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Page Title: M1084/M1086 MATERIAL HANDLING CRANE (MHC) OVERLOAD SHUTDOWN SYSTEM DOES NOT ACTIVATE
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TM 9-2320-366-20-2
TM
e114. M1084/M1086 MATERIAL HANDLING CRANE (MHC) OVERLOAD SHUTDOWN SYSTEM DOES NOT ACTIVATE
INITIAL SETUP
Equipment Conditions
Tools and Special Tools
Batteries disconnected (para 7-57).
Tool Kit, Genl Mech (Item 46, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
STE/ICE-R (Item 41, Appendix C)
References
TM 9-4910-571-12&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
REASON FOR QUESTION
shutdown system OK.
from overload lockout
Overload shutdown system
Hydraulic system shutdown
cable connector socket
will not operate if continuity
solenoid OK.
A to terminal board
is not present at overload
Hydraulic system shutdown
position 6?
lockout cable connector
relay OK.
socket A.
Crane functions OK.
POSSIBLE PROBLEMS
NO
Faulty overload lockout
cable.
Faulty overload shutdown
Replace overload lockout
box.
cable (para 7-95).
Faulty lockout solenoid
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.
connector socket B to
Hydraulic system shutdown
Overload shutdown system
solenoid OK.
terminal board position 28?
will not operate if continuity
Hydraulic system shutdown
is not present from overload
relay OK.
lockout cable connector
Crane functions OK.
socket B to terminal board
NO
position 28.
POSSIBLE PROBLEMS
Faulty overload lockout
cable.
Replace overload lockout cable
YES
Faulty overload shutdown
(para 7-95).
box.
Faulty lockout solenoid
cable.
Perform Electrical System Troubleshooting
(e116. M1084/M1086 Hoist Up Lockout Does
Not Activate, e117. M1084/M1086 Boom
Down Lockout Does Not Activate, e118. M1084/
M1086 Boom Up Lockout Does Not Activate,
and e119. M1084/M1086 Telescope Out
Lockout Does Not Activate).
2-1272

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