14
Troubleshoo ng
Problem
Possible Causes
Resolu ons
Pump will not Turn
1. No hydraulic fluid or pressure.
2. Bad hydraulic couplers or not
screwed together properly
3. Impeller jammed
4. Damaged gear motor
5. Impeller shaT to hydraulic
motor coupling problems.
1. Turn on power unit and test that
appropriate flow and pressure is available
with flow gauge and pressure meter.
2. Connect all supply and return hydraulic
hoses together, make sure all connec ons are
fully ghtened. Flow hydraulic fluid w/o
pump a8ached.
3. Remove any debris from the volute. This
includes rope, wire, rags, and nylon bags.
4. Replace gear motor
5. Check keyway for damage.
Poor Performance or
Low Flow Rate
1. Hydraulic flow reversed.
2. Improper hydraulic fluid
flow.
3. Pump inlet jammed.
4. Discharge hose is too small
5. Impeller Damage
6. Contaminated Hydraulic Fluid
7. Hydraulic motor worn out.
1. Make sure hoses are connected
properly, see Pump Diagram on page 5.
2. Turn on power unit and test that
appropriate flow and pressure is available
with flow gauge and pressure meter.
3. Clean the inlet and make sure any
debris is removed. Remove hydraulic
lines before servicing.
4. Use a bigger discharge hose to increase
flow rate
5. Replace Impeller, consider using debris
cage if pit contains rocks.
6. Drain bad oil out of hydraulic system
and clean out the tank with mineral
spirits and refill with new oil.
7. Inspect motor wall internals, if okay,
install new motor seal kit.
Hydraulic Back
Pressure
1. Return line not fully open
1. Check and ghten all connec ons.
2. Increase size of return hydraulic hose
