TROUBLESHOOTING
GEAR PUMP
1
5
GEAR PUMP
5I1AQ00
GEAR PUMP
“4. Disassembly and assembly, Gear pump”
Symptoms
Major causes
Remedies
No discharging operation • Direction of rotation is incorrect.
• Rotate in the rated direction.
• Hydraulic oil tank level is too low.
• Add oil to the specified level.
• Clogging in the suction piping or the
suction filter.
• Clean the piping.
• Viscosity of hydraulic oil is too high.
• Replace with hydraulic oil of proper viscos-
ity.
• RPM is too low.
• Run at the rated RPM.
Noise is too loud, unusual
sound is heard
• Cavitation is being produced due to the
crushed hose or clogged filter of the
suction side.
• Remove the dirt and correct the crushing.
• Joint in the suction side is loose and
sucking air.
• Retighten each joint.
• Cavitation is being produced due to too
high viscosity of the hydraulic oil.
• Replace with hydraulic oil of proper viscos-
ity.
• Pump and engine are not center
aligned.
• Center them again.
• Frothing of hydraulic oil.
• Investigate the cause of frothing and cor-
rect it.
Oil leak from the oil seal
• Oil seal is deformed, worn out or dam-
aged.
• Replace the oil seal.
Oil leak from the mating
surface between the
housing and the flange or
housing and the cover
• Body seal is damaged, or the sliding
part is worn out.
• Replace with a new one.
Discharge is insufficient
• Bushing seal is damaged.
• Replace the bushing seal.
• Cavitation is being produced.
• Clean the suction filter and the suction pip-
ing.
• Aeration is being produced.
• Check if piping is properly screwed in.
• Viscosity of hydraulic oil is too low.
• Replace with hydraulic oil of proper viscos-
ity.
Summary of Contents for TB215R
Page 1: ...CC8E005 WETB215R_A XI Seral No 215000003...
Page 3: ...SAFETY 1...
Page 13: ...SERVICE DATA 2...
Page 16: ...SERVICE DATA DIMENSIONAL DRAWING 3 2 DIMENSIONAL DRAWING 2A0AX001 Operating range 2A0AX02...
Page 53: ...SERVICE DATA WIRE HARNESS DIAGRAM 2 2 WIRE HARNESS DIAGRAM 2H0AX00 Body harness 03342 68000...
Page 54: ...SERVICE DATA WIRE HARNESS DIAGRAM 3 2 WIRE HARNESS DIAGRAM 2H0AX00...
Page 55: ...SERVICE DATA WIRE HARNESS DIAGRAM 4 2 WIRE HARNESS DIAGRAM 2H0AX00...
Page 56: ...SERVICE DATA WIRE HARNESS DIAGRAM 5 2 WIRE HARNESS DIAGRAM 2H0AX00...
Page 57: ...SERVICE DATA WIRE HARNESS DIAGRAM 6 2 WIRE HARNESS DIAGRAM 2H0AX00...
Page 58: ...FUNCTION 3...
Page 88: ...DISASSEMBLY AND ASSEMBLY 4...
Page 125: ...DISASSEMBLY AND ASSEMBLY OPERATING DEVICE 6 4 OPERATING DEVICE 4F0AX00 Hydraulic piping...
Page 230: ......
Page 232: ...TROUBLESHOOTING 5...
Page 287: ...Other 6...