TM 5-3805-298-23-2
0157
Table 1. Front Service Brakes Do Not Operate - Continued.
0157
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Front Service Brakes Do Not
3. Visually inspect hydraulic oil in
Air Bubbles Present in Hydraulic
Operate - Continued
sight glass for air bubbles.
Fluid Proceed to Test Step 3.
No Air Bubbles Present in Hydraulic
Fluid Proceed to step 4.
4. Check for contamination in
Hydraulic Oil Is Contaminated
Drain fluid from hydraulic tank
hydraulic oil.
(WP 0368). Replace hydraulic filter
(WP 0385). Flush hydraulic tank
(WP 0368). Fill hydraulic tank
(WP 0368).
Proceed to Test Step 6.
Hydraulic Oil OK Proceed to Test
Step 4.
Test Step 3. Inspect Hydraulic
Hoses.
1. Inspect suction hoses on hydraulic
Suction Hoses Are Not Leaking
tank for Class III leaks
Proceed to step 2.
(WP 0173). Check ground for
Suction Hoses Are Leaking
signs of leakage.
Tighten or replace suction hoses on
hydraulic tank (WP 0173).
Proceed to Test Step 6.
2. Visually inspect the supply hoses
Pump Supply Hoses Are Not
of the hydraulic cooling fan gear
Leaking Proceed to step 3.
pump for Class III leaks
Pump Supply Hoses Are Leaking
(WP 0173). Check ground for
Tighten or replace pump supply hoses
signs of leakage.
Proceed to Test Step 6.
3. Remove right lower cab access
panels (WP 0347).
Service Brake Control Hoses Are
4. Visually inspect service brake
Not Leaking Proceed to Test Step 4.
control hoses for Class III leaks
(WP 0173). Check ground for
Service Brake Control Hoses Are
signs of leakage.
Leaking Tighten or replace service
brake control hoses (WP 0173).
Proceed to Test Step 6.
Test Step 4. Test Brake Accumulator.
Perform pressure test on brake
Both Brake Accumulators at Correct
accumulators (WP 0328).
Pressure Proceed to Test Step 5.
One or Both Brake Accumulator(s)
Are Not at Correct Pressure
Replace brake accumulator(s) and
charge to correct pressure (WP 0328).
Proceed to Test Step 6.
0157-3
