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Page Title:
TSUM - 3-016 Beam Drive (Drive In) (99) Part 1 |
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 TM 5-5420-279-23
Launch Beam will not drive in
W ARNING
For the Launch Beam to drive in the following
prerequisite conditions must 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
MOVE IF SV10 IS M ANUALLY OPERATED AND
*
Slide Fram e extended
THE CHEST PACK RIGHT-HAND JOYSTICK IS
*
Relax Pins withdrawn & Limit Switches closed
MOVED FROM THE CENTRAL POSITION
*
Chest Pack in Beam Drive m ode
CAUSING ACTIVATION OF OTHER SOLENOID
*
RH Joystick m oved backward from centre
VALVES.
Are the
Power down &
Perform
following Mim ic
replace defective
lam p test on
Panel captions lit? - PV1b,
Mim ic Panel.
No
No
Mim ic Panel.
SV4, SV6, SV7,SV8, SV10
To replace Electrical
Are all lam ps
(see W ARNING), SV13a,
Enclosure see
lit?
SV14a, SV15b &
maintenance
SV16
procedure 5-049
Yes
Yes
Are the
Disconnect
following solenoid
Insert probes of DMM
connectors from
connector LEDs lit?-
No
into sockets 1 & 2 of
listed solenoids.
SV4, SV6, SV7, SV8, SV10
each connector
See maint procedure
(see W ARNING), SV13a,
5-141
SV14a, SV15b
NOTE
& SV16
Solenoids SV6, SV7, SV8,
SV10 & SV16 are located on
the Launch Fram e Pilot
Yes
Manifold. Solenoids SV4,
SV13a, SV14a & SV15b are
located on the Launch
Disconnect solenoid
Frame W inch Control
connectors from above
Replace solenoid
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 maint
procedure 5-124
No
Replace faulty harness,
Power down & check
Launch Fram e Enclosure or junction
harness continuity from
box as appropriate using the
listed solenoids to
Go to
following m aintenance procedures:-
Launch Frame
Part 2
Harness 5-139
Enclosure using the
Launch Fram e Enclosure 5-049
harness routing tables in
A-Fram e Junction Box 6-008
section 3.6 of Chapter 3
Slide Fram e Junct. Box 5-089
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