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Table 1. Engine Will Not Crank.
Figure 1. Battery Disconnect Switch and Negative Cables.

Field Maintenance Manual For Military 621G Scraper -2 Page Navigation
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TM 5-3805-296-23-2
0104
Table 1. Engine Will Not Crank Continued.
0104
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Engine WIll Not Crank
Test Step 4. Perform Battery Test.
Continued
1. Test batteries (WP 0170).
All Batteries Pass Test Proceed to
step 2.
Cable(s) Corroded or Damaged
Clean or replace as directed.
Proceed to Test Step 27.
Battery Terminal(s) Corroded or
Damaged Clean or replace as
directed.
Proceed to Test Step 27.
One or More Batteries Fail Test
Recharge or replace batteries as
directed.
Proceed to Test Step 27.
2. Position boot aside
(Figure 1, Item 3).
3. Inspect battery negative cables
Cables OK Proceed to step 4.
(Figure 1, Item 1 and 2) and
Cables Damaged Replace damaged
retaining hardware
cable(s) (WP 0307).
(Figure 1, Item 4) for damage, and
Proceed to Test Step 27.
loose and corroded connections
Cable Connection(s) Corroded
IAW (WP 0540).
Clean IAW (WP 0540) and connect
cable(s) (WP 0307).
Proceed to Test Step 27.
Cable Connection(s) Loose Tighten
cable connection(s).
Proceed to Test Step 27.
4. Inspect battery disconnect switch
Switch OK Proceed to step 5.
(Figure 1, Item 5) for damage.
Switch Damaged Replace battery
disconnect switch (WP 0312).
Proceed to Test Step 27.
0104-3


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