CYLINDER GP-STICK 4781346 - Caterpillar

Problem 1
The front service brakes do not operate.Probable Causes
The front accumulator is damaged or faulty.
A seal in the internal brake line or in the brake group is damaged or worn.
The brake pump failed or the brake pump is damaged.
The brake group is damaged within the interfaces between the spindles and the axle housings.Problem 2
The rear service brakes do not operate.Probable causes
The rear accumulator is damaged or faulty.
A seal in the internal brake line or in the brake group is damaged or worn.
The brake pump failed or the brake pump is damaged.
The brake group is damaged within the interfaces between the spindles and the axle housings.Problem 3
The service brakes slip.Probable causes
A seal in the internal brake line or in the brake group is worn or damaged.
The brake discs in the brake group are worn.Problem 4
The service brake application is uneven.Probable causes
There is air in the hydraulic oil for the brake group.
There is excessive wear on one or more brake discs and on the associated components in the brake group.
The brake valve is sticking or damaged.Problem 5
Too much force is needed in order to depress the brake pedals.Probable causes
The brake pedals and the pedal linkages are damaged.
The brake valve is sticking or damaged.
Pedal movement to the cab floor is obstructed.Problem 6
The warning for low brake oil pressure will not turn off.Probable causes
The hydraulic oil temperature is too high.
The brake pump is worn or damaged.Problem 7
The parking brake does not hold the machine in place.Probable causes
The parking brake must be adjusted.
The brake linings are worn.
There is grease or oil on the brake drum and on the brake lining.