Spicer TIMS (Tire Inflation and Monitor System) for Trailers Installation Guide - Manual (Page 13)

10
Installation
Installation
Note: Follow the axle manufacturer’s recommendations for
the location and process to modify axle. Failure to follow
the recommendations may reduce the life or load carry-
ing capacity of the trailer.
Note: On Hendrickson axle/suspensions, only drill in window
area (consult manufacturer for details).
10. On the top of the axle under the trailer, locate the
center and mark. From the center mark just created,
measure to the left and right an equal distance of
13-1/2" or greater (within suspension brackets) and
mark.
11. Drill and tap 1/4" NPT holes in axle beam to prepare
for component installation.
• Mount drilling fixture on trailer axle in proper
location (13.5" from center and at 12:00).
• Install the 1/2" x 1/2" long drill bushing in the
fixture.
• Install the 3/16 x 3/4" long drill bushing in the
first bushing.
• Drill though the axle tube with a 3/16" boron
steel drill bit. Do not exceed 300 RPM.
Note: Cutting oil is recommended.
Note: A lever may be necessary to produce enough force to
cut the material. Reduce force on lever before the bit
goes through to prevent breaking the bit.
• Remove the 3/16" and 1/2" drill bushings from
the fixture.
• Install the 7/16 x 1/2" long drill bushing in the
fixture.
• Drill through the axle tube with a 7/16" boron
steel drill bit. Do not exceed 300 RPM.
• Remove fixture and ream hole with a tapered
reamer for a 1/4" tapered pipe.
• Reinstall fixture and install tapping bushing.
• Tap hole with a 1/4" male pipe tap.
• Clean debris from the axle generated during the
drilling and tapping operations. Check the size
of the threads created.
12. Proceed to the Component Installation section.
Component Installation
Refer to the following assembly procedures to complete the
installation of the Spicer Tire Maintenance System.
Component installation procedures include:
• Axle Hose Installation
• Spindle Plug Installation
• Rotary Joint Assembly and Installation of Rotary
Joint
• Hubcap Assembly
• Controller Assembly
• Wiring Harness Installation
• Axle Vent and Control Line Installation
• Tire Hose Installation