Troubleshooting - Haskel Q-Drive QGD Series Installation, Operation And Maintenance Manual

Troubleshooting

For actions, see "Inspection and Preventive Maintenance" and "About Service and Repair."
Problem
Oil leak at shaft.
Oil leak at inlets.
The direction of oil flow is
incorrrect.
Booster does not build
pressure.
Check valve is leaking.
Gas leak at vents.
Gas leaks externally
High outlet gas temperature.
Coolant leaks.
Q-Drive Installation, Operation, and Maintenance Manual
Possible Cause
A seal on the rod is worn.
A seal is extruding into the inlet
port.
Motor phase is incorrect.
External leakage is extreme.
A seal failed on the gas section.
Faulty check valve.
Improper check valve.
Seal has contamination.
Seal is extruded.
Broken or worn spring in poppet
valve.
The seal on the gas piston is
damaged.
The seal on the gas barrel is
damaged.
Inlet pressure is decaying.
Pump speed is too high.
Coolant flow is off or not
adequate.
The seal on the cooling jacket of
the gas barrel is damaged or
worn.
25 of 59
Action
Replace the rod seal.
Replace the seal on the port.
Shut down the system.
In order to reverse the direction of
the motor, 2 of the phases'
positions in the facility 3phase
supply cable need to be
exchanged.
Inspect the tubing, the end cap on
each gas section, and the seals
on the check valves.
Inspect gas vent for leakage
above 700 SCCM. If so, change
piston seal.
Inspect the check valve for
contaminants.
Verify that the IN label on the
body of check valve is matched
with the IN label on the end cap
of the gas section. Verify that
OUT labels match.
Repair check valve with the check
valve seal kit.
Replace the seal on the gas
piston.
Service the gas section.
Adjust the inlet pressure to within
recommended compression ratio.
Decrease the CPM rate to slow
the pump.
Inspect and service the cooling
system.
Perform service on cooling
system.