105
Section 5 - Scheduled Maintenance
5.6 High Pressure Hose Installation
High pressure hoses should be inspected weekly
or every 50 hours and replaced as required. Use
the following procedure when replacing a pres-
sure hose.
When replacing damaged or worn high pressure
hoses, check the burst rating marked on the
hose. Always use a replacement hose with an
equal or greater pressure rating.
Replacing a high pressure hose:
1. Make sure the water blasting system is shut-
down with the truck in the service position.
2. To avoid contamination that could clog nozzles,
always make sure hose fittings and the area
around the hose connections are thoroughly
cleaned.
3. Remove the old high pressure hose and cap
the fittings to prevent contamination.
4. If the hose to be replaced is routed through
a tight area, use the 7/8” hose coupler fit
-
ting in the Spare Parts System and attach an
end of the new hose to the fitting on the old
hose. Cap the other fitting on the new hose
to prevent contamination, then carefully pull
the old hose out while guiding the new hose
into place.
5. If the new hose will be routed on its own and
not pulled through by the old hose, cap both
ends to prevent contamination and carefully
route the hose into position.
6. Verify the routing of the hose, making sure it
is not in contact with sharp edges or near a
source of heat that could damage the hose.
Install anti-chaffing or heat deflectors to pro
-
tect the hose if necessary.
7. Remove the caps and apply a light coat of anti-
seize to the threads of each fitting. Then attach
the fittings and tighten to specifications.
8. Remove the spray bar protector.
9. Press and hold the lock button at the base of
the spray bar motor to hold the thru-shaft so
it won’t turn.
10. Turn the spray bar counterclockwise by hand
until it is free of the shaft.
11. Remove brass button seal.
12. Use a stainless steel wire brush to clean the
dirt from the thru-shaft threads.
13. Reactivate the truck and the water blasting
system by following the steps in the Start Up
Procedure.
14. Activate the charge water system and purge
the blast head at low pressure to remove de-
bris that could have entered the system while
changing the hose.
15. Shutdown the water blasting system and re-
turn the truck to service position.
16. Apply a light coat of anti-sieze to the thru-
shaft threads.
17. Install a new brass button seal.
18. Press and hold the lock button at the base of
the motor to hold the thru-shaft so it won’t turn.
19. Tighten the spray bar by turning it clockwise
slowly until it stops. Then seat the seal by
turning the spray bar another 15%. Make sure
the lock button releases the thru-shaft when
installation is complete.
20. Install the spray bar protector and gasket.
21. Reactivate the truck and the water blasting
system by following the steps in the Start Up
Procedure. Operate the Ultra-High Pressure
system to check the new high pressure hose
for leaks.
Typical High Pressure Water Hose
Summary of Contents for SK5500
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Page 143: ...143 Appendix 3 Daily Report Pre Op Checklist 1 877 HOG ROAD WWW STRIPEHOGSUPPORT COM...
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