Spicer TPCS (Tire Pressure Control System) Service Manual - Manual (Page 28)

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Figure 15 Overview of Trailer Air Line Routing
The following procedure discusses replacing the
pneumatics for a trailer axle. You may not require all
the steps depending on what parts you are replacing.
Trailer Axle Pneumatic Replacement
Note: Refer to Figures 15 and 16 for the following
steps.
Pneumatic Service
Trailer Wheel End
Plumbing
KEY
Plastic Tubing
Wire Braid Hose
PCU
From 5' to 30' of "
Nylon Tubing
Trailer
Quick Disconnect
To Trailer Axles
" Wire Braid Hose
or " Plastic
Pneumatic Control Unit
to Trailer Hose Connections
1 /
2
5 /
16
1 /
2
See Chart in Figure 9