User's Manual

309024 19
Troubleshooting
Problem Cause Solution
System won’t run or stops while
r nning
Air pressure or volume too low Increase, check air compressor.
running
Closed or restricted air line or air
valve
Open or clean as required.
Fluid valves closed Open fluid valves.
Clogged fluid hose Replace fluid hose.
Air motor worn or damaged Service air motor; see manual
306982.
Displacement pump stuck Service displacement pump. See
manuals listed in the chart on
page 18.
Fluids not mixing properly
Clogged filter in fluid line Clean; replace element if neces-
sary.
Manifold problems Refer to manual 307400.
Check ratio Check; replace pump.
Clogged fluid hose Replace fluid hose.
System speeds up or runs
erraticall
Fluid containers are empty Check often – keep filled.
erratically
Displacement pump parts worn or
damaged
Service displacement pump. See
manuals listed in the chart below.
Squeaking or knocking noise is
heard
Bearing(s) dry or worn Lubricate; replace bearing(s) if
necessary.
Pump bottoming out See below.
System stops running on the end
of a stroke
Secondary displacement pump
bottomed out because ratio index
clamp was set too far out
Adjust ratio index clamp.
Secondary displacement pump
bottomed out because top pivot
bearings are set too high
Adjust bearings. See Removing
the Lever Arm from the VRHC
Frame on page 21.