Front Axle Tube Seal - Oil Leaks
12/06/9654/01/96/US
SUBJECT:
PRIDE - Front Axle Tube Seal Replacement
MODEL:
Range Rover 4.0/4.6
AFFECTED VEHICLES:
LP 1995-1996 (VIN up to VA348603)
(Axle up to 90L52360A)
LH
LJ
LD
DETAIL
Some 1995 and 1996 Range Rovers can leak axle oil through the front axle seals. New seals have been developed which offer improved sealing. Upon inspection, if either of the front axle seals is leaking, replace both left and right seals with the new seals. From the above VIN the improved seals have been fitted at the factory.
The diagnostic steps and repair procedures detailed in this bulletin were developed as an element of the Land Rover Way OPERATION PRIDE. This TIB provides a library location for PRIDE information within the Land Rover North America technical literature system.
ACTION REQUIRED
Upon customer complaint for the symptoms outlined, perform the specified repairs.
PARTS INFORMATION
1. FTC4822 - Axle Seals (Qty. 2)
2. FTC1374 - ABS Bushing (Qty. 2)
3. FC112127P - Hub Bolts, (Qty. 8)
4. FTC2996 - Caliper Mounting Bolts (Qty. 4)
Locally sourced items:
API GL-4 or GL-5 axle fluid
Silicone grease:
^ Staborags NBU-Wabco 830 502, 0634
^ Wacker chemie 704-Wabco 830 502, 0164
Kluber GL301
PROCEDURE
Perform the diagnostic procedures and repairs outlined in this bulletin for the repair of front axle tube seals.
Removal
1. Remove front road wheels.
2. Remove bolt from lower guide pin of each caliper (Figure 1).
CAUTION:
Guide pin uses a special flange headed bolt. DO NOT use any other type of bolt.
3. Swivel caliper upwards and remove the brake pads.
4. Loosely refit guide pin bolt.
5. Remove two bolts securing caliper to carrier and discard bolts.
6. Tie caliper aside, ensuring brake hose is not stressed.
7. Remove screw securing disc. Remove disc.
8. Using wire brush, remove corrosion from mating surfaces. Clean with suitable solvent.
9. Remove three bolts (Figure 2). Remove disc shield.
10. Release ABS sensor harness from brackets on axle and hub (Figure 3).
11. Release sensor from hub.
12. Remove sensor bush.
13. Release four bolts securing hub to carrier and discard bolts (Figure 4).
14. Release hub from carrier. Remove hub and drive shaft assembly.
15. Using suitable tool, remove drive shaft seal from axle casing.
Inspection
1. Inspect seal track on axle for surface damage. Replace with new component if damaged.
2. Inspect seal locating bore and remove any sharp edges that may damage the new seal.
3. Inspect axle breather for proper operation and verify it is not restricted or blocked.
Swivel Hub Alignment Check
Note:
Swivel hub alignment is crucial to seal life.
Alignment must be checked and adjusted if necessary.
1. Clean axle seal bore.
2. Clean inside diameter of swivel hub to remove rust and dirt buildup.
3. Using tool # LRT-54-006/1.
^ Turn clamp screw fully counterclockwise.
^ Ensure that clamp toggle rotates smoothly.
4. Locate tool into axle casing with "Top" mark upwards (Figure 5).
5. Make sure that tool is located properly in seal bore and tighten clamp screw. Using soft-faced mallet, tap end of clamp screw to properly seat in bore. Tighten screw if necessary.
6. Check adjustment of swivel hub by sliding tool # LRT-54-006/2 over tool # LRT-54-006/1.
CAUTION:
Do not force tool into hub.
7. Adjustment is correct if tool # LRT-54-006/2 is a sliding fit in swivel hub.
8. If tool is not a sliding fit, adjust with the following procedure.
Swivel Hub Adjustment
1. Remove 2 nuts securing track rod and drag link to swivel hub (Figure 6).
2. Break taper joints. Move track rod and drag link aside.
3. Remove 2 nuts securing joints to swivel hub.
4. Break taper joints on top and bottom and remove swivel hub.
5. Remove taper collet from swivel hub (Figure 7).
6. Clean taper register in swivel hub and collet.
7. Fit taper collet into swivel, until a 4 mm (0.16 in) gap exists between the shoulder of collet and swivel.
8. Fit swivel hub to axle. Fit upper joint nut (Figure 6). Holding joint with Allen key, tighten nut to 110 Nm. (81 lbf. ft.).
9. Fit and tighten lower swivel joint nut until the taper is seated in the collet, but the collet can still turn. Adjust the height of the hub using taper collet until tool # LRT-54-006/2 is a sliding fit in hub.
10. Remove tool # LRT-54-006/2. Tighten collet 1.25 turns to allow for further seating into taper when tightening lower swivel joint nut.
11. Tighten lower swivel joint nut to 160 Nm. (118 lbf. ft.).
12. Check adjustment of swivel hub using tool # LRT-54-006/2. If swivel hub is too high, remove tool # LRT-54-006/2, tighten the lower swivel joint nut a further 20 Nm. (15 lbf. ft.), check adjustment. If adjustment is still required, tighten lower swivel joint nut to a maximum torque of 200 Nm. (148 lbf. ft.).
13. If swivel hub is too low or adjustment is still necessary, loosen lower swivel joint nut and break taper. Seat taper into collet. Turn collet as required. If swivel hub is high, tighten collet. If it is low, loosen collet. Torque lower swivel nut. Recheck adjustment using tool # LRT-54-006/2.
14. Loosen clamp screw and remove tool # LRT-54-006/1 from axle casing.
15. Clean drag link and track rod end mating faces. Connect to swivel hub.
16. Tighten track rod and drag link nuts to 80 Nm. (60 lbf. ft.).
Installation
1. Clean ABS sensor and location, drive shaft and its seal location, and hub bearing carrier and its location in the hub.
2. Lubricate oil seal lip and its running surface on driveshaft.
3. Fit axle seal to axle case, using tool # LRT-54-012.
4. Fit hub and driveshaft assembly. Fit new hub bolts and tighten to 135 Nm. (100 lbf. ft.).
5. Lightly grease ABS sensor and bush, using silicone grease (Staborags NBU-Wabco 830 502, 0634 or Wacker chemie 704-Wabco 830 502, 0164 Kluber GL301).
6. Fit ABS sensor bush.
7. Fit ABS sensor fully into bush, secure lead to brackets.
8. Install disc shield with bolts. Tighten to 8 Nm. (6 lbf. ft.).
9. Fit brake disc, secure with screw. Tighten to 25 Nm. (18 lbf. ft.).
10. Untie brake caliper.
11. Fit brake caliper, secure with new mounting bolts. Tighten to 165 Nm. (122 lbf. ft.).
12. Remove previously loosened guide pin and swivel caliper upwards.
13. Fit brake pads with chamfer towards leading edge of disc (towards rear of vehicle). Swivel caliper downwards into position.
14. Fit guide pin bolt. Tighten to 35 Nm. (26 lbf. ft.).
15. Apply brake pedal several times to locate pads.
16. Check axle fluid level and top up as necessary.
17. Fit road wheels. Tighten to 108 Nm. (80 lbf. ft.).
18. Road test vehicle and check for leaks.
WARRANTY:
Normal warranty procedures and policies apply.
COMP.CODE:
SRO:
54.15.04 - Time: 1.65 hr. each side
Check/Align and Replace