TM 5-2420-231-23-1
0063
Table 1. Brakes Do Not Hold Machine.
0063
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Brakes Do Not Hold Machine Test Step 1. Check Operation of
Parking Brake.
1. Apply parking brake lever (Figure
1, Item 2) (TM 5-2420-231-10).
2. Apply and hold brake pedals (Fig-
ure 1, Items 3 and 5) (TM 5-2420-
231-10).
3. Start engine and place powershift
lever (Figure 1, Item 1) in F posi-
tion (TM 5-2420-231-10).
4. Slowly release brake pedals (Fig-
Parking Brake Keeps Machine From
ure 1, Items 3 and 5) (TM 5-2420-
Moving - Proceed to Test Step 2.
231-10). Parking brake should
Parking Brake Does Not Keep
keep machine from moving.
Machine From Moving - Check
parking brake cable adjustment (WP
0228).
If adjustment is OK, replace rear drive
axle housing (WP 0219).
Proceed to Test Step 4.
Test Step 2. Check Operation of Left
Master Cylinder.
1. Disengage brake pedal lock lever
(Figure 1, Item 4) (TM 5-2420-231-
10).
2. Apply left brake pedal (Figure 1,
Item 5) and place powershift lever
(Figure 1, Item 1) in the F position
(TM 5-2420-231-10).
3. Slowly release parking brake lever
Left Brake Pedal Keeps Machine
(Figure 1, Item 2) (TM 5-2420-231-
From Moving - Proceed to Test Step 3.
10). Left brake pedal should keep
Apply parking brake lever and place
machine from moving.
powershift lever in N position (TM 5-
2420-5231-10).
Left Brake Pedal Does Not Keep
Machine From Moving - Engage brake
pedal lock lever (Figure 1, Item 4) (TM
5-2420-231-10).
Replace left brake master cylinder (WP
0224).
Proceed to step 4.
4. Apply left brake pedal (Figure 1,
Item 5) and place powershift lever
(Figure 1, Item 1) in the F position
(TM 5-2420-231-10).