110
General Maintenance
4.10 Swivel Seal Replacement
The swivel seal must be inspected at the start of
each shift and replaced at the rst sign of leakage
to avoid damage to the swivel nut and thru-shaft
cover housing. Swivel seal leakage is indicated by
water dripping from the weep holes in the housing
just below the swivel nut.
Use the following procedure to replace
the seal:
1. Make sure the waterblasting system is shut-
down and the truck is in the service position.
2. Loosen the swivel nut on the top of the thru-
shaft motor. Be sure to pull the hose and
adapter straight up so you don’t bend the
swivel tit inside the tting.
3. Rotate the end of the high pressure hose
toward you until the swivel seal adapter is
visible.
4. Insert two 6-32 screws into the brass back-up
ring. Tighten the screws evenly to push the
brass back-up ring out of the high pressure
hose adapter.
Swivel Tit In Thru-shaft Cover Housing
A. Brass Back-Up Ring
B. Swivel Seal
C. Swivel Nut Assembly
Thru-shaft Cover Housing & Swivel Nut
A
B
C
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