What to do if the excavator is unable to climb the slope?

Climbing weakness phenomenon:

Recently, the excavator has shown that the excavator moves normally and vigorously when it is walking straight, but the excavator is weak when it is climbing. How can I remove the weakness of the excavator?

Cleaning methods for Komatsu PC130-7 excavator climbing weakness:

1 Check if there is air in the system, and exhaust if there is.

2 Check whether the suction filter is blocked, and replace the filter if it is blocked.

3 Check whether the oil outlet pipe of the pump is smooth.

4 Check the pilot pressure: connect a 60bar pressure gauge to the pilot pressure measuring point to see if the pressure meets the regulations (the specification is 34.5bar), if not, adjust the pilot pressure control valve, if it can't be adjusted, check the pilot pressure control valve : Whether the valve core is worn out (replacement or repair), the conditioning spring (standard length is 53.8mm) is tired or broken (replacement of the spring), whether it is stuck (removal of foreign objects), normal, the pilot gear pump may be faulty, repair or replace Gear pump.

5 The low pressure of the walking pilot oil will also cause the excavator to be unable to climb: check the walking pilot pressure, unscrew the screw plug on the walking pressure switch connector, connect the 60bar pressure gauge, and operate the walking pilot handle (the push should be greater than 30bar, part of it should be around 18bar); if it is abnormal, check to repair or replace the pilot valve, the first is: the stroke is not working (adjustment), the pressure regulating spring is too soft (replacement), the valve stem is stuck or worn (removal of obstruction or repair , Replace).

6 Check the pressure of the mutual injection relief valve: connect a 600bar pressure gauge to the pressure measuring ports of the front and rear pumps, jam the crawler, and operate the walking lever. The normal pressure should be 368bar. If the pressure is abnormal, try to adjust the mutual injection overflow. If the overflow pressure of the flow valve cannot be adjusted higher, check the inter-injection overflow valve. First, check whether the pressure regulating spring is tired (replacement) and the sealing cone (grinding). If the foreign body is stuck, remove the foreign body. If the injection relief valve is normal and the pressure is not high, proceed to the next step.

7 Check the leakage status of the center reversal joint: Disassemble the two high-pressure pipe joints on the left (right) side and block them with a plug, and operate the walking lever. If a lot of oil flows out from the two oil ports of the reversal joint, Clarify that the leakage is severe, repair and replace the seal (or reverse joint), and proceed to the next step if normal.

8 Check the motor leakage: disassemble the motor drain pipe, connect an oil pipe from the drain port to a container, operate the walking operating lever, if the leakage is severe, repair and replace the motor; the motor leakage is at 200bar pressure, per minute Do not exceed 15l; (You can also check this: disassemble the high-pressure oil pipe of the motor, block it with a plug, and read the pressure value.If the pressure is higher than the original, it is the motor leakage).

9 Check the multi-way valve. If the valve stem of the multi-way valve is stuck in a semi-closed position or the cooperation gap is too large and the leakage is severe, it will cause weakness.

10 Incomplete braking exemption causes the excavator to be unable to climb the slope: the main reasons that cannot be completely exempted are: A, the brake pilot valve is stuck by a foreign body (removed); B, the brake cylinder oil seal is damaged and leaks (replace the seal) ; C, the oil passage from the balance valve to the brake pilot valve is blocked (removed). If everything is normal, the motor bearing or the reduction mechanism may be stuck, check and remove foreign objects. The above content mainly introduces the PC130-7 Komatsu excavator that is weak Ways to clean up problems.