Filter
Top Products
ProCore 648 Hydraulic SystemPage 4 – 15
Problem Possible Cause
No traction in either direction Parking brake is engaged.
Oil level in reservoir is low.
Traction pump by–pass valve is open.
Pump drive belt is loose, worn or broken.
Traction cable broken or damaged.
Charge pressure is low.
Hydraulic pump pulley not secure to pump shaft.
Traction pump or wheel motor(s) are worn or damaged.
Wheel motor will not turn Parking brake is engaged (rear wheel motors).
Key on wheel motor shaft is sheared or missing.
Internal parts in wheel motor are damaged.
Wheel motor will not hold load in
neutral
Make up fluid from charge pump is not available.
Wheel motor(s) is/are worn or damaged.
Coring head will not lift or lifts slowly System reset switch needs to be pressed.
Engine speed is too low.
Reservoir oil level is low.
Pump pulley drive belt is loose or worn.
Lift cylinder is binding.
Coring head is binding.
Lift control manifold relief valve (R1) is stuck open.
Lift control manifold orifice (ORF1) is damaged or plugged.
Lift control manifold SVQ cartridge valve solenoid is not being
energized.
Gear pump (P2) is worn or damaged.
Coring head raises, but will not stay
up
Lift control manifold SVL cartridge stuck open.
Lift control manifold SVL cartridge valve leaks.
Hydraulic
System