Forklifts brake deviation Troubleshooting

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Forklift brake deviation (also known as brake unilateral) failure is the braking system common faults, it

refers to the forklift individual wheel brake is not working, leaving the vehicle braking effect of unbalanced

braking. wheel to the brake is not working in the opposite direction deflection dangerous situation,

especially in slippery road surface. Deviation brakeforklift fork extension
moment in almost out of control, can easily

result in the forklift off the ditch and crashed roadside goods, even forklift rollover or injured innocent

pedestrians and other serious accidents, so this must not be taken lightly .
1, the brake principles of forklift: forklift driver depresses the foot brake pedal push rod to promote the

brake master cylinder piston, the brake fluid in the master cylinder fuel tank pressure through the tubing to

the left front wheel brake wheel cylinders , open the wheel cylinder piston brake fluid, brake shoe opening

pressure to the wheels solid associated with the brake drum, brake drum, a direction opposite to the direction

of wheel rotation friction torque, due to the wheels and the road adhesion, the road wheel to produce a

backward force, braking force, braking force from the wheel by the axle,skid steer rock buckets
suspension passed to the frame and

body, forcing the entire forklifts have some deceleration. Therefore, the bra king performance good or bad

depends on three factors:
(1) brake shoe tension;
(2) brake shoe drum friction coefficient;
(3) between the tire and road adhesion coefficient.
2, the brake of the reasons for deviation: the root cause of the deviation brake is about the numerical growth

rate of brake wheel braking force (brake reaction time) or the end of the braking force difference is too

large (eg, ≥ l5%), so that forklift on both sides of the brake deceleration was due to a difference.
Forklift brake deviation phenomenon in three ways:
2.1 deviation phenomenon: usually slow down the deviation brake, emergency brake deviation (the root cause is

the growth rate of braking force significantly unequal, but in the end of the braking force or less).
The reason may be:
â'  left and right wheel brake shoe return spring elastic range;
â'¡ a wheel cylinder cups expansion expansion or brake shoe off the rust issuing.
2.2 deviation phenomenon: deceleration emergency braking deviation (the root cause of the failure rate of

increase of the braking force and the ultimate braking force ranging from obvious).
The reason may be:
â'  a wheel brake friction disc burning, surface hardening, exposed rivets, wet or contaminated with oil

(commonly known as wheel thrown oil);
â'¡ a brake wheel hoof drum gap is too large or too small contact surface;
â'¢ about wheel braking friction plate material is significantly different;
The â'£ oval of a brake drum through the large, smooth hardening or brake drum inside diameter of about

difference is too large;
â'¤ a brake wheel cylinders, air hose aging, bad cup, oil spills or wear off very;
â'¥ the left and right tire pressure or the degree of wear and tear are significantly different;
â'¦ a wheel bearing Song kuang the the;
â'§ a wheel brake plate deformation or Songkuang;
â'¨ brake at the ground around the adhesion coefficient is significantly different, such as the side of the

brake wheel is now smooth steel or contaminated with oil on the ground.
2.13 deviation phenomenon: Brake feel is a Comparative Study and Integration.