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TM 9-2320-364-20-3
2-2312
6. LOSS OF MIDDLE FRAME SAFE LOWERING FUNCTION (CONT).
4.
Is continuity measured at
middle frame safe lowering
button wire connection points
with button pushed in?
Replace middle frame
safe lowering button
(Para 7-41).
Verify repair, go to
Step 10 of this Fault.
YES
NO
Middle frame operates in
manual mode.
Middle frame safe lowering
button faulty.
Wire 1479 faulty.
Wire 1478 faulty.
Rectifier faulty.
Wire 1480 faulty.
Wire 1435 faulty.
Transit valve faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If middle frame safe lowering
button is faulty, 22 to 28 vdc will
not be present at transit valve.
WARNING
5.
Are 22 to 28 vdc measured on
wire 1479 at middle frame
safe lowering button with
ENGINE switch in the ON
position?
Repair wire 1479 (see
schematic Fig 2-52)
or notify DS
Maintenance.
Verify repair, go to
Step 10 of this Fault.
YES
NO
Middle frame operates in
manual mode.
Middle frame safe lowering
button OK.
Wire 1479 faulty.
Wire 1478 faulty.
Rectifier faulty.
Wire 1480 faulty.
Wire 1435 faulty.
Transit valve faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
If wire 1479 is loose, faulty, or
shorted to ground, 22 to 28 vdc
will not be present at middle
frame safe lowering button.
WARNING
Read WARNING
on Page 2-2313
Read WARNING
on Page 2-2313
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