TM 5-3610-286-20
Table 2-5. Organizational Troubleshooting (cont).
Malfunction
Test or inspection
Corrective action
15. DELIVERY PILE BOARD WILL NOT LOWER AUTOMATICALLY (cont).
Step 3.
Step 4.
Step 5.
Step 6.
Using a multimeter set to ohms range, check for continuity between points listed
for the following components.
Relay (d11): Point 33 and Point 34
Relay (d103): Point 43 and Point 44
Contactor (c9): Point 13 and Point 14
Relay (d107): Point 81 and Point 82
If no continuity is present, replace
(para. 2-93).
faulty relay or contactor
Using a multimeter set to ohms range, check for continuity between point 13 of
contactor (c9) and point (92a) or (93) of terminal strip.
If continuity is present, go to step 9.
If no continuity is present, replace defective limit switch (b80)
(para. 2-64).
Using a multimeter set to range higher than 115V ac, check for 115V ac at points
U5, V5, and W5 of terminal strip and ground with contactor (c7) or (c8) relay
button pressed.
If power is present, go to step 6.
If no power is present, go to step 8.
Using a multimeter set to ohms range, check for continuity between points listed
for the following relays.
Relay (d229):
Point A1 to Point A2, Point 33 to Point A34, and Point 43
to Point 44.
Relay (d230):
Point A1 to Point A2, Point 33 to Point A34, and Point 43
to Point 44.
If continuity is present, go to step 7.
If no continuity is present, replace faulty relay (d229 and/or d230).
(para. 2-93).
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