Spicer TPCS Troubleshooting Guide: Older Systems (ECU's w_Dual Connectors) - Manual (Page 16)

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General Service Guidelines
Service Guidelines
The Tire Pressure Control System requires normal mainte nance much the
same as other systems on the vehicle. Following are some general rules
that apply to Tire Pres sure Control System service:
Clean and Dry Air Supply
The Spicer Tire Pressure Control System requires a con stant supply of
clean dry air. An adequately sized and properly maintained air dryer
is critical for continued proper operation of the Tire Pressure Control
System. Even though the air dryer may be working properly, moisture can
accumulate in the wet tank during normal operation due to the increase
in air consumption. It is important to drain the wet tank daily. Draining
the wet tank completely when the truck is not in use will also help keep
moisture under control.
Line Replacement and Routing
When replacing air lines, do not allow kinks, sharp bends or stretching in
order to tighten joints. If any tube or hose segment does not appear to fit
easily, it could mean you are not using the proper part or that you are not
following service procedures properly. Ensure that replacement lines are
the correct length.
Each segment of the pneumatic system must be secured to the vehicle
frame or other installed line. After complet ing assembly of each segment,
use cable ties to anchor the segment at approximately 18” intervals.
Caution: Proper Tire Pressure Control System operation requires
correct air line diameters and lengths for each channel. Refer to
the Tire Pressure Control System service manual for length and
diameter information.
Joint Compound
Here are some important “DO’s” and “DON’Ts” regard ing the use of
thread sealant:
• Do apply a thin coating of compound on male threads of pipe joints,
tubing connections, and other system fittings.
• Don’t use any compound on 0­ring, compres sion, or flare fitting
connections. Instead, apply a thin coat of silicone grease to 0­rings
and flares.
• Don’t use Teflon thread tape anywhere in the air system. (Teflon tape
shreds can become lodged in valving.)