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Figure 6. Testing Control Air Pressure at Front Air Brake Relay.
Figure 8. Parking Brake Switch Value.

Field Maintenance Manual For Military 621G Scraper -2 Page Navigation
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TM 5-3805-296-23-2
0114
Table 1. Service or Parking Brakes Do Not Release Correctly Continued.
0114
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
15. Apply sealing compound to
Service or Parking Brakes
threads of fitting (Figure 7, Item 3).
Do Not Release Correctly -
16. Install fitting (Figure 7, Item 3)
Continued
on front air brake relay
(Figure 7, Item 4).
17. Apply sealing compound to
threads of hose (Figure 7, Item 1).
18. Connect hose (Figure 7, Item 1) to
fitting (Figure 7, Item 3) and tighten
tube nut (Figure 7, Item 2).
19. Turn ignition switch and battery
Control Air Pressure Greater Than
disconnect switch to OFF position
0 psi (0 kPa) Replace brake air
(TM 5-3805-296-10).
control valve (WP 0362).
20. Perform corrective action.
Proceed to Test Step 29.
Control Air Pressure 0 psi (0 kPa)
Inspect and adjust or replace brakes as
required by brake inspection
(WP 0176).
Proceed to Test Step 29.
Figure 7. Front Air Brake Relay.
0114
0114-12


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