How to determine which parts of a Pneumatic Roofbolters need to be replaced?

I. Criteria for Judging Vulnerable Sealing Components
Seals are the most frequently replaced parts and can be judged by malfunctions without disassembling the machine:

1. Water Jacket Seal: If the drill cannot shut off the water, there is continuous leakage, or the water flow from the drill hole is significantly reduced/intermittently sprays water, and the problem persists after checking the water valve, it can be basically determined that the seal is damaged and needs to be replaced.

2. Air Leg Seal: If there is insufficient thrust of the outrigger, slow or no outrigger descent, or air leakage at the outrigger interface, it can be basically determined that the seal is worn and needs to be replaced; routine maintenance recommends mandatory replacement every 15-20 days, even if there is no fault.

3. Various Valve Assembly Seals: Damaged water valve seals will cause water to be unable to be shut off and leak; damaged air motor valve seals will cause insufficient motor power and unstable speed; damaged air leg valve seals will cause the outrigger to jam. After troubleshooting the corresponding air source/water pressure issues, it can be determined that the seal needs to be replaced. 4. Distribution Shaft/Main Spindle/Copper Sleeve Seal: If air or lubricating oil leaks at the corresponding location, the seal is considered faulty and needs replacement.

II. Judgment Criteria for Rotating/Mechanical Components

1. Bearings: Abnormal noise or significantly increased vibration from the motor after startup; the drill does not rotate after air supply is introduced, and disassembly reveals broken bearing balls and worn bushings after ruling out air source issues; insufficient motor power, which does not improve after cleaning the oil cup and filter. If any of these conditions are met, the bearing needs replacement.

2. Drill Bit/Drill Rod: Worn or chipped drill bit edges, significantly slower drilling speed; bent or deformed drill rod, worn and stripped threaded joints. If any of these conditions are present, the corresponding component needs replacement.

3. Air Inlet/Water Supply Pipe: Cracks or damage to the pipes, air or water leaks at the joints, which do not resolve the issue after tightening the joints, require replacement with a new pipe.

III. General Judgment Logic The corresponding component needs to be replaced if any of the following conditions are met:

1. The corresponding fault occurs, and after troubleshooting and eliminating external problems such as air supply, water pressure, and blockages, the fault persists;

2. The component has reached its regular replacement cycle (15-20 days for seals) and shows obvious aging, cracks, and wear;

3. Disassembly inspection reveals that the component is broken, deformed, or severely corroded, rendering it unusable.