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Page Title:
M1089 MATERIAL HANDLING CRANE (MHC) OVERLOAD SHUTDOWN SYSTEM DOES NOT ACTIVATE |
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 TM 9-2320-366-20-2
TM
INITIAL SETUP
Tools and Special Tools
Equipment Conditions
Tool Kit, Genl Mech (Item 46, Appendix C)
Batteries disconnected (para 7-57).
Multimeter, Digital (Item 22, Appendix C)
STE/ICE-R (Item 41, Appendix C)
References
TM 9-4910-471-12&P
START
KNOWN INFO
TEST OPTIONS
1.
Battery voltage OK.
Continuity Test or
Input voltage to overload
STE/ICE-R Test #91
Is continuity present
shutdown system OK.
from overload lockout
REASON FOR QUESTION
Hydraulic system shutdown
cable connector socket
Overload shutdown system
solenoid OK.
A to terminal board
will not operate if continuity
Hydraulic system shutdown
position 1?
is not present at overload
relay OK.
lockout cable connector
Crane functions OK.
socket A.
POSSIBLE PROBLEMS
Faulty overload lockout
NO
cable.
Faulty overload shutdown
box.
Replace overload lockout
Faulty lockout solenoid
cable (para 7-116).
YES
cable.
KNOWN INFO
TEST OPTIONS
2.
Battery voltage OK.
Continuity Test or
Is continuity present from
Input voltage to overload
STE/ICE-R Test #91
overload lockout cable
REASON FOR QUESTION
shutdown system OK.
Overload shutdown system
connector socket B to
Hydraulic system shutdown
will not operate if continuity
terminal board position 28?
solenoid OK.
is not present from overload
Hydraulic system shutdown
lockout cable connector
relay OK.
socket B to terminal board
Crane functions OK.
NO
position 19.
POSSIBLE PROBLEMS
Faulty overload lockout
cable.
Replace overload lockout
YES
Faulty overload shutdown
cable (para 7-116).
box.
Faulty lockout solenoid
cable.
Perform Electrical System Troubleshooting
(e130. M1089 Hoist Up Lockout Does
Not Activate, e131. M1089 Boom
Down Lockout Does Not Activate, e132. M1089
Boom Up Lockout Does Not Activate,
and e133. M1089 Telescope Out
Lockout Does Not Activate).
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