
74
Appendix 2 - Troubleshooting
PROBLEM
CAUSE AND SOLUTION
High Pressure Blasting System
Water dripping from hose fitting indicator
port.
• Fitting Loose. Tighten fitting or replace hose and
fitting.
• Fitting is damaged. Replace hose and fitting.
Water dripping from spray Bar and spray
bar weep holes
• Water leaking at spray bar threads - tighten
spray head or replace button seal.
• Water dripping from weep holes in spray bar -
nozzle is not seated properly. Tighten or replace
nozzle. If leak doesn’t stop, replace spray bar
and nozzles.
Water dripping from weep hole on thru-shaft
pump high pressure hose connection.
•
Swivel nut is loose. Hand tighten swivel nut.
•
Swivel seal is worn or damaged. Remove and
replace worn or damaged seal.
•
Cracked swivel or thru-shaft. Remove and
inspect shaft assembly. Replace damaged or
cracked components.
Low blasting pressure at nozzles.
•
Power system engine speed is too low. Raise
engine speed.
•
Pressure control valve is not working properly.
Repair Valve
•
Worn or blown nozzles. Change nozzles.
•
Nozzles are leaking. Tighten or replace nozzles.
•
Oversized nozzles. Refer to chart to correct
nozzle pattern.
• Water leaks in UHP hoses, fittings. Tighten loose
fittings or replace defective hoses and damaged
fittings.
•
Worn or missing button seal between spray bar
and shaft. Replace button seal.
•
Swivel seal is worn or damaged. Replace damaged
swivel seal.
•
Swivel shaft is cracked. Replace damaged swivel
shaft.
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