Under what circumstances does the brake pump need to be replaced?

1. The brake is too soft: When the brake is stepped on, if you feel that the texture of the brake is significantly softer, the stability of continuously stepping on the brake is reduced, it may be due to poor sealing of the master cylinder the sub-cylinder piston. Perhaps the brake pipe appears to be ruptured somewhere, causing an oil leak. At this time, you need to investigate whether there are traces of brake fluid.

2. Sudden failure of the brake: When the car is braking, if you feel that it suddenly fails for a while, you need to investigate whether the brake fluid is losing, then check whether the master cylinder, the sub-cylinder the oil pipe have brake marks. If there is, it means that the brake master cylinder the sub-cylinder has already leaked very seriously, it must be repaired in time. It is very risky to know the consequences of brake failure.

3. The brake pedal does return returns slowly: If the pedal neither rises nor resists after stepping on the brake pedal, it is the so-called brake non-return phenomenon. At this time, you need to check whether the parts of the master cylinder the sub-cylinder are damaged. Secondly, this phenomenon appears. It may also be due to lack of brake fluid oil leakage.

Precautions:

After replacing the new master cylinder, it is necessary to completely drain the original brake fluid replace the new qualified brake fluid with the same standard. Try to mix the new the old the different brands, otherwise the brake master cylinder will be damaged.

Put the brake fluid into the oil cup in an appropriate amount, step on the brake plate, about 2/3 of the stroke, back forth several times, each time the distance is 5 seconds (depending on the situation, can be adjusted appropriately according to work experience), try to make the master cylinder full of brakes Oil, for forklifts, this can be adjusted by the sub-cylinder.

When connecting the brake master cylinder oil pressure pipeline (please check whether the brake oil pipe joint the master cylinder outlet thread standard are the same), it is necessary to check the seal of the master cylinder the connecting oil pipe joint.

Step on the brake plate several times, each time for a distance of 5 seconds (appropriate according to work experience), exhaust the air in the pump at the bleed screw of the master cylinder the sub-cylinder until no air bubbles come out. It must be drained (some total There is no bleed screw on the pump, it can be exhausted on the sub-pump).

Adjust the gap of the brake pad brake drum the stroke of the master cylinder the cylinder, add an appropriate amount of brake fluid in the oil cup.