Takeuchi TB 250, Руководство по ремонту

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TROUBLESHOOTING
5
5-1
Overall machine ............................................................................................................................................................. 5-3
No operation is possible. .......................................................................................................................................... 5-3
All systems working, but insufficient power. .............................................................................................................. 5-4
Boom, bucket, slew and arm fail to move or are too slow. ........................................................................................ 5-6
Traveling ........................................................................................................................................................................ 5-8
Right or left travel is impossible ................................................................................................................................ 5-8
Right or left travel speed drops causing the machine to veer to one side ................................................................ 5-10
Machine will not travel in 2nd speed ....................................................................................................................... 5-12
Slewing ...................................................................................................................................................................... 5-15
No slewing ............................................................................................................................................................. 5-15
Does not slew to the right or left ............................................................................................................................. 5-17
Slewing is slow or lacks power ............................................................................................................................... 5-19
The machine slews, but the overrun when slewing stops is large, or slewing cannot be stopped ........................... 5-21
When stopped on a slope, the slewing mechanism cannot maintain its posture ..................................................... 5-23
Boom ......................................................................................................................................................................... 5-24
The boom cylinder does not move ......................................................................................................................... 5-24
Boom cylinder operation is slow or lacks power ..................................................................................................... 5-26
When the boom control lever is pulled slowly, the boom drops at first .................................................................... 5-29
Spontaneous drop of the bucket is too large .......................................................................................................... 5-30
Arm ............................................................................................................................................................................. 5-31
Arm cylinder does not move ................................................................................................................................... 5-31
Arm cylinder is slow or the power is insufficient. ..................................................................................................... 5-33
Spontaneous drop of the arm is too large .............................................................................................................. 5-35
Bucket ......................................................................................................................................................................... 5-36
Bucket cylinder does not move or lacks power ...................................................................................................... 5-36
Spontaneous drop of the bucket is too large .......................................................................................................... 5-38
Boom swing ................................................................................................................................................................ 5-39
Swing cylinder does not move ................................................................................................................................ 5-39
Blade ........................................................................................................................................................................... 5-41
Blade cylinder does not move or lacks power ........................................................................................................ 5-41
The spontaneous drop of the blade is too large, or the blade cannot support the machine ..................................... 5-43
Auxiliary hydraulics ...................................................................................................................................................... 5-45
Proportional control does not work ......................................................................................................................... 5-45
Piston pump ................................................................................................................................................................ 5-46
Gear pump .................................................................................................................................................................. 5-47
Control valve ................................................................................................................................................................ 5-48
Pilot valve .................................................................................................................................................................... 5-50
Proportional control solenoid valve ............................................................................................................................... 5-51
Cylinders ..................................................................................................................................................................... 5-52
Travel motor ................................................................................................................................................................ 5-53
Slew motor .................................................................................................................................................................. 5-55
Air conditioner ............................................................................................................................................................. 5-57