PressureGuard Installation Manual - Fleet Air

Step 4 – Axle Preparation
Axle Preparation
4-1 Starting with the rear axle, drill three 11/32” dia. holes in the top (12 o’clock)
position of the axle. The horizontal location of the holes is not critical, and
depends on convenience and ease of drilling. However, the closer the holes are
to the spindle ends, the easier it is to feed the air line through the axle. Do not
drill on the center mark of the axle. This mark is needed for axle
alignment. See Tool and Equipment section for Axle Drill Fixture.
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