TB-9-3950-253-13-P
PALLETIZED LOAD SYSTEM TRUCK, M1075 and M1075A1 (PLS) AND HEAVY EXPANDED MOBILITY TACTICAL TRUCK, M1120, M1120A2, AND M1120A4 (HEMTT), ENHANCED CONTAINER HANDLING UNIT (E-CHU)
TECHNICAL BULLETIN; OPERATOR AND FIELD MAINTENANCE, INSTALLATION INSTRUCTIONS, AND REPAIR PARTS AND SPECIAL TOOLS LIST
JULY 2009
TB-9-3950-253-13-P - Page 216 of 704
TB 9-3950-253-13&P
Change 1
0019-36
0019
END OF WORK PACKAGE
C2
Twistlock Sensor
Conflict
All Four Signals
From The Twist-
lock Sensors
Are Not Identical
Rear Sliders &
Stowage
Lock or unlock
and stow all
twistlocks
Refer to
No Hook
Lift Function
Mal-
function
C3
Mode Switch
Conflict
Signals Present
From Both Auto
And Manual
Modes On The
Stowage Con-
trols
Stowage Box
Check Switch -
Replace If Nec-
essary
Refer to
No Stow-
age Function
Mal-
function
C4
Vehicle Mode
Switch Conflict
(HEMTT Only)
Vehicle Mode
Switch Not In
Correct position
for calibration
Vehicle Dash
Set Vehicle
Mode Switch to
AUTO Position
Refer to
Unable to
Calibrate (HEMTT
Only)
DIAGNOSES
D0
Middle Frame
Not Down
The Middle
Frame Is Not
Fully Down
Before Select-
ing A Stowage
Mode
Hooklift
Lower The Mid-
dle Frame Fully
Down Using
Hooklift Controls
Refer to
No Stow-
age Mode
Malfunc-
tion
D1
Hook Arm Up
The Hook Arm
Has Reached
The 77 in.or
Fully Back Sen-
sor During Stow-
age Operation
Hooklift
Lower The Hook
To Its Fully
Down Position
Using Hooklift
Controls
Refer to
No Stow-
age Mode
Malfunc-
tion
D2
Twist Locks Not
Open
The Hooklift Will
Not Unload Due
To One Or More
Of The Twist-
locks Being
Locked
Rear Sliders &
Stowage
Undo & Stow All
Twistlocks
Refer to
No Hooklift
Functions
Malfunc-
tion
Table 2. Enhanced Container Handling Unit (E-CHU) - Continued.
ERROR
CODE
DESCRIPTION
COMMENTS/
PROBLEM
LOCATION
POSSIBLE
ACTION
TROUBLESHOO-
TING REFERENCE
Back to Top
