excavator final drive for Komatsu PC300-7 Travel Motor Assembly 708-8H-00320

excavator final drive for Komatsu PC300-7 Travel Motor Assembly 708-8H-00320

Name: travel motor assy Condition: New Warranty: 12months Standrd: ISO9001 Part No.: 708-8H-00320 Delivery: By air, ship or express Place o Origin: Shandong, China(Mainland) Package: Wood case or Pallets Delivery: ASAP or within 3 days after receiving the money Payment: TT or L/C at sight Huida...

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Product Details

Description:

Name: travel motor assy 

Condition: New

Warranty: 12months

Standrd:ISO9001

Part No.: 708-8H-00320

Delivery: By air, ship or express

Place o Origin: Shandong, China(Mainland)

Package: Wood case or Pallets

Delivery: ASAP or within 3 days after receiving the money

Payment: TT or L/C at sight



According to years of experience that the excavator can walk slowly and unable to repair, the following diagnoses are made for Komatsu PC300-7 walking slowly and unable to walk.


1. first test the speed of the arm, the bucket, the bucket and the revolving, and the overflow pressure. The numerical value is within the standard range, and the hydraulic pump, the self pressure relief valve, the main overflow valve, the main control valve and so on are all no trouble.


2. secondly, hold up the track on the right, and measure the time required for the track to rotate 5 times in the condition of the largest working condition of the throttle.


3. judging from this, there is no malfunction of walking motor, motor reducer, walking speed solenoid valve and so on.


4. then change the leading line of the walking guide line and the working device. That is, the moving arm descending lead line and the left forward advance guide line change, the bucket rod excavating leading line and the right forward advance guide line. At the same time, the operation arm drop and the bucket rod excavate the pilot valve, find the forward speed and the force are normal, but the bucket rod excavation The speed of the pilot valve is slow, so that the pilot valve of the walking can be judged to be faulty. After replacing the valve, the speed of the excavator will return to normal.

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