Borg Warner Transfer Box Overhaul Epicyclic Gear Set
TRANSFER BOX
4
OVERHAUL
VISCOUS COUPLING UNIT (VCU)
Service repair no - 41.20.66/01
Remove
1. Remove front output shaft drive flange.
See
this section.
2. Remove 6 bolts securing VCU housing to
transfer box.
3. With care, break front face RTV seal and
remove VCU assembly.
Do not carry out further dismantling if
component is removed for access only.
4. Press out viscous coupling from housing.
CAUTION: Protect output shaft thread and
do not use excessive force when pressing
out viscous coupling.
Refit
1. Clean mating surfaces of viscous coupling
housing and transfer box.
CAUTION: Do not use a metal scraper as
this may damage sealing surfaces.
2. Clean bearing and VCU mating faces.
3. Press VCU into bearing.
4. Apply a continuous 2mm bead of sealant to
VCU housing mating face. Path to be around
inside of bolt holes.
5. Fit VCU assembly to transfer box ensuring
correct alignment of bolt holes before
disturbing RTV bead.
6. Fit bolts and progressively tighten to 35 Nm.
(26 lbf.ft)
7. Fit front output shaft drive flange.
See this
section.
EPICYCLIC GEAR SET
Service repair no - 41.20.68/01
Remove
1. Remove viscous coupling assembly.
See this
section.
2. Remove 17 bolts securing halves of transfer
box casing.
3. Carefully break RTV seal and remove front
transfer gearbox casing from rear casing.
4. Position front casing, input shaft upwards.
Position block of wood under epicyclic gear
set.