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Page Title:
TSUM - 3-005 Beam Drive (Drive Out) (33) Part 1 |
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 TM 5-5420-279-23
Launch Beam will not
drive out
WARNING
For the Launch Beam to drive out the following
prerequisite conditions must be met:
CRUSH INJURY. BEFORE CARRYING OUT
* Neutral gear selected
TROUBLESHOOTING INVOLVING SV10, A
* Parking brake applied
SUSPENDED OR PART BUILT BRIDGE MUST
* Tail Lift Pendant connected & powered
BE MADE SAFE EITHER BY COMPLETING 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-Frame unfolded
CRUSH INJURY. A SUSPENDED BRIDGE WILL
* A-Frame rotated
MOVE IF SV10 IS MANUALLY OPERATED AND
* Slide Frame extended
THE CHEST PACK RIGHT-HAND JOYSTICK IS
* Relax Pins withdrawn & Limit Switches closed
MOVED FROM THE CENTRAL POSITION
* Chest Pack in Beam Drive mode
CAUSING ACTIVATION OF OTHER SOLENOID
* RH Joystick moved forward from centre
VALVES.
Are the
Perform
Power down & replace
following Mimic
lamp test on
defective Launch
Panel captions lit? - PV1a,
No
No
Mimic Panel.
Frame Enclosure. See
SV4, SV6, SV7,SV8, SV10
Are all lamps
maintenance procedure
(see WARNING), SV13a,
lit?
5-049
SV14a, SV15a &
SV16
Yes
Yes
Are the
following solenoid
Disconnect connectors
Insert probes of
connector LEDs lit?-
No
from listed solenoids.
DMM into sockets
SV4, SV6, SV7, SV8, SV10
See maint procedure
1 & 2 of each
(see WARNING), SV13a,
5-141
connector
SV14a, SV15a
NOTE
& SV16
Solenoids SV6, SV7, SV8,
SV10 & SV16 are located on
Yes
the Launch Frame Pilot
Manifold. Solenoids SV4,
SV13a, SV14a & SV15a are
located on the Launch
Frame Winch Control
Disconnect solenoid
Manifold
connectors from above
Replace solenoid
Is 24V
listed solenoids. See maint
Yes
harness if connector
solenoid supply
procedure 5-141. Connect
LED not lit. See maint
present?
DMM across solenoid coil
procedure 5-139
pins. See resistance check
in maint procedure 5-124
No
Replace faulty harness,
Power down & check
Launch Frame Enclosure or junction
box as appropriate using the following
harness continuity from
Go to
listed solenoids to Launch
maintenance procedures:-
Part 2
Frame Enclosure using the
Harness 5-139
cable routing tables in
Launch Frame Enclosure 5-049
Section 3.6 of Chapter 3
A-Frame Junction Box 6-008
Slide Frame Junction Box 5-089
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