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 TM 9-2320-364-20-1
DDR TEST
(1) Select MODE 22 (PTO RPM) on DDR
(2) Prepare crane for use
(TM 9-2320-364-10).
(3) Position CRANE MAIN POWER
switch to ON and the ENGINE
HIGH IDLE switch to LATCH. Note
reading on DDR.
(4) Does PTO RPM change smoothly
from idle to 1250 50?
(a) If PTO RPM does not change
smoothly, perform Steps (5)
through (7) below and then go to
Step 5 of this Fault.
(b) If PTO RPM does change
smoothly, perform Steps (5)
through (7) below and go to
Step 3 of this Fault.
(5) Turn OFF CRANE MAIN POWER
switch.
(6) UNLATCH HIGH IDLE switch.
(7) Turn OFF ENGINE switch.
DDR TEST
(1) Start engine (TM 9-2320-364-10).
(2) Select MODE 04 (ENGINE RPM)
on DDR (Para 2-11).
(3) Position CRANE MAIN POWER
switch to ON and the HIGH IDLE
switch to LATCH. Note reading on
DDR.
(a) If engine RPM increases, turn
OFF ENGINE switch and go to
DDEC Troubleshooting Fault D2
(b) If engine RPM fails to increase,
perform Steps (4) and (5) below
and go to Step 4 of this Fault.
(4) Turn OFF ENGINE switch.
(5) Disconnect DDR from DDL
connector MC13.
2-461
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