300Tdi Discovery
ZF
17
REPAIR
PARKING PAWL MECHANISM
Service repair no - 44.28.07
Remove
1. Remove transfer box.
See TRANSFER
GEARBOX, Repair, LT230T Transfer Gearbox
2. Remove transfer gear selector housing.
3. Loosen nine bolts holding extension housing.
4. Remove extension housing ensuring that seal is
not damaged, discard gasket.
5. Remove extension shaft and retaining bolt with
’O’ ring. If Tdi vehicle, remove spacer.
6. Remove governor assembly with parking wheel.
7. Remove guide plate bolt.
8. Remove plate and guide plate from gearbox
case.
9. Remove pin, pawl and spring.
CAUTION: When removing assembly.
Avoid damaging parts which could weaken
spring tension.
10. Inspect all parts for wear or damage. Replace if
necessary.
Refit
11. Fit pin and leg spring, locate spring correctly.
12. Fit pawl to pin. Locate spring leg into hole in
pawl to create tension in spring.
13. Fit plate and guide plate. Tighten to
10 Nm.
14. Push governor assembly with parking wheel
onto output shaft until seated.
NOTE: Apply petroleum jelly to ’O’ ring.
Ensure seal rings are snapped together
and seated.
15. Fit new gasket to rear of gearbox. Fit extension
housing, taking care not to damage seal or
assembly.
16. Fit extension shaft with spacer if Tdi and
retaining bolt with new ’O’ ring.
17. Fit extension housing, tighten nine bolts to
23Nm.
18. Fit transfer gear selector housing, tighten three
bolts to
25 Nm.
19. Refit transfer box.
