ENGINE AR 2231553 - Caterpillar

Specifications
Table 1
950K and 962K Parking Brake Actuator Pressure    
Date     Equipment ID Code    
Pressurized Actuator    
12500 to 15000 kPa (1800 to 2200 psi)    
Maximum Pressurized Actuator (1)    
25000 kPa (3600 psi)    
( 1 ) Do Not ExceedIntroduction
This information includes the following adjustment procedure:
Parking Brake Actuator - AdjustAdjustment Preparation
ReferenceDisassembly and Assembly, "Parking Brake - Remove and Install".
Park the machine on a smooth, level surface.
Place the transmission control in the NEUTRAL position.
Lower the bucket and/or any work tools to the ground.
Engage the parking brake.
Shut off the engine.
Place blocks in front of the wheels and behind the wheels.
Illustration 1 g02717901
Steering Frame Lock (1) Steering frame lock in LOCKED position
Install the steering frame lock.
Allow only authorized personnel on the machine. Keep unauthorized personnel off the machine and in clear sight of the operator.
Disengage the parking brake.
Remove the parking brake. The parking brake must be disassembled in order to perform the adjustment procedure.ReferenceFor information on removing and disassembling the parking brake, refer to Disassembly and Assembly, "Parking Brake - Remove and Install".Note: Be sure to avoid getting any grease or dirt on the brake shoes. Grease and dirt on the brake shoes greatly reduces the effectiveness of the parking brake.Adjustment Procedure
Illustration 2 g02718106
View of Parking Brake and Parking Brake Group
Illustration 3 g02717948
Illustration 4 g02717969
(2) Brake camshaft (3) Brake drum (4) Starwheel (5) Brake shoes (6) Brake group
Place brake group (6) into the brake drum (3) .
Rotate starwheel (4) in order to move brake shoes (5) outward. Rotate the starwheel until the brake shoes contact brake drum (2). Make sure that the brake shoes stay above the radius at the bottom of the brake drum.
Rotate starwheel (4) so that the brake shoes (5) press against brake drum (3) .
Rotate the starwheel (4) for 12 clicks in order to release the pressure of the brake shoes (5) on the brake drum (3) .
Pressurize the actuator to extend the actuator rod. The pressure should be 12500 to 15000 kPa (1800 to 2200 psi). Do not exceed the maximum pressure of 25000 kPa (3600 psi).
Illustration 5 g02718919
(7) Actuator shaft (8) Locknut (9) Rod end
Illustration 6 g02718961
(A) 150 mm (6 inch) (B) 30 - 50