Subsection 13 (GEARBOX AND 4X4 COUPLING UNIT (WITH GBPS))
vmr2006-022-032_a
1. Coupling fork
2. Micrometer
COUPLING FORK CLAW THICKNESS
NEW
4.95 mm to 5.05 mm
(.195 in to .199 in)
SERVICE LIMIT
4.80 mm (.189 in)
Assembling the Gearbox
The assembly of gearbox is essentially the reverse
of disassembly procedure. However, pay atten-
tion to the following details.
Gearbox Bearings
Unless otherwise instructed, never use hammer
to install ball bearings. Use press machine only.
If necessary heat housings up to 100°C (212°F)
before installing ball bearings.
WARNING
Clean oil, outside and inside, from housing
before heating.
Place new bearing in freezer for 10 minutes be-
fore installation.
Use a suitable installer for installing ball bearings
of countershaft and main shaft.
NOTE:
Place gearbox housings on a wood stand
before installing ball bearings.
Install new oil seals with the proper installer (refer
to
OIL SEALS
in this subsection).
Main Shaft and Shift Forks
Install
NEW
snap rings.
NOTE:
Ensure snap rings are installed in the
grooves properly.
Install free pinion (REVERSE range gear) and shift-
ing sleeve (LOW/REVERSE range gear) properly.
vmr2012-020-011_a
1. Main shaft
2. Free pinion (REVERSE range gear)
3. Snap ring
4. Shifting sleeve (LOW/REVERSE range gear)
5. Shifting dogs (REVERSE range gear)
Collars of free pinion (LOW range gear) and free
pinion (HIGH range gear) must point together.
Tmr2013-020-002_a
1. Free pinion (LOW range gear), 44 T
2. Collar
3. Free pinion (HIGH range gear), 36 T
4. Collar
Place shifting sleeve (HIGH range gear) with shift
fork in the center of on main shaft bearing in cen-
ter housing.
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