TM 5-3805-298-23-2
0156
Table 1. All Service Brakes Do Not Operate - Continued.
0156
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
All Service Brakes Do Not
Test Step 2. Inspect Fluid in
Operate - Continued
Hydraulic Oil Tank.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-298-10).
2. Visually inspect sight glass, normal
Hydraulic Oil Level Is Normal
hydraulic oil level should be
Proceed to step 3.
between the top and bottom marks
Hydraulic Oil Level Is Low Add
on the sight glass
hydraulic oil as required (WP 0368).
(TM 5-3805-298-10).
Proceed to Test Step 7.
3. Visually inspect hydraulic oil in
Air Bubbles Present in Hydraulic
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
hydraulic oil.
Drain fluid from hydraulic tank
(WP 0368). Replace hydraulic filter
(WP 0385). Flush hydraulic tank
(WP 0368). Fill hydraulic tank
(WP 0368).
Proceed to Test Step 7.
Hydraulic Oil OK Proceed to Test
Step 4.
Test Step 3. Inspect Hydraulic
Hoses.
Suction Hoses Are Not Leaking
1. Inspect suction hoses on hydraulic
Proceed to step 2.
tank for Class III leaks
(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 7.
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 7.
3. Remove right side lower cab
access panels (WP 0347).
4. Visually inspect service brake
Service Brake Control Hoses Are
control hoses for Class III leaks
Not Leaking Proceed to Test Step 4.
(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 7.
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