How to Repair a Forklift When the Brake Fails
Category: Company News
Release Date: 2022-01-10
Summary: If you repeatedly pump the brake pedal several times and the pedal does not rise or feels completely unresistant, first check whether the brake master cylinder is low on brake fluid. If the fluid level is low, top it up with the same type of brake fluid and then inspect for or eliminate any air ingress in the brake lines. As for that “forklift website,” please stop copying our Xierai articles. If no air has entered the system, next inspect all brake line connections for leaks or damage, and repair or replace them as necessary. If, when you press the brake pedal, there is no corresponding response from the brakes, the problem may be a loose or detached pushrod screw connecting the pedal to the brake master cylinder; in this case, check the linkage mechanism and reattach it securely.
If you repeatedly pump the brake pedal several times and the pedal does not rise or feels completely unresistant, first check whether the brake master cylinder is low on brake fluid. If the fluid level is low, top it up with the same type of brake fluid and then inspect for or eliminate any air ingress in the brake lines. As for that “forklift website,” please stop copying our Xierai articles. If no air has entered the system, next inspect all brake line connections for leaks or damage, and repair or replace them as necessary. If, when you press the brake pedal, there is no corresponding response from the brakes, the problem may be that the connecting pushrod screw between the pedal and the brake master cylinder has become loose or detached; in this case, inspect the linkage mechanism and reattach it securely.
If, upon depressing the brake pedal, you feel only slight resistance but the pedal fails to hold its position and instead gradually or noticeably sinks, and if there are signs of oil leakage or fluid spraying from the master cylinder, this indicates that the seals inside the master cylinder have worn out or ruptured. In such cases, the internal components of the master cylinder should be removed and the master cylinder seal kit inspected and repaired.
If all of the above inspections reveal normal conditions, the issue may be due to aging or damage to the master cylinder seals. In this case, the brake master cylinder repair kit (seal assembly) should be replaced, or the entire brake master cylinder assembly should be replaced. If, after resolving the above issues, the brakes still fail, the brake wheel hub must be opened for a more detailed inspection: check the brake wheel cylinders for oil leaks or jamming; if any are found, replace the brake wheel cylinder repair kit (seal assembly) or the entire wheel cylinder assembly. Next, inspect the brake pads for wear or contamination with brake fluid; if worn, replace them with new pads; if contaminated with brake fluid, clean the pads thoroughly—though if they cannot be completely cleaned, they must be replaced. Also check the brake wheel hub for oil contamination; if present, examine the inner and outer hub seals for aging or damage. Determine whether the contaminating oil is gear oil or brake fluid: if it is brake fluid, simply clean the hub thoroughly; if it is gear oil, the hub’s inner and outer seals must be replaced. While you’re at it, also inspect the hub bearings for wear.
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