Usage:
Front Bolster Group (Shown with Tires Removed)
(1) Bolt. (2) Double wheel hub and axle. (3) Nut. (4) Pivot pin. (5) Single wheel hub and axle. (6) Double wheel hub and axle.
Remove Hub and Axle Assemblies
NOTE: These instructions assume that the front bolster group is installed on the machine. If the front bolster group has been removed, follow steps 4, 6, 8, 10, and 11 to remove the hub and axle assemblies.
1. Park the machine on a hard, level surface. Shut the engine off and apply the parking brake.
2. Block at least two of the rear wheels on both sides to ensure that the machine will not roll.
3. Block both sides of the front wheels. This will prevent the hub and axle assemblies from rolling, when removed.
4. Remove one nut (3) and one bolt (1) from each hub and axle assembly (2), (5), and (6).
5. Set two hydraulic jacks under the sides of the machine frame, as shown. Raise or lower the jacks as needed to remove load from pivot pins (4).
6. Drive one pivot pin (4) out of each hub and axle assembly (2), (5), and (6).
7. Raise the frame higher to separate the three hub and axle assemblies from the front bolster group.
8. Roll each hub and axle assembly away from the machine. Weight of each double wheel hub and axle assembly (2) and (6) is approximately 109 kg (240 lbs.). Weight of the single wheel hub and axle assembly (5) is approximately 59 kg (130 lbs.).
9. Set the frame down on two blocks, as shown. Blocks must be under the sides of the frame. Do not block under the center of the machine.
10. Examine pivot pins (4) for damage or excessive wear. Bent, cracked, or badly worn pins must be replaced with new parts.
11. Check mounting holes on hub and axle assemblies, and on primary and secondary bolsters. Look for cracks, enlarged holes, or other structural damage in these components. Repair or replace any damaged items before assembly.
Install Hub and Axle Assemblies
1. Move the single wheel hub and axle assembly (5) into place at the front bolster group. Weight of the hub and axle assembly is approximately 59 kg (130 lbs.).
2. Install pivot pin (4) through mounting holes on the front bolster group, and through hub and axle assembly (5).
3. Secure the pivot pin with bolt (1) and nut (3). Tighten the bolt to 47 N·m (35 lb. ft.).
4. Inspect welding material (7) on each side of the secondary bolster, as shown. Hub and axle assembly (5) must be perpendicular to the secondary bolster, and weld material (7) should prevent hub and axle assembly (5) from pivoting.
5. If welding material (7) is missing or damaged, new welds must be placed on the secondary bolster, as shown above.
NOTE: Welds (7) are used only for the single wheel hub and axle (5). The two double wheel hub and axle assemblies (2) and (6) must be allowed to pivot freely.
6. Move two double wheel hub and axle assemblies (2) and (6) into place at the front bolster group. Weight of each assembly is approximately 109 kg (240 lbs.).
7. Install pivot pins (4) through mounting holes on the front bolster group, and through each hub and axle assembly.
NOTE: If front bolster group is installed on the machine, the frame may have to be jacked up or down slightly to allow insertion of pivot pins (4).
8. Secure each pivot pin with bolt (1) and nut (3). Tighten each bolt to 47 N·m (35 lb. ft.).
9. If the front bolster group is installed on the machine, blocks should be removed from the frame. Lower the machine to the ground.
Disassemble Single Wheel Hub and Axle Assembly
Single Wheel Hub and Axle Components
(1) Roll pin. (2) Axle shaft. (3) Housing. (4) Seal. (5) Bearing cup. (6) Wheel hub. (7) Bearing cup. (8) Hub cap. (9) Bolts and lock washers. (10) Bearing cone. (11) Bearing cone. (12) Washer. (13) Gasket. (14) Slotted nut. (15) Roll pin.
Start By:
a. remove hub and axle assemblies
1. Remove six lug bolts securing the wheel and tire assembly to the hub and axle assembly.
2. Remove the wheel and tire assembly. Weight of the assembly is approximately 36 kg (80 lbs.).
3. Remove three bolts and lock washers (9) securing hub cap (8) to wheel hub (6).
4. Remove hub cap (8) and gasket (13). Discard gasket (13). This must be replaced with a new part during assembly.
5. Drive roll pin (15) out of slotted nut (14) and axle shaft (2).
6. Remove slotted nut (14) and washer (12) from axle shaft.
7. Pull wheel hub (6) straight away from housing (3) and axle shaft (2).
NOTE: Keep bearing cup (7) and cone (11) together. Keep bearing cup (5) and cone (10) together. This will help prevent parts from being mixed during assembly.
8. Remove bearing cone (11) from inside wheel hub (6).
9. Use a suitable puller or driver to remove bearing cups (5) and (7) from inside wheel hub (6).
10. Drive roll pin (1) out of housing (3) and axle shaft (2). Pull the axle shaft out of housing (3).
11. Remove seal (4) and discard. This must be replaced with a new part during assembly.
12. Use a suitable puller or driver to remove bearing cone (10) from axle shaft (2).
13. Clean axle shaft (2) and the inside of wheel hub (6) thoroughly. Inspect these parts for damage, especially in the bearing seat areas. Make sure axle shaft (2) is not bent. Repair or replace any damaged components.
14. Wash bearing cups (5) and (7) and bearing cones (10) and (11) in solvent. Dry the bearings immediately after cleaning. Do not dry bearings by spinning with compressed air.
15. Inspect bearings carefully for damage or excessive wear. If necessary, replace bearing cups and cones in sets only.
16. Clean all other parts and inspect for damage or excessive wear. Repair or replace parts as necessary.
Assemble Single Wheel Hub and Axle Assembly
Single Wheel Hub and Axle Components
(1) Roll pin. (2) Axle shaft. (3) Housing. (4) Seal. (5) Bearing cup. (6) Wheel hub. (7) Bearing cup. (8) Hub cap. (9) Bolts and lock washers. (10) Bearing cone. (11) Bearing cone. (12) Washer. (13) Gasket. (14) Slotted nut. (15) Roll pin.
1. Install axle shaft (2) into housing (3). Adjust the position of the axle shaft to allow insertion of roll pin (1).
2. Secure axle shaft (2) to housing (3) with roll pin (1).
3. Apply a light film of oil to a new seal (4). Install the seal on axle shaft (2). Make sure the flat side of the seal is against housing (3), as shown.
4. Press bearing cone (10) on axle shaft (2), against seal (4) and housing (3). Make sure the bearing cone is seated squarely against housing.
5. Press bearing cups (5) and (7) into wheel hub (6). Check both bearing cups to make sure they are seated squarely.
6. Install wheel hub (6) over axle shaft (2). Press the wheel hub into place so that bearing cone (5) is fitted into bearing cup (10).
7. Press bearing cone (11) on axle shaft (2) so that it is fitted into bearing cup (7).
8. Set washer (12) on top of bearing cone (11).
9. Install slotted nut (14) on axle shaft (2). Tighten the nut to 17 to 20 N·m (13 to 15 lb. ft.). After tightening, slots on nut (14) must be positioned to allow installation of roll pin (15).
10. Install roll pin (15) through slots in nut (14) and end of axle shaft (2).
11. Rotate wheel hub (6) by hand a few times. The wheel hub should rotate smoothly, with no feeling of roughness.
12. Apply a light film of oil to a new gasket (13). Set the gasket in place on face of wheel hub.
13. Install hub cap (8) to wheel hub (6) on top of gasket (13). Secure the hub cap with three bolts and lock washers (9). Tighten the three bolts to 17 N·m (13 lb. ft.).
14. Pump no. 2 grease into the wheel hub assembly through the grease fitting on hub cap (8). Stop when grease comes out between wheel hub (6) and housing (3).
15. Install one wheel and tire assembly to the hub and axle assembly. Weight of the wheel and tire assembly is approximately 36 kg (80 lbs.).
16. Secure the wheel and tire assembly with six lug bolts. Tighten the lug bolts in a cross pattern to 75 N·m (55 lb. ft.).
End By:
a. install hub and axle assemblies
Disassemble Double Wheel Hub and Axle Assembly
Double Wheel Hub and Axle Components
(1) Axle shaft. (2) Housing. (3) Seal. (4) Bearing cup. (5) Wheel hub. (6) Bearing cup. (7) Hub cap. (8) Bolts and lock washers. (9) Set screw. (10) Bearing cone. (11) Bearing cone. (12) Washer. (13) Gasket. (14) Slotted nut. (15) Roll pin.
Start By:
a. remove hub and axle assemblies
1. Remove 12 lug bolts securing two wheel and tire assemblies to the hub and axle assembly.
2. Remove the two wheel and tire assemblies. Weight of each assembly is approximately 36 kg (80 lbs.).
3. Remove three bolts and lockwashers (8) securing hub cap (7) to wheel hub (5), on one end of the assembly.
4. Remove hub cap (7) and gasket (13). Discard gasket (13). This must be replaced with a new part during assembly.
5. Drive roll pin (15) out of slotted nut (14) and axle shaft (1).
6. Remove slotted nut (14) and washer (12) from axle shaft (1).
7. Pull wheel hub (5) straight away from housing (2) and axle shaft (1).
NOTE: Keep bearing cup (4) and cone (10) together. Keep bearing cup (6) and cone (11) together. This will help prevent parts from being mixed during assembly.
8. Remove bearing cone (11) from inside wheel hub (5).
9. Use a suitable puller or driver to remove bearing cups (4) and (6) from inside wheel hub (5).
NOTE: Bearing cone (10) and seal (3) should remain on the axle shaft. These parts will be removed in a later step.
10. Repeat steps 3 through 9 to disassemble components at the other end of the assembly.
11. Remove set screw (9) from housing (2) and axle shaft (1).
12. Push axle shaft (1) into housing (2) to create a little space between the housing and bearing cones (10) and (17).
13. Use a suitable puller to remove bearing cones (10) and (17) from axle shaft (1).
14. Remove seals (3) and (16) and discard. These must be replaced with new parts during assembly.
15. Pull axle shaft (1) out of housing (2).
16. Clean axle shaft (1) and the inside of the wheel hubs thoroughly. Inspect these parts for damage, especially in the bearing seat areas. Make sure axle shaft (1) is not bent. Repair or replace any damaged components.
17. Wash bearing cups (4) and (6) and cones (10) and (11) in solvent. Dry the bearings immediately after cleaning. Do not dry bearings by spinning with compressed air.
18. Inspect bearings carefully for excessive wear or damage. If necessary, replace bearing cups and cones in sets only.
19. Clean all other parts and inspect for damage or excessive wear. Repair or replace parts as necessary.
Assemble Double Wheel Hub and Axle Assembly
Double Wheel Hub and Axle Components
(1) Axle shaft. (2) Housing. (3) Seal. (4) Bearing cup. (5) Wheel hub. (6) Bearing cup. (7) Hub cap. (8) Bolts and lockwashers. (9) Set screw. (10) Bearing cone. (11) Bearing cone. (12) Washer. (13) Gasket. (14) Slotted nut. (15) Roll pin.
1. Install axle shaft (1) into housing (2). Install the axle from the left side of the housing, as seen above. The installation chamfer in the right side of housing (2) will make axle installation easier.
2. Adjust the position of axle shaft (1) so that set screw (9) can be installed.
3. Secure axle shaft (1) to housing (2) with set screw (9).
4. Apply a light film of oil to a new seal (3). Install the seal on one end of axle shaft (1). Make sure the flat side of the seal is against housing (2), as shown.
5. Press bearing cone (10) on axle shaft (1), against seal (13) and housing (2). Make sure the bearing cone is seated squarely against housing.
6. Press bearing cups (4) and (6) into wheel hub (5). Check both bearing cups to make sure they are seated squarely.
7. Install wheel hub (5) over axle shaft (1). Press the wheel hub in place so that bearing cone (10) is fitted into bearing cup (4).
8. Press bearing cone (11) on axle shaft (1) so that it is fitted into bearing cup (6).
9. Set washer (12) on top of bearing cone (11).
10. Install slotted nut (14) on axle shaft (1). Tighten the nut to 17 to 20 N·m (13 to 15 lb. ft.). After tightening, slots on nuts (14) must be positioned to allow installation of roll pin (15).
11. Install roll pin (15) through slots in nut (14) and end of axle shaft (1).
12. Rotate wheel hub (5) by hand a few times. The wheel hub should rotate smoothly, with no feeling of roughness.
13. Apply a light film of oil to a new gasket (13). Set the gasket in place on face of wheel hub.
14. Install hub cap (7) to wheel hub (5) on top of gasket (13). Secure the hub cap with three bolts and lockwashers (8). Tighten the three bolts to 17 N·m (13 lb. ft.).
15. Pump no. 2 grease into the wheel hub assembly through the grease fitting on hub cap (7). Stop when grease comes out between wheel hub (5) and housing (2).
16. Repeat steps 3 through 14 to install components to the other end of the assembly.
17. Install two wheel and tire assemblies to the hub and axle assembly. Weight of each wheel and tire assembly is approximately 36 kg (80 lbs.).
18. Secure the wheel and tire assemblies with six lug bolts each. Tighten the lug bolts in a cross pattern to 75 N·m (55 lb. ft.).
End By:
a. install hub and axle assemblies