Page 4 – 20Hydraulic System
Sand Pro & Infield Pro 3040/5040
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Traction response is sluggish.
Hydraulic oil is very cold.
External pump control linkage is misadjusted, disconnected, bind-
ing or damaged.
Charge pump (P2) pressure is low.
Accelerator valves in hydrostat are faulty.
Hydrostat and/or wheel motor(s) is/are worn or damaged.
No traction movement exists in
either direction.
Parking brake is applied.
Hydraulic oil level in tank is low.
External pump control linkage is misadjusted, disconnected, bind-
ing or damaged.
Hydrostat coupler is damaged.
Charge pump (P2) pressure is low.
Accelerator valves in hydrostat are faulty.
Charge check valves in hydrostat are stuck or damaged.
Charge pump is worn or damaged.
Hydrostat and/or wheel motor(s) is/are worn or damaged.
Wheel motor will not turn.
Parking brake is applied.
Wheel motor is damaged.
Wheel motor will not hold load in
neutral.
Make up fluid from charge pump is not available.
Hydrostat check valves are faulty or damaged.
Attachment will not lift or lifts slowly.
Engine speed is too low.
Lift cylinder linkage is binding or broken.
Lift arm bushings are binding.
Hydraulic oil level in tank is low.
Charge pump (P2) pressure or flow is insufficient.
Charge pump (P2) is worn or damaged.
Implement relief valve (R1) is stuck open.
Lift cylinder leaks internally.
Lift control valve is defective.
Attachment raises, but will not stay
up.
Lift cylinder leaks internally.
Check valve within the lift control valve leaks.
Turning steering wheel turns ma-
chine in the opposite direction (Sand
Pro 5040 and Infield Pro 5040).
Hoses to the steering cylinder are reversed.
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