PAGE 56 — MAYCO C30HDGA CONCRETE PUMP • OPERATION MANUAL — REV. #1 (09/09/19)
TROUBLESHOOTING
Table 5. Troubleshooting (Pump)
Symptom
Possible Problem
Solution
Clutch slipping
Material pressure build up in manifold
Delivery system is plugged. Clear obstruction from
manifold and/or delivery system
Worn clutch friction lining or damaged
springs
Replace clutch lining or rotor
Manifold is packing with material, incorrect
mix ratio
Verify correct mix ratio
Worn balls and seats
Replace
V belt slippage
Loose V Belt
Adjust tension
Cam roller bearing does not
ride on cam profile smoothly.
"Knocks"
Insufficient back pressure
Too short delivery system, add more hose as
necessary
Manifold cavitation
Passing oversized aggregate through valve seats
causing it to skip
Broken spring
Replace spring
Lubrication box has incorrect lubrication or
low lubrication
Inspect fluid level. Verify using 30 weight motor oil
Bent piston rod
Replace piston rod
Restricted drive rod, piston rod connecting
cross bolt too tight
Loosen piston rod cross bolt
Excessive lubrication box splash
Excessive oil
Overfilled. Reduce oil level
Normal slurry buildup increasing oil level
Cleanout lubrication box
Broken chain links
Over-stressed
Remove delivery system blockage. Adjust excessive
chain (slack) deflection
Chain/sprockets out of alignment
Align chain/sprockets
Lubrication box has excessive
concrete slurry
Material cups are worn
Replace material cups
Material cylinders are damaged or worn
beyond limit
Replace material cylinders
Material cylinder piston cups
squeal
Incorrect lubrication
Verify using 30 weight motor oil
Low on lubrication
Check fluid level
Oil is not level in lubrication box
Level machine
Pump output is diminished
(volcano effect in hopper)
Worn or dented balls and worn seats
Inspect and service balls and seats
Material accumulation in manifold
Inspect and clean manifold
Air entering T manifold
Replace "O" Rings
Radio remote has diminished
range of operation
Low battery power
Replace battery
Too many obstacles between pump and
transmitter
Minimize signal obstructions
Receiver and transmitter diminished
communication
Go through synching process
Loss of speed control, stays at
idle speed
Pump switch is not in the Pump ON
position
Place pump switch in Pump ON position
Hood is open
Close hood
Faulty hood switch or wiring
Troubleshoot hood switch and wiring