Muncie E Series Troubleshooting Manual

Condition
No oil flow from pump.
Pump will not build/hold pressure.
Pump is noisy.
PumP leaks:
at shaft seal.
at body section.
at pump port.
E/EH Series Dump Pump

TroubleshooTing guide

Likely Cause
No oil in reservoir.
Closed shut-off valve.
Air lock in pump inlet hose.
Pump is wrong rotation for application.
PTO not engaged.
Pump worn or damaged.
Relief valve stuck open.
Contaminate stuck in load check valve.
Pump worn or damaged.
Aeration (air in system).
Cavitation– (Cavitation is caused by
excessive vacuum at the pump inlet. Test
with a vacuum gauge at the inlet port.
Gauge should register under 5 Hg/in. at
normal operating speed and temperature.)
Dirt under seal.
Damaged seal or pump body.
Improperly fitted seal.
Damaged o'ring or body.
Improper torquing of bolts.
Loose fitting.
Damaged fitting.
Damaged pump body.
muncie Power Products, Inc.
Correction
Fill reservoir with approved fluid.
Open valve.
Use compressed air to pressurize reservoir
while running pump or fill inlet hose with
oil from the pump end.
Direct Mount Type– Re-configure pump to
correct rotation.
Remote Mount Type– Connect driveshaft
to correct shaft as indicated by directional
arrows.
See "PTO Troubleshooting"
Repair or replace pump.
Remove, clean, and re-set to specification.
Remove relief valve cartridge and clean
load check area.
Repair or replace pump.
See "Oil foaming".
• Increase inlet hose size.
• Re-route inlet hose.
• Check for kinked or collapsed inlet hose.
• Check for clogged reservoir breather or
strainer.
• Inlet hose should be S.A.E. type 100R4
hose only.
Replace seal. Examine pump shaft for
scoring.
Replace seal or body section.
Replace seal.
Replace o'ring or body section.
Torque to specification.
Tighten fitting.
Replace fitting.
Replace body section.