Specifications

63
Assembly and Installation
MAINTENANCE MANUAL
5.Tightenthejamnut,ifequipped,tothecor-
rect torque value against the differential case.
See the Section 8. Figure 5.62.
To complete the assembly of axles equipped
with driver-controlled main differential locks,
see the Section 6.
Air Shift Unit for the Inter-Axle Differen-
tial Lock (IAD)
Air Applied and Spring Release Models,
Standard
1. Inspect the shift shaft for damage. Use an em-
ery cloth to remove any small damage. If nec-
essary, replace the shift shaft. Figure 5.63.
2 Place the spring and the shift fork into posi-
tion in the differential. The spring must touch
the screw side of the differential. The boss on
theforkmustbetowardtheadjustingbolt.
3. Install the shift shaft so the smaller part of the
shaft goes through the fork and the spring.
4. If removed, install the O-ring onto the piston.
Apply axle lubricant to the O-ring.
5. Install the piston in the shift shaft.
WARNING
When you apply some silicone gasket materi-
als, a small amount of acid vapor is present.
To prevent serious personal injury, ensure
that the work area is well-ventilated. Read the
manufacturer’s instructions before using a sili-
cone gasket material, then carefully follow the
instructions. If a silicone gasket material gets
into your eyes, follow the manufacturer’s emer-
gency procedures. Have your eyes checked by
a physician as soon as possible.
6.Onange-typecylinders,applysiliconegas-
ket material onto the mounting surface of the
cylinder.
On threaded cylinders, apply a continuous
0.06-inch(1.5mm)diameterbeadofaange
sealant, Meritor part number 2297-D-7076,
around the cylinder thread circumference.
7.Installthecylinder.Onange-typecylinders,
install and tighten the capscrews 7-12 lb-ft
(10-16 N.m).
NOTE:
Theadjustingscrewissettothespecied
distance after the input shaft assembly is
installed. El tornillo de ajuste debe ser mon-
tadoconladistanciaespecicadadespués
del eje del mecanismo de bloqueo estar in-
stalado.
8.Installtheadjustingboltandthejamnut.
Spring Applied and Air Release Models (Re-
verse Shift Systems)
1. Lubricate all the parts with axle lubricant.
Figure 5.64.
Figure 5.62
Figure 5.63
REAR DIFFERENTIAL EXAMPLE
HOLD THRUST
SCREW IN POSITION.
TIGHTEN JAM NUT TO
CORRECT TORQUE
VALVE.
FORK
JAM NUT
COLLAR
ADJUSTIG BOLT
BOLT-ON IAD
COVER
CAPSCREW
SHIFT SHAFT
SPRING
O-RING
SCREW-IN IAD
COVER
PISTON
O-RING
O-RING
O-RING
SPRING
SHIFT
CYLINDER
“E” CLIP SLOT
SHIFT
SHAFT
“E” CLIP
REMOVED
SMALL
SNAP RING
COVER
PISTON
BOLT-ON IAD REVERSE SHFTER