Multiquip LS-300P - Manual (Page 74)

PAGE 74 — MAYCO LS300P CONCRETE PUMP • OPERATION MANUAL — REV. #0 (06/09/14)
TROUBLESHOOTING (PUMP)
Troubleshooting (Pump)
Symptom Possible Problem Solution
Main Hydraulic Cylinder will
not cycle
Incorrect System Operating Pressure Check the pump pressure gage. Verify it is
approx. 3100 — 3200 PSI
Incorrect Engine RPM setting
Verify the engine's high RPM speed is set to
2550
Contaminated Main Relief Valve
Check the manifold for a contaminated Relief
Valve
Obstructed Material Cylinders
Check for obstructions (dried material) inside
the cylinders
Shuttle Cylinder slow to
complete stroke
Improper Flow Control setting Fully open Flow Control Valve
Incorrect Engine RPM setting
Verify the engine's high RPM speed is set to
2550
Incorrect Main Hydraulic
System Operating Pressure
Check the pump pressure gage. Verify it is
approx. 3200 PSI
Hopper Discharge Nipple Seal
improperly lubricated
Check the Hopper Discharge Nipple Seal for
seizing and lack of lubricant
Concrete slurry in
lubrication box
Worn or defective urethane cups or
worn material cylinder
Replace
Material cylinder piston
cups squeal
Low on lubrication Check oil level
Battery voltage falls below
12VDC on digital display,
causing engine not to start
Blown out Fuse Check the fuse
Dead battery Check the charge on the battery
Wiring connection inside Control Box Check the wiring connections and verify power
is reaching ignition switch