TM 5-2420-231-23-1
0012
Table 1. Engine Runs Rough or Is Unstable - Continued.
012
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6. Visually inspect aspirate hose
Engine Runs Rough or Is
Aspirate Hose to Air Cleaner OK -
(Figure 5, Item 1) between aspi-
Proceed to step 7.
Unstable - Continued
rate check valve (Figure 5, Item 5)
Aspirate Hose to Air Cleaner
and air cleaner (Figure 5, Item 2)
Collapsed, Damaged, or Sharply
for collapsed areas, damage, or
Bent - Reroute or replace hose
sharp bends.
(WP 0102).
Proceed to Test Step 5.
7. Visually inspect aspirate hose
Aspirate Hose to Muffler OK -
(Figure 5, Item 9) between aspi-
Proceed to step 8.
rate check valve (Figure 5, Item 5)
Aspirate Hose to Muffler Collapsed,
and muffler (Figure 5, Item 7) for
Damaged, or Sharply Bent - Reroute
collapsed areas, damage, or sharp
or replace hose (WP 0102).
bends.
Proceed to Test Step 5.
8. Remove three clamps (Figure 5,
Items 3, 6, and 8) and hoses
(Figure 5, Items 1 and 9) from
aspirate check valve (Figure 5,
Item 5).
9. Visually inspect for dirt and debris
Aspirate Hoses and Check Valve OK
- Proceed to step 10.
in aspirate hoses (Figure 5, Items
1 and 9) and aspirate check valve
Dirt and Debris in Aspirate Hoses -
(Figure 5, Item 5).
Remove dirt and debris from aspirate
hoses. Install three clamps (Figure 3,
Items 3, 6, and 8) and two hoses
(Figure 3, Items 1 and 9) on aspirate
check valve (Figure 3, Item 5)
(WP 0102).
Proceed to Test Step 5.
Dirt and Debris in Aspirate Hoses
and Aspirate Check Valve - Replace
aspirate check valve (WP 0102).
Proceed to Test Step 5.
10. Remove clamp (Figure 5, Item 4)
and aspirate check valve
(Figure 5, Item 5) from machine.
11. Visually inspect aspirate check
Aspirate Check Valve OK - Proceed to
valve (Figure 5, Item 5) for dents,
Test Step 4.
cracks, or damage.
Aspirate Check Valve Dented,
Cracked, or Damaged - Replace
aspirate check valve (WP 0102).
Proceed to Test Step 5.
0012-6