Toro Workman 3000 Series Service Manual page 371

Problem
Difficulty in connecting or disconnecting quick
couplers.
Attachment does not function.
Box drops from raised position with lift valve in cen-
tered position.
Power steering hard.
Workman 3000/4000 Series
Possible Causes
Pressure not relieved (coupler under pressure – en ­
gine running).
Remote hydraulic valve not in float position.
Quick couplers not fully engaged.
Quick couplers are interchanged.
Pump drive belt loose.
Sheared key on pump shaft.
Hydraulic oil level low.
Low engine RPM.
Excessive load.
Low pump flow or pressure – TEST NO. 1.
Remote hydraulics relief valve stuck open damaged
– TEST NO. 2.
Remote hydraulic valve worn or damaged.
Hydraulic component(s) on attachment malfunction­
ing or damaged.
Improperly positioned valve.
Dump valve worn or damaged.
Internal leakage of lift cylinder(s).
Lift cylinder hydraulic lines or fittings leaking.
Remote valve not in neutral or float position or
Remote hydraulic valve linkage out of adjustment.
Pump drive belt loose. NOTE: A loose pump drive
belt will also cause the box not to lift or other attach­
ment to not operate.
Low engine RPM.
Hydraulic oil level low.
Hydraulic oil overheated.
Low pump flow or pressure – TEST NO. 1.
NOTE: Low pump flow or pressure will also cause
the box not to lift or other attachment to not operate.
Power steering gear worn or damaged.
Page 9 – 11
Hydraulic System