HydraMaster RX20 NEXTGEN 120 VAC, Owner'S Manual, Page: 55 / 57

10-1: Owner’s Manual
10 - Troubleshooting
1.0 LOW VACUUM FLOW AT THE CLEANING HEADS
Possible Cause Solution
1.1 Hub not sealing properly. Replace felt seal with a lubricated one.
1.2
Restricted air flow. Remove cleaning head and clear all vacuum lines
and heads of debris.
1.3 Low vacuum flow from
power
Refer to the Troubleshooting section of the source
equipment manual.
2.0 LOW WATER FLOW AT CLEANING HEADS (INDICATED BY IRREGULAR WATER
TEMPERATURE)
Possible Cause Solution
2.1 Restricted jets. Remove jets and clear them of debris.
2.2. Kinked or clogged
solution hose
Remove hose. Repair or replace.
2.3 Cleaning hub not properly
threaded
Remove cleaning hub from shaft. to shaft. Clean and
rethread onto shaft.
3.0 WATER LEAK AT ROTARY UNION
Possible Cause Solution
3.1 Foreign matter in rotary
union seal.
Dismantle rotary union. Clean. Re-assemble and
install.
4.0 WATER LEAK AT VALVE
Possible Cause Solution
4.1 Ruptured plunger or
valve O-ring.
Repair or replace damaged plunger, O-ring, seal.
Check for freeze damage.