Inspection and Maintenance
It is essential to regularly check for leaks in the joints, cylinders, floating oil seals, radiator plates, and water pipe connections of high-pressure pipes. If any leaks are found, they should be repaired immediately. Additionally, ensure that the electrical system is not disconnected or short-circuited, and that all terminals are securely fastened. Check the engine oil level by first confirming the oil pressure gauge and water temperature gauge are within normal ranges. Then, remove the dipstick and verify that the oil level is between the upper and lower markings. When adding oil, open the filler cap and pour in the appropriate amount. Always park the vehicle on a flat surface when checking the oil level, and never exceed the “H†mark on the dipstick.
Rear Axle Tank Oil Level Check:
(1) Initial Inspection and Maintenance after 250 hours: 1. Replace the fuel filter. 2. Replace the coarse and fine oil filters. 3. Change the oil in the gearbox and rear axle tank according to the table specifications. 4. Replace the working oil tank oil. 5. Replace the working oil tank filter element. 6. Replace the final transmission tank oil. 7. Clean the shifting steering filter. 8. Tighten the injector mounting screws. 9. Inspect and adjust the engine valve clearance.
(2) Inspection and Maintenance every 500 hours: 1. Replace the preservative reservoir. 2. Close the top two valves of the preservative reservoir. 3. Unscrew the filter cartridge to the left. 4. Apply engine oil to the sealing surface and install new components. 5. When installing, tighten the cover 1/2 to 3/4 turn after the sealing surface makes contact (do not over-tighten). 6. Open the valve after the replacement is complete.
Correct Repair
(1) Maintain Proper Track Tension
If the track tension is too tight, it can cause excessive stress on the guide wheel spring, leading to premature wear of the track pin and sleeve. This may also result in damage to the guide wheel bushing and reduced mechanical efficiency. On the other hand, if the track is too loose, it can cause misalignment, leading to instability, fluctuation, and increased wear on the guide wheel and rollers. Adjust the track tension by adding or releasing grease from the tensioning cylinder. Refer to the standard clearance for your model. If the track pitch becomes excessively elongated, consider replacing the track joint assembly or rotating the track pin and sleeve to restore proper meshing.
(2) Keep the Guide Wheel Centered
Misaligned guide wheels can significantly affect the entire traveling mechanism. To extend its lifespan, adjust the gap between the guide wheel and the crawler frame using shims. If the clearance is too large, remove shims; if it's too small, add them. The standard clearance should be between 0.5 to 1.0 mm, with a maximum allowable clearance of 3.0 mm.
(3) Rotate the Track Pin and Sleeve at the Right Time
As the track pin and sleeve wear, the track pitch may increase, causing poor meshing with the drive wheel and leading to damage. When this occurs, rotate the track pin and sleeve to restore the correct pitch. You can determine when to do this based on either a 3 mm increase in track pitch or a 3 mm reduction in the outer diameter of the pin sleeve.
(4) Tighten Bolts and Nuts in Time
Loose bolts in the running mechanism can lead to failure and serious issues. Regular inspections should include checking the mounting bolts for the roller, drive bolt, track shoe, roller guard plate, and diagonal strut head. Follow the manufacturer’s recommended torque specifications for each bolt.
(5) Ensure Timely Lubrication
Lubrication is crucial for the running gear. Many failures occur due to oil leaks that go unnoticed. Common leak points include the area between the retaining ring and shaft, the floating seal ring, the supporting wheel, and the cover of the roller. Regularly inspect and replace these parts according to the lubrication schedule to prevent damage and extend component life.
(6) Check for Cracks
Cracks in the traveling mechanism must be identified and repaired promptly to avoid further damage and potential failure.
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