pulling a section of the O Ring 2...

Page 15: ...ousing Always make sure that everything is seated symmetrically NOTE Misaligned seals and improperly seated O Rings can cause leakage or premature failure If small adjustments are necessary do not push directly on the Seal Ring 1 use the Installation tool 9 to push down or use the Adjustment Tool 11 to pull up NOTE Never use sharp instruments such as screwdrivers They can cause permanent damage to...

Page 16: ...tion After the two seal halves have been installed in their respective housings and just prior to assembly the faces should be thoroughly cleaned with Denatured Alcohol Next apply a thin film of oil EP90 the same oil that will be used to fill the assembly to the faces of the Seal Rings with a clean lint free cloth Warning Be careful not to get oil on the O Rings The seal set is now ready to be dra...

Page 17: ...17 DISASSEMBLY ...

Page 18: ...18 Planetary Final Drive Service Manual Main Disassembly Continued on Next Page ...

Page 19: ...mbling the unit 2 Remove the three magnetic Pipe Plugs 1U 14 and drain the oil out of the gearbox NOTE Record the condition and volume of the oil 3 Remove Bolts 27 13 from the Cover Subassembly 4 Lift the Cover Subassembly off of the unit Continued on Next Page ...

Page 20: ...he Housing 1G and the Ring Gear 4 6 CAUTION Safety glasses must be worn during these next steps 10 Remove the four External Retaining Rings 3C that are holding the spindle Planet Gears 3A in place 11 Carefully pry the Planet Gears 3A off of the spindle posts Be careful to not damage the Thrust Spacer 2 12 Remove Thrust Spacer 2 from Housing Spindle Subassembly NOTE Skip steps 13 14 and 15 if unit ...

Page 21: ...Mount 24 14 Remove Thrust Washer 30 from Adaptor Mount 24 15 Remove O Ring 25 from groove in Adaptor Mount 24 and discard O Ring 16 Remove the Input Brake Subassembly out of Hub Spindle Subassembly Refer page 26 for Input Brake Disassembly 17 Remove the Input Coupling Subassembly 9 out of Hub Spindle Subassembly This concludes the Main Disassembly ...

Page 22: ...22 Planetary Final Drive Service Manual Cover Disassembly Continued on Next Page ...

Page 23: ...g 5 from groove in the Cover 6A 12 and discard O Ring NOTE Skip step below if the unit has Thrust Washers glued in place 2 Remove Thrust Washers 10 and 11 from pockets in the Cover 6A 12 This concludes the Cover Disassembly ...

Page 24: ...24 Planetary Final Drive Service Manual Input Coupling Disassembly Continued on Next Page ...

Page 25: ...ng these next step 1 Remove Retaining Ring 22 18C from bore of Coupling 9 18A NOTE Skip step 2 for Assembly with Adaptor Mount 2 Remove Retaining Ring 18B from retaining ring groove of Coupling 9 18A This concludes the Input Coupling Disassembly ...

Page 26: ...26 Planetary Final Drive Service Manual Input Brake Disassembly Continued on Next Page ...

Page 27: ...ake Bolts from the Brake Piston 18A incrementally to release the tension off the springs slowly 6 Remove the Brake Thrust Plate 18B 7 Remove the Brake Springs 18R from the Brake Piston 18A 8 Remove the Brake Piston 18A out of the Spindle 1A 9 Remove the Backup Ring 18H and the O ring 18F from grooves in the Spindle 1A 10 Remove the Backup Ring 18I and the O ring 18G from grooves in the Spindle 1A ...

Page 28: ...28 Planetary Final Drive Service Manual Housing Spindle Disassembly Continued on Next Page ...

Page 29: ...29 1 Set the unit on a bench so that the Spindle 1A flange is down Continued on Next Page ...

Page 30: ... nut to the bottom as shown below 3 Using a larger drill bit typically 5 16 drill the bearing nut from the shoulder of the bearing nut to the bottom as shown below 4 Using a chisel split open the bearing nut through the larger drilled bore as shown below Continued on Next Page ...

Page 31: ...using 1G 10 Remove the Face Seal 1B halves or Outer of Lip Seal 1B from the Housing 1G 11 Remove the Bearing Cone 1D 1F from the Spindle 1A 12 Remove the Bearing Cone 1C from the Spindle 1A 13 Using a hammer and punch drive the inboard Bearing Cup 1C 1E out of the Housing 1G Be careful not to damage the counter bore in the housing 14 Turn the Housing 1G over and drive the outboard Bearing Cup 1E o...

Page 32: ...this next steps 2 Remove the upper Retaining Ring 3D from groove of the Planet Gear 3A 3 Remover Spacer Rings from either side of the Roller Bearing Assembly 3B 4 Remove the Roller Bearing assembly 3B and carefully slide into a snug fitting tube 5 Remove the lower Retaining Ring 3D from groove of the Planet Gear 3A This concludes the Output Carrier Disassembly ...

Page 33: ...t Gear 8F and push the Planet Shaft 8D out of the Carrier 8A The Thrust Washers 8B will slide off the shaft as it is removed 3 Using a hammer and punch drive the Roll Pin 8E out of the Planet Shaft 8D and Carrier 8A 4 Remove the Needle Bearings 8C from the inside of the Planet Gear 8F 5 Repeat steps 1 4 for the remaining two Planet Gears 8F This concludes the Input Carrier Disassembly ...

Page 34: ...34 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 35: ...35 ASSEMBLY ...

Page 36: ...36 Planetary Final Drive Service Manual Cover Subassembly Continued on Next Page ...

Page 37: ... the O ring 5 and place it in the groove in the Cover 6A 12 NOTE Skip step below if the unit has Thrust Washers glued in place 3 Place the Thrust Washers 10 and 11 into counter bore of Cover 6A 12 using grease to hold it in place This concludes the Cover Subassembly ...

Page 38: ...of the two rollers that form the space and then slide parallel to the other rollers into place 3 Place the Carrier 8A into the tool fixture so that one of the roll pin holes is straight up 4 Start Planet Shaft 8D with end opposite roll pin hole first through the planet shaft hole in Carrier 8A making sure that the roll pin hole in the planet shaft is straight up 5 Using ample grease to hold them i...

Page 39: ...meter punch NOTE The chamfer on the Roll Pin hole should be towards the roll pin hole in the Carrier 8 Drive the Roll Pin 8E into the roll pin hole in carrier and into the Planet Shaft 8D until the end of the roll pin is flush with the outside diameter of Carrier 8A 9 Repeat steps 4 to 8 for the remaining two Planet Gears 8F This concludes the Input Carrier Subassembly ...

Page 40: ...t steps 2 Install the upper Retaining Ring 3D from groove of the Planet Gear 3A 3 Install the Roller Bearing assembly 3B carefully 4 Install Spacer Rings on to the either sides of the Roller Bearing Assembly 3B 5 Install the lower Retaining Ring 3D from groove of the Planet Gear 3A 6 Repeat steps 1 to 5 for the remaining three Planet Gears 4F This concludes the Output Carrier Subassembly ...

Page 41: ...41 Planetary Final Drive Service Manual Input Coupling Subassembly Continued on Next Page ...

Page 42: ...ese next steps 1 Install the Retaining Ring 22 18C into Coupling 9 18A NOTE Skip steps 2 and 3 for Assembly with Mount Adaptor 2 Install the Retaining Ring 18B from retaining ring groove of Coupling 9 18A This concludes the Input Coupling Subassembly ...

Page 43: ...43 Final Drive Service Manual Housing Spindle Subassembly Continued on Next Page ...

Page 44: ...r of Spindle 1A 9 Slide the inner sleeve out of the Seal assembly 1B Insert Inner Sleeve 1B into seal press tool T219294 Being careful not to scratch the Seal 1B surface Place the seal press tool with Seal 1B on to the Spindle 1A Press seal tool with inner Sleeve 1B on to spindle 1A When the Seal 1B flange makes contact with the Spindle 1A flange the Seal 1B is fully seated With clean rag wipe off...

Page 45: ...AL ASSEMBLY 15 Install Cover subassembly using twenty Bolts 27 16 Turn unit over onto its side and plug brake port in Spindle 1A with Pipe Plug 1U if unit does not have brakes 17 Perform LEAK TEST as per instructions on page 9 18 Turn unit over onto Spindle 1A end and remove Cover subassembly 19 Remove Bearing Nut 1E 20 Apply Loctite 263 to first full threads of Spindle 1A and full threads of Bear...

Page 46: ...46 Planetary Final Drive Service Manual Main Assembly Continued on Next Page ...

Page 47: ...st immediately press bearing the rest of the way on using T174699 pressing tool Keep Planet Gears Sets 3A together during assembly One set per each Spindle 1A NOTE Do not beat planet gears onto spindle posts with bar stock or hammer CAUTION Safety glasses must be worn during these next steps 7 Install Retaining Ring 3C on each planet post of Spindle 1A 8 Install the O ring 5 from between the Housi...

Page 48: ...48 Continued on Next Page ...

Page 49: ...p Ring 18I to completely seat it in the groove This ensures that the piston will not cut the Back up Ring 18I during assembly 21 Install large Backup Ring 18H in groove on Piston 18A 22 Grease and install large O Ring 18F in the large diameter groove towards the small Diameter end of Piston 18A on top of the large Backup Ring 18H 23 Press Piston 18A into Spindle 1A until the small end contacts the...

Page 50: ...d onto Adaptor Mount 24 30 Install Thrust Washer 30 onto Adaptor Mount 24 31 Install Adaptor Mount 24 onto Spindle 1A using Bolts 26 32 The unit should now be leak and roll checked as per instructions on page 8 9 10 The motor can be reinstalled into the gearbox for the leak check to seal it off and the unit pressurized through a pipe plug hole on the cover This concludes the Main assembly ...

Page 51: ...51 Planetary Final Drive Service Manual Assembly Drawing ...

Page 52: ...EXTERNAL RETAINING RING 3D 8 INTERNAL RETAINING RING 4 6 1 RING GEAR 5 2 O RING 6 1 COVER SUB ASSEMBLY 6A 12 1 COVER PLATE 7 1 INPUT SHAFT 8 1 CARRIER SUB ASSEMBLY 8A 1 CARRIER 8B 12 THRUST WASHER 8C 54 BEARING NEEDLE 8D 3 PLANET SHAFT 8E 3 GROOVE PIN 8F 3 PLANET GEAR 9 1 COUPLING 10 1 THRUST WASHER 11 1 THRUST WASHER 12 1 SUN GEAR 15 4 DOWEL PIN 18 1 PISTON BRAKE SUB ASSEMBLY 18A 1 PISTON BRAKE 1...

Page 53: ... 1 BACKUP RING 18I 1 BACKUP RING 18J 1 SPACER 18R SPRING 22 1 PLASTIC PLUG 21B 1 EXTERNAL RETAINING RING 22 1 RETAINING RING 24 1 ADAPTOR MOUNT 25 1 O RING 26 2 DRIVE SCREW 27 13 20 BOLT 30 1 THRUST WASHER NOTE For Spring 18R quantity refer to the Brake Chart under Brake Test on page 6 ...

Page 54: ...54 Planetary Final Drive Repair Instructions Assembly Tools T163056 ROLL CHECKING FIXTURE ...

Page 55: ...55 T180149 LEAK TEST ADAPTER ...

Page 56: ...56 T184729 LEAK TEST ADAPTER ...

Page 57: ...57 T182969 ROLL CHECK TOOL ...

Page 58: ...58 T198122 BRAKE ASSEMBLY CONCENTRICITY ...

Page 59: ...59 T201476 LEAK TEST ADAPTER PLATE ...

Page 60: ...60 T176834 ASSEMBLY PRESSING TOOL ...

Page 61: ...61 T176703 BEARING CONE PRESSING TOOL ...

Page 62: ...62 T176285 ASSEMBLY LOCKNUT WRENCH ...

Page 63: ...63 T174699 ASSEMBLY PRESSING TOOL ...

Page 64: ...64 T219294 SEAL PRESSING TOOL ...

Page 65: ...65 T214917 SEAL PRESSING TOOL ...

Page 66: ...66 T181663 BRAKE ASSEMBLY CONCENTRICITY FIXTURE ...

Page 67: ...67 T184035 BRAKE ASSEMBLY CONCENTRICITY FIXTURE ...

Page 68: ...68 T188489 BRAKE ASSEMBLY CONCENTRICITY FIXTURE ...

Page 69: ...69 T205279 LEAK TEST ADAPTER PLATE ...

Page 70: ...70 T179926 ASSEMBLY PRESSING TOOL ...

Page 71: ...g facility that includes a full service heat treat department Our philosophy of synchronous engineering is a partnership that matches our best and brightest people with your people to evaluate your unique requirements and develop products and assemblies that meet your needs For more information contact Fairfield Manufacturing Co Inc today Mailing Address Fairfield Manufacturing Co Inc U S 52 South...

Page 72: ...72 Oerlikon Fairfield U S 52 South P O Box 7940 Lafayette IN 47903 USA 765 772 4000 www oerlikon com fairfield ...

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