Yanmar Excavator Hydraulic Pump: Your Ultimate Guide to Maintenance and Replacement

1. When walking on the construction site, please try to place the travel motor behind the walking to reduce the squeezing of the sprocket.

2. The continuous walking time of the machine cannot exceed 2 hours. The walking time on the construction site should be minimized. If necessary, it is recommended to walk after a short stop in the middle.

3. Avoid raised hard objects when walking to avoid stress concentration on the track chain.

4. Confirm the tightness of the crawler, adjust the crawler tighter in soft places such as soil, and adjust the crawler looser when walking on stones. It is not good to have a crawler that is too loose or too tight. Too loose will cause the crawler to derail easily, and too tight will cause the chain sleeve to wear too quickly.

5. Check whether there are foreign objects such as stones in the crawler frequently, and clean them if there are.

6. When working on a muddy construction site, it is necessary to frequently idle to discharge the soil deposited in the crawler.

7. Try to avoid the excavator turning in circles on the spot.

8. Regularly check the rail guard and the rail guard welded under the guide wheel.

The pressure relief valve protects the hydraulic system from damage caused by excessive pressure by releasing excess hydraulic oil when the pressure exceeds the set value.

Blue smoke when starting a cold car: It is normal for a cold car to emit blue smoke and disappear after the car is heated, because a small amount of oil will invade the engine combustion chamber after the shutdown. Continuous blue smoke after starting:

1. The diesel filter is clogged, check whether the oil type is correct;

2. The engine piston ring and valve oil seal are worn, affecting the oil in the intake or exhaust pipe, which causes the excavator to emit blue smoke;

3. The clearance between the piston and the cylinder liner is too large, causing blue smoke;

Air entering the hydraulic oil will cause unstable system pressure, reduced pump efficiency and abnormal noise.

Regularly check and replace air filters, clean the air filter housing, ensure the intake lines are not clogged, and inspect the air filtration system for proper sealing to prevent dust from entering the engine.