Date：2025-06-21
Page View：1510
1、 Hydraulic system malfunction
Insufficient pressure
Reason: Fatigue of the pressure regulating valve spring, stuck or worn valve seat cone surface.
Solution: Adjust the limit nut or replace the spring; Disassemble and clean the valve seat, repair the damaged cone surface.
Oil temperature too high
Reason: Insufficient fuel in the fuel tank, damaged fuel pump, or improper selection of working pump.
Solution: Supplement hydraulic oil to the standard level; Repair or replace the oil pump; Match the working pump with the rated pressure according to the instruction manual.
2、 Power transmission failure
The oil pump is not refilling/the oil level is insufficient
Reason: Insufficient fuel in the fuel tank, clogged filter, clogged intake or ventilation holes in the suction pipe.
Solution: Add oil to the calibrated liquid level; Clean or replace the filter; Tighten the pipe joint and unclog the ventilation hole.
Coupling heating
Reason: Excessive wear of the elastic ring and large deviation in coaxiality between the power machine and clutch.
Solution: Replace the elastic ring; Re calibrate the coaxiality of the assembly (error ≤ 0.1mm).
3、 Mechanical component failure
The winch brake slips
Reason: The brake belt is stained with oil or the brake clearance is too large.
Solution: Clean oil stains with gasoline; Adjust the gap between the brake band and the brake wheel to 0.5-1mm.
Clutch slippage
Reason: Friction plate wear and tear, aging of compression spring.
Solution: Replace the friction plate (if the thickness wear exceeds 30%, it needs to be scrapped); Synchronously replace the broken spring.
4、 Key points of preventive maintenance
Daily inspection: Tighten bolts (key parts torque ≥ 1100N · m), clean oil stains, lubricate drill pipe joints and reducers (NLGI grade 2 butter) for each shift.
Oil management: Strictly select hydraulic oil according to the viscosity specified in the manual (68 # in summer and 46 # in winter), and regularly replace the filter (recommended for 2000 hours).
Environmental adaptation:
During underwater operations, the drill pipe should be exposed 1-2 meters above the water surface to prevent sediment intrusion;
Rust prevention treatment should be carried out after shutdown on rainy and snowy days, and the tracks should be loosened when parked for a long time.
Operation warning:
It is prohibited to reverse the drill rod during drilling to prevent detachment;
Abnormal noise/vibration should be immediately stopped to prevent the fault from escalating.
Following the above plan can reduce the failure rate by over 60% and extend the lifespan of the equipment. Please refer to the equipment manual for specific parameters. For complex faults, it is recommended to contact professional maintenance personnel.
Shandong Yuanquan Machinery Co., Ltd.
Whatsapp:+86 13864845057
Email: aileenzhang121@outlook.com
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Shandong Yuanquan Machinery Co., Ltd.
