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CHAPTER 2. DSB HYDRAULIC TROUBLE SHOOTING
Up
TM-5-5420-279-23 Dry Support Bridge (DSB) (NSN
Next
TROUBLESHOOTING FLOW CHARTS - TM-5-5420-279-230066
TM 5-5420-279-23
(7)
Stabilizer Manifold Assembly - Located on the A-Frame. Solenoid valves housed in
the Stabilizer Manifold Assembly when activated allow hydraulic fluid to operate the A-Frame
Folding Cylinders and the A-Frame Stabilizer Cylinders.
(8)
Roller Brakes and Back-up Mode Operation - The Roller Brakes and Back-up Mode
Operation control are mounted on the A-Frame Assembly. A constant hydraulic oil pressure
is felt at the Roller Brakes. The Back-up Mode Operation controls are mounted on the A-
Frame allows the A-Frame hydraulics to be operated in the event of remote control failure.
(9)
Launch Frame Pilot Manifold Assembly - Located on the right hand side of the
Launch Frame. A series of solenoid valves, when activated, allow hydraulic pressure to
assist in the operation of the Articulator Cylinders. Hydraulic pressure is also delivered to
the Pinch Roll/Stowing Manifold Assembly.
(10) Pinch Roll/Stowing Manifold Assembly - Located on the right hand side of the
Launch Frame. The Pinch Roll/Stowing Manifold Assembly allows hydraulic pressure
through solenoid valves to operate the Stowing Cylinders.
(11) Launch Frame Articulator Manifold And Synchronization Manifold - Located on the
left-hand side of the Launch Frame. Solenoid valves, when activated, allow the Articulator
Cylinders and the A-Frame Rotate Cylinders to be operated. Hydraulic pressure is also
delivered to the Launch Frame Winch Control.
(12) Launch Frame Winch Control Manifold - Located on the left-hand side of the Launch
Frame. The Launch Frame Winch Control Manifold houses a series of solenoid valves
which, when activated, allow the Upper and Lower winches to be operated. Hydraulic
pressure is also delivered to the Beam Drive Structure to allow operation of the Beam Drive
Motors.
LAUNCHER HYDRAULIC SCHEMATIC DRAWINGS
a. The hydraulic circuits are made up of four major service lines:
P-
Pressure
Hydraulic fluid at either working or a nominated pressure
T-
Tank
Hydraulic fluid fed back to the tank under pressure
D-
Drain
Hydraulic fluid returned to the Tank or a drain point
LS -
Load Sensing
Hydraulic fluid signals the hydraulic pump to either increase or
decrease pump pressure out put during operation of the launcher
LAUNCHER ELECTRICAL SYSTEM OVERVIEW
a. General Description - An electrical system provides power to switches and solenoids which,
when activated, allow the operator to control the function of the launcher components.
b. Electrical power is supplied from the host vehicle. Harnesses connect junction boxes,
switches and solenoids in the electrical system. Junction boxes redirect electrical supplies to
specific sub-systems.
c.  Limit switches and indicators are fitted in the circuit to provide a signal, a visual indication at
the control panel, of the state of a component.
d. Solenoid valves, when activated electrically, will allow or stop the flow of hydraulic fluid in the
hydraulic circuits.

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