169
Troubleshooting
PROBLEM
CAUSE AND SOLUTION
UHP Pump & High Pressure System
Low outlet pressure.
• Low or no inlet water pressure. Check to see that
water charge pump is on and valve to charge
pump is open.
• PTO slipping. Allow PTO to cool and make
adjustments to tighten PTO.
• Leaking packing. Determine which is leaking
and change, ush and replace.
• Leaking or cracked valves. Check face of
manifold for heat to nd leaking valve and
replace or rebuild.
• Shut-off (Dump Valve) cartridge leaking.
Remove return hose and check cartridge,
if leaking remove diuser tube and replace
cartridge.
• By-pass valve cartridge leaking. Remove diuser
tube and replace cartridge.
• Leaking swivel seal. Remove spent seal, check
shaft nipple, clean thoroughly and replace with
new seal.
• Cracked swivel shaft. Remove shaft assembly
and disassemble to inspect shaft and replace if
damaged or cracked on nipple end.
Vacuum System
Vacuum loss or failure.
• Engine and/or blower not running. Make sure
engine is running and vacuum system is activated.
• Vacuum blower RPM not high enough. Adjust
RPM higher.
• Vacuum lter dirty and clogged. Rinse with hose
or replace if too badly clogged.
• Worn or improperly adjusted shroud wear brush.
Adjust or replace brush.
• Broken vacuum hose or tting. Inspect hoses &
ttings and replace any parts damaged.
• Vacuum line plugged with debris. Remove clogged
hose, ush to remove blockage or replace with
new hose if necessary.
• Slipping vacuum belt. Tighten belt or replace if
worn or damaged.
• Debris tank door leaking. Make sure door is
completely closed and latched. Check for proper
seal ination pressure. Open door and clean seal
and contact area if necessary.
• Debris tank dump valves open. Clear valves of
any debris and close. If a valve still leaks, it may
be necessary to replace the valve.
• Relief valve stuck open. Lubricate plate & stem
make sure it is free.
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