Spicer TIMS (Tire Inflation and Monitor System) for Trailers Installation Guide - Manual (Page 12)

9
Installation
Axle Preparation
The following describes the procedure for preparing a trailer
axle for system installation.
The Spicer Tire Maintenance System is designed to be
used on trailer axles with hollow tapered (D22 series) or hol-
low parallel (P22 series) spindles with inside diameter
machined to a minimum depth of 1.0". Some trailer axles have
a solid web inside the spindle under the inner bearing that
may be modified to allow for a hose to be routed through the
obstruction. Consult with the axle manufacturer for approval
to modify the axle before installation of the Dana Spicer Tire
Maintenance System.
CAUTION: Do not weld on axles with hoses installed as
hoses may be damaged.
Note: The Maintenance System cannot be installed on solid
spindle trailer axles.
Note: The Maintenance System is not compatible with Axilok
or cotter pin locked spindle nuts. Use of the 3-piece jam
nut system with the maintenance system is recom-
mended. Pro-Torque nuts may require use of an optional
hubcap spacer.
The
Spicer Tire Maintenance System does not require
the removal of the wheel assemblies. However, the tires must
be blocked and the trailer supported to prevent movement
during installation.
WARNING: Block all wheels before beginning this
installation procedure. Never work under a vehicle sup-
ported by a jack.
1. Block tires to keep the trailer from moving.
2. If the trailer is equipped with an air suspension sys-
tem, deflate the air springs or support the trailer
frame to prevent settling during installation.
3. If the wheel end is oil lubricated, drain the oil from
the hubcap and discard.
4. Remove the hubcap bolts and hubcap.
5. Remove the spindle plug from the end of the spindle.
6. Inspect spindle plug bore and remove any burrs or
sealant.
7. Check the inside of the spindle to insure that there is
a passage through the axle to allow installation of the
air line.
8. Locate the three 1/4" pipe plugs on the top of the
axle tube near the center and remove. If the axle was
not prepared at the factory with the three 1/4" pipe
thread holes, proceed to step 10.
9. Proceed to the Component Installation section.
OR
D22-Style
Tapered Spindle
P22-Style
Parallel Spindle
218UX007
218UX008