TM 5-2420-231-23-1
0015
Table 1. Engine Has Excessive Black or Dark Gray Smoke - Continued.
015
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
7. Visually inspect aspirate hose (Fig-
Engine Has Excessive Black
Aspirate Hose to Air Cleaner OK -
ure 2, Item 1) between aspirate
Proceed to step 8.
or Dark Gray Smoke -
check valve (Figure 2, Item 5) and
Continued
Aspirate Hose to Air Cleaner
air cleaner (Figure 2, Item 2) for
Collapsed, Damaged, or Sharply
collapsed areas, damage, or sharp
Bent - Reroute or replace hose (WP
bends.
0102).
Proceed to step 16.
8. Visually inspect aspirate hose (Fig-
Aspirate Hose to Muffler OK -
ure 2, Item 1) between aspirate
Proceed to step 9.
check valve (Figure 2, Item 5) and
Aspirate Hose to Muffler Collapsed,
muffler (Figure 2, Item 7) for col-
Damaged, or Sharply Bent - Reroute
lapsed areas, damage, or sharp
or replace hose (WP 0102).
bends.
Proceed to step 16.
9. Remove three clamps (Figure 2,
Items 3, 6, and 8) and hoses (Fig-
ure 2, Items 1 and 9) from aspirate
check valve (Figure 2, Item 5) (WP
0102).
10. Visually inspect for dirt or debris in
Aspirate Hoses and Check Valve OK
- Proceed to step 11.
aspirate hoses (Figure 2, Items 1
and 9) and aspirate check valve
Dirt or Debris in Aspirate Hoses -
(Figure 2, Item 5).
Remove dirt and debris from aspirate
hoses.
Install three clamps (Figure 2, Items 3,
6, and 8) and two hoses (Figure 2, Items
1 and 9) in aspirate check valve
(Figure 2, Item 5) (WP 0102).
Proceed to step 16.
Dirt or Debris in Aspirate Hoses and
Aspirate Check Valve - Replace
aspirate check valve (WP 0102).
Proceed to step 16.
11. Remove clamp (Figure 2, Item 4)
and aspirate check valve (Figure
2, Item 5) from machine.
Aspirate Check Valve OK - Proceed to
12. Visually inspect aspirate check
step 13.
valve (Figure 2, Item 5) for dents,
cracks, or damage.
Aspirate Check Valve Dented,
Cracked, or Damaged - Replace
aspirate check valve (WP 0102).
Proceed to step 16.
13. Install aspirate check valve (Figure
2, Item 5) and clamp (Figure 2,
Item 4) on machine.
0015-3
