TM 5-3610-286-20
Table 2-5. Organizational Troubleshooting (cont).
Malfunction
Test or inspection
Corrective action
17. DELIVERY PILE BOARD WILL NOT LOWER (cont).
Step 3.
Press pile up pushbutton (b23).
If pile raises, go to step 4.
If pile does not raise, go to step 7.
NOTE
Pushbuttons must be depressed when performing step 4.
Step 4.
Using a multimeter set to ohms range, check for continuity at points 21 and 22 of
pile up pushbutton (b22) and pile down pushbutton (b23) and points 13 and 14 of
pile up pushbutton (b22) and pile down pushbutton (b23).
If continuity is present, go to step 5.
If no continuity is present, replace faulty pushbutton (para. 2-94).
NOTE
In step 5, perform continuity tests in sequence of listed components.
Step 5.
Using a multimeter set to ohms range, check for continuity between the points
listed below for the following components.
Limit switch (b37a): Across switch terminals
Relay (d121): Point A1 and Point A2, Point 43 and Point 44
Contactor (c7): Point A1 and Point A2, Point 21 and Point 22
Relay (d230): Point A1 and A2, Point 13 and Point 14
Contactor (c8): Point A1 and A2
If no continuity is present, replace faulty component (paragraphs
2-93 and 2-89).
If continuity is present, go to step 6.
Step 6.
Check wiring using schematic (figure FO-1).
Replace defective wiring.
2-47
