Power Take Off Cover Plate - Oil Leaks
17/06/9441/03/94/US
SUBJECT
LT230T Transfer Gearbox Power Take Off (PTO)
Cover Plate Leak
AFFECTED VEHICLES
Discovery from LJ 081991 to LJ 083175
Defender from LD 939976 to LD 940700
MODEL
Discovery
Defender
DETAIL
A number of reports have been received which detail oil leaks from the power take off (PTO) cover plate on the rear of the transfer gearbox. At the VIN identified above a new manufacturing process was implemented that eliminated the use of conventional gaskets and introduced liquid Hylogrip 2000. Investigation by Land Rover engineers found that the cause of these oil leaks can be attributed to two conditions:
1) Insufficient sealant applied to the joint faces of mating pans.
2) Joint face on PTO cover not flat
ACTION REQUIRED
Upon customer complaint of an oil leak from this area or if identified during normal servicing follow the procedure below.
PARTS INFORMATION
Locktite 518 - source locally
FTC 3178 PTO cover plate
PROCEDURE
Refer to section 41 of the workshop manual for PTO cover plate removal instructions.
1) Remove the PTO cover plate and dean any residual sealant from both joint faces of the plate and gearbox casing.
2) Check PTO cover plate joint face for flatness using a straight edge. replace the cover plate if excessive distortion is noted. greater than .010 inch (0.25 mm).
Note: Any small raised areas on the joint face can be carefully removed using a fine file.
3) Apply sealant to the joint face of the transfer gearbox casing and refit the cover plate.
4) Refit the bolts and tighten to 29 to 37 lbf ft,. 39 to 50 Nm 4 to 5 Kgf/m
WARRANTY
Normal warranty policy and procedures apply
COMP. CODE
3U4N
SRO
41.10.30 - 00.40 hour