Greensmaster 3250--DHydraulic System Page 4 -- 24
Traction Circuit Problems
Problem Possible Cause
Neutral is difficult to find or unit oper-
ates in one direction only.
External traction control linkage is misadjusted, disconnected, bind-
ing or damaged.
Piston (traction) pump is worn or damaged (see Piston (Traction)
Pump Flow Test).
Traction response is sluggish. Hydraulic oil is very cold.
Brakes are binding or are incorrectly adjusted.
Piston pump by--pass valve is open or defective.
Charge pressure is low (see Charge Pressure Relief Valve Pres-
sure Test).
Piston pump relief valves are leaking or damaged.
Piston (traction) pump or wheel motor(s) are worn or damaged (see
Piston (Traction) Pump Flow and Wheel Motor Efficiency Tests).
No traction exists in either direction. Brakes are binding or are incorrectly adjusted.
Oil level in reservoir is low (other hydraulic circuits affected as well).
Piston pump by--pass valve is open or defective.
Charge pressure is low (see Charge Pressure Relief Valve Pres-
sure Test).
Piston (traction) pump or wheel motor(s) are worn or damaged (see
Piston (Traction) Pump Flow and Wheel Motor Efficiency Tests).
Wheel motor will not turn. Brakes are binding or are incorrectly adjusted.
Key on wheel motor shaft is sheared or missing.
Wheel motor is damaged.
Wheel motor will not hold load in
neutral.
Make up fluid from charge pump is not available.
Piston pump relief valves are leaking or damaged.
NOTE: ThepistonpumpusedonGreensmaster
3250--Dmachinesisequippedwithreliefvalvesforboth
theforwardandreversedirection.Dueto engineoutput,
it is unlikely that traction pressure will reach relief valve
settings. If, however, a piston pump relief valve is leak-
ing or otherwise faulty, traction performance would be
affected.
To Next Page
Loading...
Need help?
General
