Steering - Troubleshooting; Hydrostatic Transmission - Troubleshooting - New Holland Workmaster 25S Operator's Manual

Problem
The three-point linkage
does not move down
when control handle is
moved to down position.
Oil leakage

Steering - Troubleshooting

Problem
Hydraulic steering system
does not work
Excessive steering wheel
effort
Cylinder movement not as
smooth as steering wheel
Oil leakage of steering
pump, steering unit,
cylinder
Abnormal noise

Hydrostatic transmission - Troubleshooting

Problem
When operating HST
pedal, tractor does not
move.
Tractor is still moving
when HST pedal is in
neutral position
HST power is low
8 - TROUBLESHOOTING
Possible Cause
Rate of drop control valve locked in closed
position
Lift shaft moving parts damaged
Connecting part loosened
Oil seal damaged
Pipe cracked
Possible Cause
Steering unit damaged or worn
Steering cylinder piston seal damaged or
worn
External oil leakage of oil tubes or hoses
Front axle is over loaded
Faulty power steering pump
Power steering relief valve: pressure set-
ting low
Air in steering line if not used for a long time Bleed air in steering system
Air in suction tube
Cylinder piston seal damaged
Seal damaged
Lack of oil
Restriction of oil flow in suction line
Air in system
Possible Cause
Park brake is engaged
HST range is in "N"
HST Filter clogged
HST control linkage worn or damaged
Incorrect neutral adjustment of HST linkage See your NEW HOLLAND dealer for ser-
HST pedal linkage damaged
Tractor is over loaded
Oil shortage
Air in HST circuit
HST filter clogged
Turn the knob counterclockwise, to open
valve
See your NEW HOLLAND dealer for ser-
vice
Tighten
See your NEW HOLLAND dealer for ser-
vice
See your NEW HOLLAND dealer for ser-
vice
See your NEW HOLLAND dealer for ser-
vice
See your NEW HOLLAND dealer for ser-
vice
See your NEW HOLLAND dealer for ser-
vice
Reduce the load on the front axle
See your NEW HOLLAND dealer for ser-
vice
See your NEW HOLLAND dealer for ser-
vice
Check suction tube, repair as needed
See your NEW HOLLAND dealer for ser-
vice
See your NEW HOLLAND dealer for ser-
vice
Add oil as needed
Replace filter
Bleed air from system
Release park brake
Place HST range in "L" or "H" range
Replace HST filter
See your NEW HOLLAND dealer for ser-
vice
vice
See your NEW HOLLAND dealer for ser-
vice
Reduce load from the tractor
Add transmission oil as needed
Check and repair the hydraulic suction line
Replace the HST filter
8-3
Correction
Correction
Correction