VALVE GP-PRIORITY 2817276 - Caterpillar

Table 2
Service Brake System Pressure - Test (Rear Wheels)
Date Equipment ID Code
Description Specification Actual
Rear Brakes 5690 690 kPa (825 100 psi)
Maximum Pressure 5 seconds after brakes released 140 kPa (20 psi) Introduction
This procedure will check the service brake pressure at the front and rear wheels.Required Tools
Illustration 1 g01623868
Tooling (B)
Table 3
Tool Item Part Number Description Qty
B 198-4240 Digital Pressure Indicator Gp
B1 198-4234 Digital Indicator 1
B2 251-9600 Pressure Sensor Gp (0 to 68,900 kPa (0 to 10,000 psi)) 2
B3 198-4236 Adapter Cable As 2 Machine Preparation
Warm the hydraulic oil up to 65° 5°C (149° 9°F).
Move the machine to a smooth, horizontal location. Move the machine away from other operating machines and away from personnel. Place the transmission direction control switch in the NEUTRAL position. Engage the parking brake. Lower the bowl to the ground and lower the apron onto the bowl. Stop the engine and put chocks in front of the wheels and behind the wheels.
Illustration 2 g03429120
View of the portion of the crankcase guard that has the access port.
Remove the crank case guards to allow access to the control manifold for the hydraulic fan and brake. For information regarding the removal of the crankcase guards refer to the Disassembly and Assembly, "Crankcase Guard - Remove and Install - Tractor" for your machine.
Illustration 3 g03429109
Distant up view of the pressure tap for the front service brakes.
Illustration 4 g03429112
Close up view of the pressure tap for the front service brakes.
Connect tooling (B) to (1) in order to check the front service brakes. Test Procedure for the Front Wheels
Start the engine. Warm the engine up to normal operating temperature which is 60° C (140° F). Run the engine at low idle.
Depress the service brake pedal and hold the brake pedal in the fully applied position. The brake lamps should be on.
The brake pressure for the front axle should check 5862 690 kPa (850