Usage:
Remove Final Drives And Sprocket Assemblies
START BY:
a. separation of track
NOTE: It is not necessary to drain the oil from the final drives before they are removed.
1. Remove the guard below the engine. Weight is: 943 - 66 kg (146 lb.), 953 - 75 kg (166 lb.).
| NOTICE |
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Earlier model loaders used a hand pump mounted in the cab to release the parking brake pressure. The later model loaders have eliminated the cab mounted hand pump as well as the bleed tubes and U-tubes which were located in the engine compartment. FT1845 Brake Release Group is available as a replacement for the earlier used hand pump. See Service Magazine, April 16, 1984, for instructions on construction and usage of the FT1845 Brake Release Group. With both the earlier and later loaders, be sure all oil pressure in the parking brake is released before parking brake oil lines are disconnected. |
2. Disconnect parking brake oil lines (1) from elbows (2), and install plugs in the oil lines. Remove elbows (2). Remove the bolts from the clips that hold the oil lines to the frame.
3. Remove bolts (3) and lock (4) that hold spanner nut (5) in place. Use tool (A) to remove spanner nut (5) from the oil manifold for the parking brake. If a replacement is necessary, remove the O-ring seal on the back of the spanner nut.
4. Remove bolts (6) that hold the bottom of the final drive case to the frame.
5. Remove two bolts (7), and install two 5/8"-11 NC guide bolts at least 6 in. long.
6. Remove one or two sprocket segments to get clearance for track roller (8) during removal of the final drive.
7. Fasten a strap and lift truck or hoist to the final drive as shown.
8. Remove the remainder of the bolts that hold the final drive case to the frame, and install two 5/8"-11 NC forcing screws (9).
NOTE: When the final drive is removed, oil will slowly drain from the case of the track motor out the opening for the drive shaft for the final drive. If a plug is not put in the opening, all the oil in the hydrostatic power control unit will drain out through the case drain for the track motor. A plug approximately 53.975 mm (2.125 in.) in diameter will be needed to fill the hole.
9. Use forcing screws (9) to push the final drive case away from the frame. Remove the final drive. Weight is: 943 - 359 kg (785 lb.), 953 - 495 kg (1100 lb.).
10. Install a plug in the track motor to stop the loss of oil.
Install Final Drives And Sprocket Assemblies
1. Put 7M7260 Liquid Gasket Material on the surfaces of the final drive case and frame that make contact.
2. Be sure O-ring seal (3) is in position on the parking brake housing and the O-ring seal is in position on the drive shaft for the final drive. Put clean oil on the O-ring seals. Remove the plug from opening (2) in the track motor.
3. Fasten a strap and lift truck or hoist to final drive (1). Put the final drive in position on the guide pins, and slide into place. Weight is: 943 - 359 kg (785 lb.), 953 - 495 kg (1100 lb.). Be careful not to damage the splines on the drive shaft for the final drive. Install the bolts that hold the final drive in place.
4. Remove the two guide pins, and install the remainder of bolts (4). Tighten bolts (4) to a torque of 270 ± 25 N·m (200 ± 18 lb.ft.).
5. Put 5P960 General Purpose Grease on the bolt threads and nut face of the bolts and nuts for sprocket segments (5). Put sprocket segments (5) in position on the sprocket hub, and install the bolts and nuts that hold it in place. Tighten the bolts to a torque of 175 ± 40 N·m (130 ± 30 lb.ft.); then tighten the bolts 120° ± 5° more.
6. Install bolts (7), and tighten to a torque of 475 ± 50 N·m (350 ± 37 lb.ft.).
7. If a replacement of the O-ring seal on spanner nut (6) was made, use 5H2471 Cement to hold the new O-ring seal in place. Put clean oil on the O-ring seal, and install spanner nut (6) on the oil manifold for the parking brake. Use tool (A) to tighten the spanner nut to a torque of 25 ± 7 N·m (18 ± 5 lb.ft.); then to the next position where the lock can be installed. Put the lock in position, and install the two bolts that hold it in place.
8. Install elbows (9) in the oil manifold as shown. Connect the brake bleed line and brake pressure lines to the elbows as shown. The brake bleed lines go to the top elbow and the brake pressure lines to the bottom elbow. Install the bolts in clips (8) to hold the brake oil lines to the frame.
9. Be sure the drain plug is in place. Fill the final drive with oil to the correct level.
| NOTICE |
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To put the correct amount of oil in the final drive, it will be necessary to give enough time for the oil to move through the final drive housing into the rear compartment. |
END BY:
a. connection of track
b. remove air from track brakes *
*For procedure to remove air from track brakes, see Testing And Adjusting.
Disassemble Final Drives And Sprocket Assemblies
START BY:
a. remove final drives and sprocket assemblies
b. remove track brakes
1. Drain the oil from the final drive.
2. On a 953 final drive, remove shaft (1). Remove six bolts and retainer (2). On a 943 final drive there can be shims under retainer (2).
3. Fasten a hoist to the final drive, and put the final drive in position on tooling (A), and install four bolts and nuts to hold the final drive in place. Weight is: 943 - 359 kg (785 lb.), 953 - 495 kg (1100 lb.).
4. Remove the bolts that hold cover (3) in place, and use two 3/8"-16 NC forcing screws to remove the cover.
5. Use tooling (B) to remove button (4) (if applicable) from the cover if a replacement is necessary.
6. Install a 3/8"-16 NC forged eyebolt in shaft (sun gear) (5), and remove the shaft.
7. Remove the bolts that hold planet carrier (7) to the sprocket hub, and install two 5/8"-11 NC forcing screws (6) to loosen the planet carrier.
8. Install two 3/8"-16 NC forged eyebolts in the planet carrier, and fasten a hoist. Remove planet carrier (7). Weight is: 943 - 52 kg (115 lb.), 953 - 79 kg (175 lb.).
9. Bend the locks away from bolts (8). Remove bolts (8), the locks and retainers (9) from the planet carrier.
10. Use tooling (C) to remove planet shafts (10) from the planet carrier.
| NOTICE |
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The bearings in planet gears (11) are loose and will fall out of the gears. |
11. Move planet gears (11) to the center of the planet carrier one at a time, and remove them.
12. Remove bearings (12) from the planet gears.
13. Remove plate (13) and the shim(s) from the spindle.
NOTE: Any time plate (13) is removed new bolts must be used during final assembly.
14. Use pry bars to loosen ring gear (14) and the ring gear hub on the spindle. Use two men to remove ring gear (14) and the hub as a unit. Weight is: 943 - 23 kg (50 lb.), 953 - 32 kg (70 lb.).
15. Remove ring (15) from ring gear (14). Remove hub (16) from the ring gear.
16. Install tooling (D) on the sprocket hub and fasten a hoist. Remove sprocket hub (19). Weight is: 943 - 84 kg (185 lb.), 953 - 117 kg (260 lb.). Remove bearing cone (17) and O-ring seal (18) from the sprocket hub.
17. Carefully remove Duo-Cone seals (20) from the sprocket hub and spindle. Be careful not to damage the contact surfaces of the seals. Inspect the rubber seals of the Duo-Cone seals for any cuts or damage.
18. Remove bearing cups (21) from the sprocket hub.
19. Use tooling (E) to remove bearing cone (22) from the spindle.
20. Remove bolts (23) that hold the spindle to the final drive case. Put marks on the spindle and case as to the location of the spindle on the case. The spindle must be installed in the same position on the case because there are holes in the spindle that let oil move through the final drive case.
21. Fasten tooling (D) to spindle (24), and fasten a hoist. Install two 5/8"-11 NC forcing screws in the spindle, and remove the spindle. Weight is: 943 - 36 kg (80 lb.), 953 - 68 kg (150 lb.).
22. Use tooling (F) to remove the bearing race (943) or bearing (25) (953) from the spindle. Remove O-ring seal (26) from the spindle.
23. Remove gear (27) from the final drive case. On a 953 final drive case, two 1/2"-13 NC forged eyebolts can be installed in gear (27) to make the removal of the gear easier.
(Earlier 943)
| NOTICE |
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Bearing (28) (earlier 943) or bearing race (30) (later 943 and 953) can be removed as shown in Steps 24, 25 or 26. Remove the bearing or bearing race only if a replacement is necessary because the bearing or bearing race will be damaged when it is removed. |
24. Use tooling (G) to remove bearing (28).
(Earlier 943)
25. Install two 3/8"-16 NC forcings screws (29) in the back side of gear (27) (943 earlier), and use the forcing screws to push the bearing off the gear.
(Later 943 and 953)
26. On a 943 (later) and the 953 final drive gear it will be necessary to heat bearing race (30) for removal.
| NOTICE |
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Do not let pinion (32) fall out of the case when it is removed. |
27. Install a 5/8"-11 NC forcing screw (31) in the final drive case, and use the forcing screw to push pinion (32) out of the case.
28. Use tooling (B) to remove thrust plate (33) from the case if a replacement is necessary.
943
953
29. On a 943 final drive remove bolt (35) and the washer from shaft (34). Remove shaft (34) from the pinion. Remove the O-ring seal from the shaft.
30. Use tooling (H) and a press to remove the bearing cones from the pinion.
31. Remove final drive case (36) from tooling (A), and turn it up side down. Weight is: 943 - 72 kg (160 lb.), 953 - 90 kg (200 lb.).
32. Use tooling (J) to remove the bearing cup for the pinion bearing from final drive case (36).
For more information see Bearing Damage Causes And Corrections, Form No. FE036004, And Analyzing Gear Failures, Form No. FEG45134.
Assemble Final Drives And Sprocket Assemblies
1. Use a brass bar and hammer to install thrust plate (1) with the oil grooves up as showns.
| NOTICE |
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All bearing cups and cones must be installed tightly against their seats to get a correct bearing preload. |
2. Heat bearing cones (4) to a maximum temperature to 138°C (280°F). Do not heat the bearing longer than 8 hours. Install bearing cones (4) on pinion (5). Use a press to push bearing cones (4) tightly against their seats after the bearing cones have become cool.
NOTE: Steps 3 and 4 are for 943 drives only.
3. Install O-ring seal (2) on shaft (3).
4. Put shaft (3) in position in pinion (5), and install bolt and washer (6) to hold the shaft in the pinion.
5. Use tooling (B) to install the bearing cup for the pinion in the final drive case.
6. Put clean oil on the bearing cones on the pinion. Install pinion (5) in the final drive case. Put the bearing cup and retainer (7) in position, and install four 3/8"-16 NC bolts 1 1/2 in. long in the retainer to push the bearing cup far enough into the final drive case to install the correct bolts. Remove the 1 1/2in. long bolts, and install the correct bolts in the retainer. Tighten the bolts and be sure retainer (7) is tight against the final drive case.
7. Check pinion (5) for end play, and measure the torque needed to turn the pinion. If the end play is not more than 0.5 mm (.02 in.), and the torque is 1.1 N·m (10 lb.in.) or less, go to Step 8. If the end play is more than 0.5 mm (.02 in.), and retainer (7) is tight against the case, it will be necessary to install new parts. If the rotation torque is more than 1.1 N·m (10 lb.in.), install one 8G588 Shim under retainer (7), and check the torque again. Install only one shim at a time, and do not use more than three shims. If the torque is too high with three shims installed, and there is not foreign material under the cups, cones, or retainer, it will be necessary to install new parts.
8. Turn the final drive case over, and put it in position on tooling (A). Use four bolts and nuts to hold the final drive case in position on tooling (A). Weight is: 943 - 72 kg (160 lb.), 953 - 90 kg (200 lb.).
Earlier 943
Later 943 And 953
9. Heat the bearing (earlier 943) or bearing race (later 943 or 953) for gear (8) to a maximum temperature of 120°C (248°F). Do not heat the bearing longer than 8 hours. Install the bearing (earlier 943) or bearing race (later 943 or 953) on gear (8). On an earlier 943, the side of the bearing with the larger radius on the inside diameter must be toward the shoulder on the gear. After the bearing has become cool, use a press to push the bearing tightly against its seat. Put clean oil on the bearing.
Later 943 and 953
10. Install gear (8) in the final drive case. On a later 943 or 953 final drive, two 1/2"-13 NC forged eyebolts can be installed in gear (8) to make the installation of the gear easier.
Earlier 943
Later 943 And 953
11. Lower the temperature of race (9) (earlier 943) or bearing (9) (later 943 or 953), and install the spindle. Be sure the race or bearing is tight against its seat. Install O-ring seal (10) on the spindle.
12. Install two 5/8"-11 NC guide bolts (12), at least 6 in. long, in the final drive case. Fasten tooling (D) and a hoist to spindle (11). Install the spindle in its original position on the final drive case. The spindle must be installed in the same position on the case because there are holes in the spindle that let oil move through the final drive case. Weight of the spindle is: 943 - 36 kg (80 lb.), 953 - 68 kg (150 lb.).
13. Put 9S3263 Thread Lock on the threads of bolt (14), and install the bolt in the hole over the pinion. The 9S3263 Thread Lock will prevent oil leakage at bolt (14). Install the remainder of the bolts that hold the spindle to the final drive case, and tighten all the bolts to a torque of 270 ± 25 N·m (200 ± 18 lb.ft.).
14. Heat bearing cone (13) to a maximum temperature of 120°C (248°F). Do not heat the bearing longer than 8 hours. Install bearing cone (13) on the spindle. After the bearing cone has become cool, push the bearing cone tightly against its seat. Use a thickness gauge or check for an air gap to be sure the bearing is against its seat. Put clean oil on the bearing cone.
15. Lower the temperature of bearing cups (15), and install the bearing cups in the sprocket hub. Use a thickness gauge to be sure the bearing cups are against their seats.
16. Use tool (C) to install Duo-Cone seals (16) in the sprocket hub and spindle.
NOTE: The rubber seals and all surfaces that make contact with the seals must be clean and dry. After installation of the seals, put oil on the contact surfaces of the metal seals.
17. Fasten tooling (D) and a hoist to the sprocket hub. Put the sprocket hub in position on the spindle. Weight is 943 - 84 kg (185 lb.), 953 - 118 kg (260 lb.).
18. Install the outer bearing cone on the spindle, and put clean oil on the bearing cone.
19. Put hub (17) in position in ring gear (19) as shown, and install ring (18) to hold the ring gear and hub together.
20. Use two men to put ring gear (19) and the hub in position on the spindle. Weight is: 943 - 23 kg (50 lb.), 953 - 32 kg (70 lb.).
NOTE: Use new bolts in retainer (20) any time the final drive is disassembled.
21. Put a preload on the sprocket hub bearings as follows:
a. Put retainer (20) in position on the spindle without shims, and install three old bolts at even intervals in the retainer.
b. Turn the sprocket hub at 10 ± 5 rpm during the adjustment procedure.
c. Gradually tighten the three bolts in the retainer to a torque of 38 ± 1 N·m (28 ± 1 lb.ft.) to remove the end play in the bearings.
d. Separately loosen and again tighten each bolt in the retainer until the bolt is against (seats) the retainer plate.
3. Tighten the three bolts to a torque of: 943 - 12 ± 2 N·m (108 ± 18 lb.in.), 953 - 22 ± 5 N·m (193 ± 45 lb.in.).
f. Measure the shim gap at the three bolts as close to the bolts as possible. Remove the retainer.
g. Install shims (21) with a total thickness the same as the average gap measured in Step F + 0.00 - 0.10 mm (+ 0.000 - 0.004 in.). Put retainer (20) in position, and install new bolts to hold the retainer and shims in place.
h. Turn the sprocket hub at 10 ± 5 rpm while the bolts in the retainer are tightened. Tighten the bolts in a sequence around the retainer to 10 ± 1 N·m (7 ± 1 lb.ft.), then to 50 ± 5 N·m (37 ± 4 lb.ft.), then to 135 ± 15 N·m (100 ± 11 lb.ft.).
22. Install the bearings in planet gears (22). Put all three planet gears (22) in position in the planet carrier.
23. Fasten tooling (D) and a hoist to the planet carrier. Put the planet carrier in position in a press with supports (24) under the bosses for planet shafts (23). Weight of the planet carrier is: 943 - 52 kg (115 lb.), 953 - 79 kg (175 lb.). Start planet shaft (23) in the planet gear with the groove in the shaft up as shown.
24. Use the press to push planet shaft (23) through the planet gears until the grooves in the top of the shafts are even with the planet carrier as shown. Be sure to put a support under the boss on the planet carrier while the planet shaft is pushed through the planet gear.
25. Put plates (26) and locks (25) in position on the planet carrier, and install the bolts that hold them in place.
26. Install O-ring seal (28) on the sprocket hub.
27. Turn the planet carrier over, and install two 3/8"-16 NC forged eyebolts (27). Fasten a hoist to the planet carrier, and put the planet carrier in position on the sprocket hub. Weight is: 943 - 52 kg (115 lb.), 953 - 79 kg (175 lb.). Install the bolts that hold the planet carrier to the sprocket hub, and tighten to a torque of 200 ± 25 N·m (150 ± 20 lb.ft.).
28. Install a 3/8"-16 NC forged eyebolt in shaft (sun gear) (29), and install the shaft (sun gear) in the planet.
29. Use tooling (B) to install button (30) in cover (31).
30. Use 7M7260 Liquid Gasket Material as a seal for cover (31) and the planet carrier. Put cover (31) in position on the planet carrier, and install the bolts that hold it in place. Put 9S3263 Thread Lock on the threads of the bolts that hold the cover in place.
31. Fasten a hoist, and remove the final drive from tooling (A). Weight is: 943 - 359 kg (785 lb.), 953 - 495 kg (1100 lb.).
END BY:
a. install track brakes
b. install final drives and sprocket assemblies