Hog Technologies STRIPE SH7500, Operation Manual

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Section 5 - Scheduled Maintenance
5.5 High Pressure Hose Installation
The high pressure hoses should be inspected
weekly or every 50 hours and replaced as re-
quired. Use the following procedure when replac-
ing a pressure 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. Hold the thru-shaft so it won’t turn with a
3/4” (19 mm) wrench inserted in the slot at
the base of the thru-shaft motor.
10. Turn the spray bar counterclockwise by hand
until it is free of the shaft.
11. Remove brass button.
12. Use a stainless steel wire brush to clean the
dirt from the thru-shaft threads.
13. Reactivate the truck and the waterblasting
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, hold the thru-
shaft with the wrench and reinstall the spray
bar.
18. 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
you remove the wrench when the installation
is complete.
19. Install the spray bar protector and gasket.
20. Reactivate the truck and the waterblasting
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