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Page Title:
TSUM - 3-009 Carriage Drive Failure (Level Bank Drive Out) (55) Part 1 |
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 TM 5-5420-279-23
Carriage will not drive out
(Level Bank)
W ARNING
For the Carriage to drive out (Level 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 M ODE 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* Relax Pins withdrawn & Lim it Switches closed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 Level Bank m ode
CAUSING ACTIVATION OF OTHER SOLENOID
* RH Joystick m oved forward from centre
VALVES.
Power down &
Are the
Perform
replace defective
following Mim ic
lam p test on
Mim ic Panel.
No
No
Panel captions lit?-PV1a,
Mim ic Panel.
To replace
SV5, SV6, SV8, SV10 (see
Are all lam ps
Electrical Enclosure
W ARNING), SV13b &
lit?
see m aintenance
SV14b
procedure 5-049
Yes
Yes
Are the
Disconnect
following solenoid
Insert probes of
connectors from
No
connector LEDs lit?- SV5,
DMM into sockets
listed solenoids.
SV6, SV8, SV10 (see
1 & 2 of each
See m aint procedure
W ARNING), SV13b
connector
5-141
& SV14b
NOTE
Solenoids SV5, SV6, SV8 &
SV10 are located on the
Yes
Launch Fram e Pilot
Manifold. Solenoids SV13b
& SV14b are located on the
Disconnect solenoid
Launch Fram e W inch
connectors from above
Replace solenoid
Control Manifold
listed solenoids. See
Is 24V
harness if connector
Yes
m aint procedure 5-141.
solenoid supply
LED not lit. See
Connect DMM across
present?
m aintenance
solenoid coil pins.See
procedure 5-139
resistance check in m aint
procedure 5-124
No
Power down & check
Replace faulty harness
harness continuity from
or Launch Fram e Enclosure as
listed solenoids to
Go to
appropriate using the following
Launch Fram e Enclosure
Part 2
m aintenance procedures:-
using the cable routing
Harness 5-139
tables in section 3.6 of
Launch Fram e Enclosure 5-049
Chapter 3
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