HydraMaster GTXR+ - High Pressure System

Systems Troubleshooting: 8-8
HIGH PRESSURE SYSTEM
1.0 The pump will not come up to normal cleaning pressure
Possible Cause Solution
1.1 The pressure adjusting
valve is faulty.
Inspect the valve. Repair or replace if necessary.
1.2 Worn seals or valves in
the pump.
Test the pump output volume directly from the pump
at normal running rpm. If the volume is below the
manufacturer’s specications, replace the seals and
inspect for defective valves.
1.3 The pump rpm is too low. Check for a loose pump belt. Adjust or replace as
necessary.
Check the engine rpm and adjust as necessary to
3,200 rpm under no vacuum load.
1.4 The primary orice is
missing or loose.
Remove and inspect. Tighten or replace as
necessary.
1.5 The primary and
secondary orices have
been installed incorrectly.
Inspect and reverse if necessary. Refer to the
Machine Assemblies & Parts List Section.
1.6 The primary orice is
worn.
Measure the orice size and replace as necessary.
Correct size is 0.021”.
2.0 No pressure reading on gauge
Possible Cause Solution
2.1 The pump belt is broken. Inspect and replace if necessary.
2.2 The gauge is faulty. Replace the gauge.
3.0 The psi gauge reads normal; low pressure from wand
Possible Cause Solution
3.1 Restriction in the cleaning
tool.
Inspect the tool jet(s) and clean or replace as
necessary.
Inspect any lters in the cleaning tool and clean or
replace as necessary.
3.2 Faulty quick connect in the
system.
Inspect each quick connect and replace as
necessary.
3.3 Restriction in one of the
solution hoses.
Remove the quick connects and inspect hoses.
Clean or replace as necessary.
3.4 Hard water deposits
restricting the system.
Descale the truckmount.