ROD ASSEM. 7J9844 - Caterpillar

Personal injury or death can result from escaping fluid under pressure.Escaping fluid under pressure, even a very small pin-hole size leak, can penetrate body tissue and cause serious injury and possible death. If fluid is injected into your skin, it must be treated by a doctor familiar with this type of injury.Always use a board or cardboard when checking for a leak.
With Service Brake Pressure Gauges
Move the machine to a hard, level surface.
Engage the parking brake and stop the engine.
Install the steering frame lock.
Start the engine and allow the hydraulic oil to reach normal operating temperature.
Illustration 1 g01027322
(1) Service brake pressure gauge for the front axle
(2) Service brake pressure gauge for the rear axle
Observe service brake pressure gauge (1) and service brake pressure gauge (2). Both the pressure gauges should read 0 kPa (0 psi).
With the brake accumulator charging valve operating at cut-out pressure, depress and hold down the service brake pedal. Observe the service brake pressure gauges. The correct service brake pressure is 4620 345 kPa (670 50 psi).
If the service brake oil pressure is not correct and the brake accumulator charging valve is functioning correctly, replace the service brake control valve. Without Service Brake Pressure Gauges
Table 1
Required Tools
Part Number Part Description Qty
177-7861 Hose As 1
6V-4143 Couplers 2
8T-0857 Pressure Gauge (0 to 10,000 kPa (0 to 1450 psi)) 1
6V-3965 Fitting As 2
3J-1907 O-Ring Seal 2 Note: Front service brake system pressure can be tested on the right side or the left side of the front axle. Rear service brake system pressure can be tested on the right side or the left side of the rear axle.
Move the machine to a hard, level surface.
Engage the parking brake and stop the engine.
Install the steering frame lock.
Release the braking system oil pressure. Reference: Refer to Systems Operation, Testing and Adjusting, "System