Torque-Hub® Planetary Final Drive W3A Series Service Manual
Contents
1. Cluster Gear After the Planet Shaft is removed the roll pin should be driven out of the Planet Shaft WARNING When rebuilding the unit the O rings and Retaining Rings should always be replaced Main Assembly Procedure 1 Using an arbor type press if available if not a hammer may be used install the wheel studs The hub flange should be supported from the underside during this operation Note Wheel studs are optional N Using an arbor type press if available press Bearing Cups with large inside diameters facing out into Hub counterbores Cup JM716610 will go into small end of Hub and Cup JM515610 will go into large end of Hub Place Bearing cone JM7 16649 into Bearing Cup in small end of Hub 4 Press Seal into Hub counterbore with flat metal side facing in Use a flat object to assure that Seal is pressed evenly and is flush with Hub face 5 Lower Hub onto Spindle with large open end up 6 Place Bearing cone JM515649 over end of Spindle and into Bearing Cone 7 Place Bearing Shim over end of Spindle and against Bearing Cone 8 Secure Retaining Ring completely into Spindle groove and against Bearing Shim Be sure that Retaining Ring is entirely in groove Eye protection is to be worn during this operation 9 The pipe plugs are installed in the Hub The use of lub seal is recommended on the pipe plug 10 The disengage spacer and spring are installed into the counterbore of the Spin2. Ring Gear installation The side of the Ring Gear with an X stamped on it should be up The input gear is now installed into the carrier meshing with the small diameter cluster gear The counterbore in the bore of the input gear must be to the outside of this assembly While holding Ring Gear and Cluster Gears in mesh place small side of Cluster Gears into mesh with the Internal Gear On the Ring Gear locate the hole marked X over one of the marked counterbored holes in Hub Note If gears do not mesh easily or Carrier Assembly does not rotate freely then remove the Carrier and Ring Gear and check the Cluster Gear timing Another thrust spacer is installed onto the input shaft 24 After inserting at least one shoulder bolt in the proper location rotate the carrier This is to check freedom of rotation and recheck timing 25 Another thrust washer thrust bearing set is now installed into the counterbore in the face of the carrier 26 Place O ring into cover assembly counterbore Slight stretching may be necessary Use sufficient grease or petroleum jelly to hold in place 27 Place cover assembly on Ring Gear with oil level check plug in cover located approximately 90 from oil fill plug in Hub 28 Locate four shoulder bolts 90 apart into counterbored hole in Hub which were marked in step 17 Torque each bolt to 47 ft Ibs 29 Install grade eight bolts into the remaining eight holes and torq
3. ce Repeat these steps for remaining two Cluster Gears to complete Carrier Sub Assembly Cover Sub Assembly Procedure 1 Screw Pipe Plug into Cover 2 Place O ring into Cover Cap internal groove The Disconnect Rod may be used to push O ring into groove Rod will be held in place by friction from the O ring 3 Slip O ring over Cover Cap and against face 4 Place Cover Cap into Cover with large hole located over Pipe Plug 5 Install two 1 4 x 20 x 3 4 bolts 180 apart and torque to 70 80 in Ibs 6 Place disconnect cap over cover cap with nipple facing out and align with two open holes Secure disconnect cap to cover with two 1 4 x 20 x 3 4 and 70 80 in Ibs on Ln L NAA Pd a LS ad We a a TORQUE w3 HUB IR DRIVE l ee PEOPLE Fura FH cerlikon fairfield Oerlikon Fairfield U S 52 South P O Box 7940 Lafayette IN 47903 USA 765 772 4000 www oerlikon com fairfield
4. cerlikon fairfield Torque Hub Planetary Final Drive W3A Series Service Manual Rev 1 21 13 Introduction This service manual is a step by step quide designed for the customer or shop mechanic who is servicing or repairing a particular model of Torque Hub Final Drive The model covered by this copy of the manual is specified on the cover page Included are 1 assembly and exploded view drawings 2 disassembly procedure 3 main assembly procedure assuming all sub assemblies to be intact 4 sub assembly procedures At the time of printing this manual was complete for the specific Torque Hub model designated However Fairfield Manufacturing Co Inc reserves the right to update and improve its products at any time All specifications and procedures are therefore subject to change without notice Safety 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 gloves should be used when heated components are handled Be especially alert when you see a caution symbol like the one above This symbol indicates that a particular operation could cause personal injury if not performed properly or if certain safety procedures are not followed While every precaution has been taken in the preparation of this document Fairfield Manufacturing Co Inc assumes no liability with respect to the use of the documentation d
5. dle 11 Another spacer and the correct Retaining Ring are installed into the Spindle counterbore and Retaining Ring groove provided Eye protection is to be worn during this operation 12 The internal gear is installed matching the Bore Spline to the Spindle Spline 13 The thrust washer thrust bearing set is installed on the portion of the Spindle which extends into the internal gear 14 The O ring is placed into the counterbore provided in the Hub Slight stretching may be necessary Use sufficient grease or petroleum jelly to hold in place 15 Install retaining ring into input shaft retaining ring groove 16 The input shaft is installed into the spindle The action of the spring should be checked at this point 17 The thrust spacer is installed on the input shaft 18 Locating the four counter reamed holes in the face of the hub mark them for later identification These holes are reamed to accept the shoulder bolts 19 Place Carrier Assembly on a flat surface with the large gears up and positioned as shown Find the punch marked tooth on each large gear and locate at 12 o clock straight up from each planet pin Marked tooth will be located just under the Carrier on upper position two gears punchmarks at 12 o clock 20 With shoulder side of Ring Gear facing down 21 23 place Ring Gear over into mesh with large gears Be sure that punch marks remain in correct location during
6. escribed 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 Disassembly Procedure 1 Loosen all 12 Cover Bolts and drain the oil from the unit 2 Remove the 12 Cover Bolts and lift off the Cover Sub Assembly Discard the O ring Seat from the Cover counterbore 3 Lift out the Carrier Sub Assembly and Thrust Bearing Set A Thrust Washer may stick inside the Cover 4 Pry the Ring Gear loose and remove it Discard the O ring Seal from the Hub counterbore 5 Remove the Input Shaft the Input Gear and the Thrust Spacers that are on the Input Shaft 6 Lift out the Internal Gear and Thrust Bearing Set A Thrust Washer may stick to the bottom of the Carrier 7 Remove the Retaining Ring from the Spindle and discard then lift the hub off the Spindle Eye protection is to be worn during this operation 8 The inside Bearing Cone and the Bearing Shim can now be removed 9 The Seal can be pried out of the Hub with a screw driver or pry bar This will also allow the outside Bearing to be removed Note If bearing replacement is necessary the Bearing Cups can be removed with a slide hammer puller or driven out with a punch 10 To remove the Cluster Gears from the Carrier drive the anti roll pin into the Planet Shaft of the
7. ue all bolts to 47 ft lbs Use the 180 to 90 method in torquing all bolts 30 Place Coupling into the Spindle and onto the Input Shaft Note W3C units must have one external and one internal Snap Ring installed All units with a X on the end of the model number must have two internal Snap Rings with a spacer between them installed in the Coupling This completes the assembly The unit must be filled one half full of EP 90 lubricant before operation Carrier Sub Assembly Procedure 1 Apply a coat of grease or petroleum jelly to Cluster Gear bore 2 Place 14 Needle Rollers into Cluster Gear bore 3 Place Spacer washer into opposite side of Cluster Gear and against Needle Rollers 4 Place second set of 14 Needle Rollers into Cluster Gear 5 Apply grease or petroleum jelly to the tang side of two Thrust Washers Place Thrust Washers against bosses in Carrier with washer tang fitting into slot in Carrier outside diameter Note Some old style Carriers will not have slots and tangs should be located inside boss relief 6 While keeping Thrust Washers in place slide Cluster Gear into Carrier with the larger gear on the side with the small pin hole 7 Line up Cluster Gear and Thrust Washers with hole in Carrier and slide Planet Shaft through Line up chamfered side of hole in Planet Shaft with pin hole in Carrier 8 Drive Anti Roll Pin flush into Carrier hole thereby locking Planet Shaft into pla
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