New Holland Boomer 41, Руководство оператора

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8 - TROUBLESHOOTING
Problem
Possible Cause Correction
Air in the hydraulic suction pipe Tighten the hydraulic filter and check all hy-
draulic suction connections
Hydraulic filter clogged Replace hydraulic filter
Faulty hydraulic pump Check pump for proper flow replace pump
if needed
Faulty control valve Check hydraulic control valve and linkage
for proper operation repair as needed
Faulty hydraulic lift cylinder Repair lift cylinder as needed
Faulty hydraulic relief valve Check hydraulic system for correct pres-
sure setting, repair as needed
Oil leakage Connecting part loosened Tighten
Oil seal damaged Replace
Pipe cracked Replace
The 3-point linkage does
not move down when
control handle is moved
to down position. Down speed control valve locked in closed
position Turn the knob counterclockwise, to open
valve
Control valve failure Repair or replace valve
Hydraulic lift cylinder damaged
Repair cylinder as needed
Lift shaft moving parts damaged Repair or replace lift shaft parts as needed
Steering - Troubleshooting
Problem Possible Cause Correction
Hydraulic steering system
does not work Faulty power steering pump Replace pump if needed
Steering unit damaged or worn Repair or replace unit as needed
Steering cylinder piston seal damaged or
worn Repair cylinder as needed
External oil leakage of oil tubes or hoses Repair or replace tubes or hoses as
needed
Excessive steering wheel
effort Steering unit: Spline and column spline
does not align Check mounted condition of steering unit
and column
Steering unit: Spool and sleeve damaged
by foreign material Replace steering unit
Steering unit: Excessive tightening torque
of end cap bolt Apply proper torque of end cap hardware
Pump: Low flow Increase engine RPM, to increase pump
flow
Faulty power steering pump Check pump , repair or replace if needed
Power steering relief valve: pressure set-
ting low Check power steering relief valve pressure
adjust to proper pressure setting
Cylinder movement not as
smooth as steering wheel Air in steering line if not used for a long time Bleed air in steering system
Air in suction tube Check suction tube, repair as needed
Cylinder piston seal damaged Repair cylinder as needed
Front wheels turn the
opposite direction to the
steering wheel direction Incorrect assembly of steering gear Repair steering gear as needed
Incorrect assembly of steering hoses Assemblel steering hoses correctly
Oil leakage of steering
pump, steering unit,
cylinder Seal damaged
Replace seal
Abnormal noise Lack of oil Add oil as needed
Restriction of oil flow in suction line Replace filter
Air in system Bleed air from system
8-3