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.
Parking brake is engaged (rear wheel motors).
Wheel motor will not turn
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.
System reset switch needs to be pressed.
Coring head will not lift or lifts slowly
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.
ProCore 648
Page 4 – 15
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro 648 |
| Download File |
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| Document Type | Service Manual |
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
Canada 1-888-225-4886 USA 1-888-384-9939, Lawn Mower |
| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
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