自上料攪拌車復位慢的表現是自動上料攪拌車在制動減速后，松開制動踏板，車速不能很快地提高，嚴重的甚至難以起步，水泥自動上料攪拌車發生制動發咬的故障后，可以按如下步驟檢查并排除：

The slow reset of the self loading mixer truck shows that after the automatic loading mixer truck is braked and decelerated, the brake pedal is released, the speed can not be increased quickly, and it is even difficult to start seriously. After the braking bite fault of the cement automatic loading mixer truck occurs, it can be checked and eliminated according to the following steps:

1、如果踏板自由行程適當，主制動閥排氣口有氣體排出，掛檔起步，如果能起步，行駛一段距離應檢查制動鼓是否發熱，如發熱一般是由于制動蹄和制動鼓間隙太小所致。應檢查制動蹄和制動鼓的間隙，使之保持正常。

1. If the free stroke of the pedal is appropriate and there is gas discharged from the exhaust port of the main brake valve, start in gear. If you can start, check whether the brake drum is hot after driving for a certain distance. If it is hot, it is generally due to the small gap between the brake shoe and the brake drum. Check the clearance between brake shoe and brake drum to keep it normal.

2、如果不能起步，可踩下踏板，將變速桿置于空檔，然后在松開制動踏板的同時，檢查各制動氣室的推桿能否回位。如果是某個制動氣室的推桿不能回位，即是繼動閥卡死，或是制動蹄回位彈簧太軟，斷裂造成的，或者是前制動蹄銷銹死造成的。

2. If you can't start, step on the pedal, put the gear lever in neutral, and then check whether the push rod of each brake chamber can return while releasing the brake pedal. If the brake shoe is too rusty, or the front brake shoe is stuck, or the air brake shoe cannot return to the position.

3、檢查制動踏板的自由行程，或者是在貯氣筒氣壓達到規定之后，踩下制動踏板，然后在松開踏板的同時檢查主制動閥的排氣口有無氣體排出，如無氣體排出，踏板無自由行程，說明是主制動閥的排氣閥打不開，應調整主制動閥拉桿，使主制動閥的活塞桿和排氣閥之間有正常的間隙，使制動踏板保持正常的自由行程。

3. Check the free stroke of the brake pedal, or press the brake pedal after the air pressure in the air reservoir reaches the specified value, and then check whether there is gas discharge at the exhaust port of the main brake valve while releasing the pedal. If there is no gas discharge and the pedal has no free stroke, it indicates that the exhaust valve of the main brake valve cannot be opened, and the pull rod of the main brake valve should be adjusted, Make sure there is a normal clearance between the piston rod of the main brake valve and the exhaust valve, and keep the brake pedal at a normal free stroke.