Massey Ferguson MF 50 Factory Service & Work Shop Manual

MASSEY -FERGUSON GROUP IV - SECTION A - PART 2 PART2. FRONT AXLE ASSEMBLIES MF 50 AND 65 TRACTORS INDEX Page Servicing the Wide FrontAxle Assemblies. . . . . . .. 1 Servicing the Si~gle Wheel Front Axle. ......... 7 Servicing the TwinWheel Front Axle........... 8 SERVICINGMF 50 &65 MULTI-PUR POSE, STANDARD, HI-ARCH,AND UTILITY FRONT AXLE ASSEMBLIES Similiarities between front axle assemblies of the Multi-Purpose, Standard, Hi-Arch and Utility description permit servicing procedures of these assemblies to be combined and dis- cussed as one. Single wheel front axle assemblies and twin wheel front axle assemblies each deserve sepa- rate discussions of servicing procedures. The procedures concerning axles of this type will include servicing the front pedestal and support assemblies. Consult the Parts Book for information re- garding the inter-change features of parts. REMOVING FRONT AXLE AS A UNIT Front axle assemblies of this description are removed as a unit when complete disassembly is not necessary. Support the tractor with front wheel slightly touching the ground, refer to Fig. 1, and remove: 1. Lower grill panel. 2. Lower steering arm, No.3, from pedestal shaft. 3. Thrust plate, No. 20, and shims from end of front pivot pin. 4. Front pivot support. 5. Front axle assembly by rolling the unit forward and out from tractor (a floor jack supporting the front axle center member facili- tates easy handling when following this procedure). See Fig. 5. Install the assembly as a unit by reversing the procedures for removing. REMOVING FRONT AXLE TO DISASSEMBLE When front axles of this description are to be completely disassembled, remove the assemblies as follows: 1. Slightly loosen the wheel lug nuts. 2. Support tractor with front wheels clearing the ground. 3. . Remove: a. Front wheels. b. Lower grill panel. c. Grease fittings. d. Tie rods ends, Nos. 1 and 9, from spindle steering arms, Nos. 10 and 27. Fig. 1. e. Tie rods end No.6, from main steering arm, No.3. f. Main steering arm from pedestal shaft. g. Both R.H. and L.H. axle extension assemblies, Nos. 15 and 25, Fig. 1, (if so equip- ped). h. Pivot thrust plate, No. 20, and shims, No. 21. NOTE: Save the shims. 1

MASSEY -FERGUSON FRONT AXL E & STEERING GROUP IV - SECTION A- PART 2 Fig. 3 _ MF 65 Utility Front Axle Assembly Nomenclature. 1. Tie Rod End 2. Spindle Steering Arm 3. Felt Dust Seol 4. Spindle Bushing 5. Spindle Bushing 6. Thrust Bearing 7. Woodruff Key 8. Spindle Assembly 9. Tie Rod Assembly 10. Nut 11. Dust Seal 12. Front Axle Assembly 13. Main Steering Arm 14. Dust Seal 15. Nut 16. Dust Seal 17. Tie Rod Assembly 18. Nut 19. Spindle Steering Arm 20. Dust Seal 21. Felt Dust Seal 22. Spindle Bushing 23. Spindle Bushing 24. Thrust Bearing 25. Woodruff Key 26. Spindle Assembly 27. Pivot Support Assembly 28. Pivot Bushing 29. Shim Pock 30. Thrust Plate 4

GROUP IV - SECTION A - PART 2 MASSEY -FERGUSON MF 50 & 65 FRONT AXLE & STEERING 1. Tie Rod End 2. Tie Rod Assembly 3. Main Steering Arm 4. DustSeal 5. Nut 6. DustSeal 7. Tie RodAssembly 8. SpindleSteeringArm 9. Nut Fig. 4 - MF 50 Multi-Purpose Front Axle Assembly Nomenclature 10. Dust Seal 19. Nut 11. Dust Seal 20. Spindle Steering Arm 12. Spindle Bushing 21. Dust Seal 13. Grease Fitting 22. Du..t Seal 14. Spindle Bushing 23. Spindle Bushing 15. Thrust Bearing 24. Grease Fitting 16. WoodruffKey 25. Spindle Bushing 17. Spindle Assembly 26. Thrust Bearing 18. Front Axle 27. WoodruffKey 28. Spindle Assembly 29. Thrust Plate 30. Shim Pock 31. Pivot Bushing 32. Grease Fitting 33. Axle Support Assembly entering through grease fitting hole, to drill a spot in the bore 1/64" deep. When installing the bushing, line up the grease holes and insert a long punch to stake bushing into drill spot. Replacement pivot bushings are pre-sized and do not require reaming when installed carefully with the proper tool. Spindle bu~hings are renewable but require sizing after installation. 5

FRONT AXLE & STEERING MASSEY -FERGUSON GROUP IV - SECTION A - PART 2 Fig. 5 - Removing Wide Front Axle.Assembly. Tie rod ends are not adjustable for wear. Recommen~ed toe-in adjustment is 0-1/4 inch. End-play adjustment is 0.002-0.008 inch between support housing front face and front pivot bracket rear face. ASSEMBLING THE AXLE 1. Install: (Refer to Fig. 1). a. Bearing, No. 17, to spindle, No. 19. b. Spindle bushings, Nos. 14 & 16, and ream to size. c. Spindle through axle spindle tube, No. 15. d. Dust seal, No. 13. e. Woodruff key, No. 18, to spindle. f. Spindle steering arm, No. 10, to spindle. g. Tighten spindle, bolt arm clamp. h. Repeat procedure for spindle assembly on other side. INSTALLING THE AXLE 1. Install: (Refer to Fig. 1). a. Rear pivot bushing, making certain grease holes are in alignment. b. Axle main center-member, No. 24, by carefully inserting the rear pivot pin of center- member into support casting pivot pin bore. 6 c. Steering arm, No.3, onto pedestal shaft and tighten clamp. d. Front pivot bushing, No. 22, in front pivot bracket, No. 23. e. Front pivot bracket to front pivot pin and attach to support casting. f. Tie rods, No.6, to main steering arm, No.3. g. Axle extensions, Nos. 15 and 25, to main center-member. h. Tie rods Nos. 1 and 9, to spindle stee-ring arms Nos. 10 and 27. i. Shims, No. 21, (which are available in 0.002,0.005 and 0.010 inch thickness) to the end of front pivot pin and secure with thrust plate, No. 20. NOTE: End-Play shuuld be 0.002-0.008 inch between Pivot bracket and center- member. j. Wheels. k. Lower grill panel. 1. Grease fittings. 2. Lubricate all grease fittings. 3. Adjust toe-in 0-1/4 inch. .... ~_~7 ~ . Fig. 6 - Adjusting Toe-In ADJUSTING THE TOE-IN To adjust the toe-in of all wide front axle models, loosen the right tie rod set screw at the outer end and the clamp bolt at the inner end. Turn the tube assembly, No.2, Fig. 1, in (or out) to obtain the desired toe-in. See Fig. 6.

GROUP IV - SECTION A - PART 2 MASSEY-FERGUSON MF 50 & 65 FRONT AXLE & STEERING The toe-in is measured between the center tire ribs (at hub height) at both front and rear. Proper toe-in is obtained when the distance across the front is 0 to 1/4 inch less than the distance across the back. See Fig. 7. Fig. 7 - Measuring Toe-In SERVICING THE ROW CROP SINGLE WHEEL FRONT AXLE REMOVING To remove the single wheel fork axle assembly, proceed according to the following instructions, and refer to Fig. 8. 1. Support the tractor so that front wheel barely touches the ground, and then remove: a. Lower grill panel. b. Sheet metal dust cap, No 1. c. Thrust plate, No.2, by removing the cap screws. d. Shims, No.3. e. Steering arm, No. 24, by working through opening in support casting, and loosening clamp bolt retaining the arm to wheel fork. 2. Carefully raise front end of tractor, while at the same time, withdrawing the wheel fork from below. See Fig. 9. NOTE: D:J not permit wheel fork shaft to become cocked out of line while removing. 3. Your purpose mayor may not require removal of wheel; if it should be required, then do so as the first step of removal, refer to Group IV, Section B, Part 4 for instructions on removing wheel. 4. Remove the front axle support, No.6, by removing the six cap screws. Fig. 8 - Single Front WheelAxle Nomenclature 1. Dust Cap 2. Thrust Plate 3. Shim Pack 4. Needle Bearing 5. Oil Seal 6. Front Support Assembly 7. Oil Seal 8. Needle Bearing 9. Upper Bearing Race 10. Thrust Bearing 11. Lower Bearing Race 12. Oil Seal 13. Yoke Assembly 14. Castellated Nut 15. Eccentric Washer 16. Cotter Pin 17. Front Axle Shaft 18. Eccentric Washer 19. Castellated Nut 20. Cotter Pin 21. Arm Link Assembly 22. Dust Seals 23. Spindle Arm 24. Main Steering Arm DISASSEMBLING Remove: (Refer to Fig. 8). 1. The upper needle bearing, No.4, from support casting No.6. 2. Oil seal, No.5, from support casting. 3. Oil seal, No.7, from support casting.

FRONT AXLE & STEERING MASSEY -FERGUSON GROUP IV - SECTION A - PART 2 4. Lower needle bearing, No.8, from fork shalt, No. 13. 5. Bearing race, No.9, from fork shaft. 6. Needle thrust bearing, No. 10, from fork shaft. 7. Bearing race, No. 11, from fork shaft. 8. Oil Seal, No. 12. Fig. 9 - RemovingSingle Front Wheel Axle Assembly INSPECTING Clean all parts thoroughly; examine needle bearings and the needle thrust bearing. Replace new parts and oil seals if necessary. ASSEMBLING AND INSTALLING 1. To assemble and install the wheel fork, simply reverse the steps of the disassembly procedure. A blind spline on the wheel fork and the steering arm will facilitate correct alignment of the two parts. 2. Adjust the up and down end-play of the wheel. fork to 0.002-0.008 inch measuring clearance between lower face of support casting and upper face of wheel fork. Shims provide for this adjustment. 3. Adjust the front wheel (which has a taper roller bearing) to have a slight rotational drag. 8 Fig. 10 - Twin Front Wheel Axle Nomenclature 1. Cap Screw 2. Lip Washer 3. Flat Washer 4. Spindle Arm 5. Arm Link Assembly 6. Dust Seals 7. Steering Arm D. Nut 9. Front Support Assembly 10. Oil Seal 11. Upper Bearing Cone 12. Upper Bearing Cup 13. Pedestal Housing 14. Lower Bearing Cup 15. Lower Bearing Cone 16. Oil Seal 17. Spindle Shalt 18. Shalt Key 19. Front Spindle Assembly 20. Castellated Nut 21. Cotter Pin 4. Lubricate the assembly thoroughly. NOTE: Always press or drive a needle bearing from the lettered side of bearing. SERVICING ROW CROP TWIN WHEEL FRONT AXLES REMOVING To remove the twin wheel axle, proceed as follows: 1. Support the tractor with front wheels touching the ground (complete disassembly is more easily accomplished when wheels are removed). 2. Remove: (Refer to Fig. 10). a. Lower grill panel. b. Cap screw, No.1, after unlocking lip washer, No.2.

GROUP IV - SECTION A - PART 2 MASSEY -FERGUSON MF 50 & 65 FRONT AXLE & STEERING c. Flat washer, No.3. d. Steering arm, No.7, working through support casting. 3. Carefully raise tractor, and at the same time, withdraw from below, the spindle shaft, No. 17, axle ,No. 19, and wheels as an assembly. (See Fig. 11). 4. Remove: a. Lower pedestal assembly, No. 13, from support casting, No.9. b. Front axle support, No.9. Fig. 11 - RemovingTwin Front Wheel Axle Assembly DISASSEMBLING Remove: (Refer to Fig. 10) 1. Oil seals, Nos. 10 and 16, from pedestal, No. 13. 2. Upper and lower bearing cones, Nos.11 and 15, from pedestal. 3. Upper and lower bearing cups, Nos. 12 and 14, from pedestal. 4. Cotter pin and castellated nut, No. 20, from spindle shaft, No. 17. 5. Axle, No. 19 and key, No. 18, from spindle shaft. INSPECTION Clean all parts thoroughly and examine for wear. Replace new parts and oil seals if necessary. ASSEMBLING AND INSTALLING 1. Reverse the disassembly procedures and tighten cap screw No.1, Fig. 10 until all end- play is removed from spindle, leaving a slight drag on the bearings. 2. Blind splines on the lower spindle shaft in the steering arm provide for a correct installation. See Group IV, Section B, Part 4 for wheel and hub information. NOTE: When assembling, install new oil seals, and lightly grease the sealing surfaces. Rotate the shaft as it passes through seals. 3. Lubricate the assembly thoroughly.

Massey Ferguson MF 50 Factory Service & Work Shop Manual

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