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Page Title:
TSUM - 3-010 Carriage Drive Failure (High Bank Drive Out) (55) Part 1 |
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 TM 5-5420-279-23
Carriage will not drive out
(High Bank)
W ARNING
For the Carriage to drive out (High Bank) the following
prerequisite conditions m ust be m et:
CRUSH INJURY. BEFORE CARRYING OUT
* Neutral gear selected
TROUBLESHOOTING INVOLVING SV10, A
* Parking brake applied
SUSPENDED OR PART BUILT BRIDGE M UST
* Tail Lift Pendant connected & powered
BE M ADE SAFE EITHER BY COM PLETING THE
* Chest Pack connected & powered
BUILD OPERATIONS IN BACK-UP MODE OR
* 4 Position Switch at position 4
BY RETRIEVING THE BRIDGE.
* Ensure E-STOP RESET satisfactory
* A-Fram e unfolded
CRUSH INJURY. A SUSPENDED BRIDGE W ILL
* A-Fram e rotated
M OVE IF SV10 IS M ANUALLY OPERATED AND
* Slide Fram e extended
THE CHEST PACK RIGHT-HAND JOYSTICK IS
* Relax Pins withdrawn & Lim it Switches closed
M OVED FROM THE CENTRAL POSITION
* Chest Pack in Carriage Drive High Bank m ode
CAUSING ACTIVATION OF OTHER SOLENOID
* RH Joystick m oved forward from centre
VALVES.
Are the
Power down &
following Mim ic
Perform
replace defective
lam p test on
Panel captions lit?-PV1a,
Mim ic Panel.
No
No
SV5, SV6, SV8, SV10 (see
Mim ic Panel.
To replace Electrical
Are all lam ps
W ARNING), SV13b,
Enclosure see
SV14b &
lit?
m aintenance
SV15a
procedure 5-049
Yes
Yes
Are
the following
Disconnect connectors
solenoid connector LEDs
Insert probes of DMM
No
from listed solenoids.
lit?- SV5, SV6, SV8, SV10
into sockets 1 & 2 of
See m aint procedure
(see W ARNING), SV13b,
each connector
5-141
SV14b &
NOTE
SV15a
Solenoids SV5, SV6, SV8 &
SV10 are located on the
Yes
Launch Frame Pilot
Manifold. Solenoids SV13b,
SV14b & SV15a are located
on the Launch Fram e W inch
Disconnect solenoid
Control Manifold
connectors from above
Replace solenoid
listed solenoids. See
harness if connector
Is 24V
Yes
m aint procedure 5-141.
LED not lit. See
solenoid supply
Connect DMM across
m aintenance
present?
solenoid coil pins.See
procedure 5-139
resistance check in m aint
procedure 5-124
No
Replace faulty harness or
Power down & check
Launch Frame Enclosure as
harness continuity from
appropriate using the following
listed solenoids to Launch
Go to
m aintenance procedures:-
Fram e Enclosure using the
Part 2
Harness 5-139
cable routing tables in
Launch Fram e Enclosure
section 3.6 of Chapter 3
5-049
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