Spicer TPCS (Tire Pressure Control System) Service Manual - Manual (Page 44)

44
Drive Axle Wheel End
Service
Install Drive Axle Inlet Tube
1. Install pipe end of 3 /
8
" male NPT to 3 /
8
" flareless tube
end, 45° elbow.
2. Position tube end toward opening of brake flange.
Feed drive axle inlet tube through brake flange hole
and insert into the tube end of the fitting. The tube
must bottom out in fitting
3. Manually screw nut onto fitting body until finger
tight.
4. Make reference mark on nut and tube and tighten nut
an additional 1 3 /
4
turns.
5. Loosen nut and inspect for proper preset.
Note: A ridge of metal has been raised above the tube
surface, to a height of at least 50% of the thickness of the
ferrule’s leading edge, completely around the tube. Avoid
rotating the ferrule.
Retightening Sequence
If the fitting body was used for ferrule pre-set, retighten
the nut to the same fitting body used earlier in the pre-set.
Air Seal Installation
1. Pre-lube the two hub inner O-rings and install in
wheel hub. (See Figure 33.)
2. Install three alignment pins in hub. Alignment pins
can be made of three 8 /
32
x 1 1 /
2
" screws with heads
removed.
3. Position the air seal assembly (with protective
guard) in hub and press into place until the flange
is seated against the hub.
• Remove pins.
• Apply removable thread locking compound to
the mounting bolt threads.
• Install the three 8 /
32
mounting bolts.
4. Pre-lube the inner bearing with the same lubricant
used in the axle sump. Place the inner bearing in
the wheel hub.
Figure 33 Wheel Hub Preparation for Installation
1. Install
O-ring Seals
3. Position Air
Seal Assembly with
Protective Guard
OIL
AIR
Hub Inner
O-ring Seals Air
Seal
Oil
Bearing New
Inner
Bearing
Outer
Bearing
2. Install Threaded
Alignment Pins
4. Remove
Threaded Pins
5. Apply Thread Locking
Compound and
Install Air Seal
Mounting Screws
6. Install Inner Bearing
and Unitized Hub Oil Seal
Protective
Guard
Air
Seal