HOSE AS-WATER 3728108 - Caterpillar

Table 1
Tools Needed Qty
8S-2263 Spring Tester 1
5P-1404 O-Ring Adapter
(7/8-14 male X 9/16-18 female) 2
6V-3965 Fitting Assembly 2
6V-7830 Pressure Gauge (MULTIPLE GAUGE) 6
Personal injury or death can result from sudden machine movement.Sudden movement of the machine or release of air pressure or oil pressure can cause injury to persons on or near the machine.To help prevent possible injury before testing and adjusting any air system or hydraulic system, perform the procedure in the Testing and Adjusting, "General Information" section.
When a slack adjuster strokes correctly, there is always a small amount of pressure on the piston in the service brakes after the brakes are released.The following test covers the following pressures:
Pressure of the service brakes at the slack adjusters
Pressure of the service brakes at the wheels
Residual pressure for the service brakes at the wheelsUse the following procedure in order to check for a failure in a slack adjuster.
Illustration 1 g01951707
(1) Pressure tap for the front slack adjuster
Connect a 6V-7830 Pressure Gauge (MULTIPLE GAUGE) to pressure tap (1) of the front slack adjuster.
Illustration 2 g01951711
(2) Pressure tap for the rear slack adjuster
Connect a 6V-7830 Pressure Gauge (MULTIPLE GAUGE) to pressure tap (2) of the rear slack adjuster.
Illustration 3 g01951715
Rear axle housing
(3) Pressure taps for the rear service brakes
Connect a 6V-7830 Pressure Gauge (MULTIPLE GAUGE) to pressure tap (3).
Repeat Step 3 for the other pressure tap (3) for the rear service brakes.
Illustration 4 g02019554
Typical view of the front wheel
(4) Pressure tap for the front service brakes
Connect a 6V-7830 Pressure Gauge (MULTIPLE GAUGE) to the pressure tap (4).
Repeat Step 5 for the other front wheel.
Start the engine. Operate the engine at LOW idle.
Move the transmission control to the NEUTRAL position. Note: Allow enough time to pass in order to make sure that the service brake accumulator is fully charged.
Depress the service brake pedal in order to engage the brake. Note: Check the pressure gauges. The pressure gauges at all four pressure taps (1), (2), (3), and (4) should register the same readings.
Release the brakes. Note: Check the pressure gauges. The pressure gauges that are connected to pressure taps (3) and (4) near the purge valves on the wheels should show a residual pressure when the service brakes are released.
The pressures from all four pressure taps (1), (2), (3), and (4) should be the same value.
The approximate oil pressure at the rear wheels should be 25 to 150 kPa (3.6 to 21.7 psi).
The approximate oil pressure at the front wheels should be 25 to 150 kPa (3.6 to 21.7 psi).Note: Low residual pressure indicates a failed slack adjuster. High residual pressure may indicate a failed slack adjuster or warped brake discs. Rotate the wheel and check for pressure fluctuations in order to determine if the brake discs are warped. The brake discs are probably warped if the pressure fluctuates. If the brake discs are warped, the brake discs should be replaced.
If a problem is indicated, remove the slack adjuster. See the procedure in "Check of Small Piston Movement" for additional information. Check of Small