5-10t Internal Combustion Counterbalance Forklift Truck Operation & Maintenance Manual
Table 3-2 Insufficient Power
Part
Cause for Failure
Generation
Examination Method Removal Method
A. Too Low Oil
Pressure
(1)Oil Level Low Examining oil level Oil to be added
(2)Air Sucked at the Oil
Suction Side
Examining joint and oil pipe Joint to be
re-tightened and
sealing part to be
replaced
(3)Oil Filter Blocked Disassembling and examining To be cleaned or
replaced
(4)Displacement of Oil
Feed Pump Insufficient
Disassembling and examining To be replaced
(5)Main Overflow
Valve Disc Spring
Distorted
Examining spring tension
(6)Seal Ring or O-Ring
Damaged or Worn out
Disassembling and examining To be replaced
Torque
Converter
B. Flywheel Damaged
or Other Parts in
Collision
Extracting a small quantity of oil and
examining whether or not extraneous
substance exists
To be replaced
A. Improper Use of Oil
or Blistering
Examining
(1)Air Sucked at Oil
Suction Side
Examining joint and oil pipe Joint to be
re-tightened or
replaced
(2)Oil Pressure of
Torque Converter too
Low or Blistering
Measuring pressure Pressure to be
adjusted
B. Clutch Skidding
(1)Oil Pressure Low Measuring Pressure Pressure to be
adjusted
(2)Seal Ring Worn out Disassembling, examining, and
measuring
To be replaced
(3)Clutch Piston Ring
Worn out
Disassembling and examining
Transmission
(4)Friction Plate Worn Disassembling and examining start To be replaced
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