Lowering Bow Ramp. (cont)

TM 55-1915-200-10

e. Return control valve (16, FIGURE 2-159,

* High pressure hydraulic systems

Sheet 2 of 4) to neutral.

can cause serious personal injury in

the event of equipment failure. If

NOTE

system pressure exceeds 2000 psi,

immediately shut down system and

Crew members on main deck perform

notify unit maintenance.

following procedures.

k. Check system hydraulic gauge (15, Sheet 2

f. Install ladder (FIGURE 2-160, Sheet 2 of 2)

of 4), for reading above designed operating pressure of

on ladder brackets. (6).

2000 psi. If pressure exceeds 2000 psi, shut down

system by depressing STOP button (31, Sheet 3 of 4).

g. Climb ladder to ratchet dogs and release two

port and two starboard ratchet dogs (4, Sheet 1 of 2).

NOTE

Ramp can be lowered only from port

winch assembly control valve which

Crew members on forecastle deck

operates

both

ramp

winch

perform following procedures.

assemblies.

No control valve or

hydraulic pressure gauge exists on

h. Turn the port and starboard locking bar

starboard assembly.

wheels (1) counterclockwise to relieve port and

starboard locking bars (2, Sheet 1 of 2).

1. Lower ramp by moving control valve (16,

Sheet 2 of 4) to the left and monitor reading on

i. Remove and stow ladder (Sheet 2 of 2).

hydraulic gauge (15).

m. Continue holding control valve (16, Sheet 2

NOTE

of 4) to the left until bow ramp is lowered to the desired

position.

Station crew members at port and

starboard locking bar wheels (1,

n. Return valve (16, Sheet 2 of 4) to center

Sheet 1 of 2) and two crew members

(neutral) position to stop bow ramp travel.

on main deck just aft of bow ramp to

observe and report any damage to

o. After ramp has landed, overrun winch slightly

to eliminate tension in cable.

ramp seal and chains.

p. Reset port and starboard bow ramp winch

j. Turn handwheels (14, FIGURE 2160, Sheet 2

brakes by turning handwheels (14, Sheet 2 of 4)

of 4) counterclockwise to release port and starboard

clockwise.

handbrakes.

q. Conduct post-operation check of controls as

WARNING

prescribed in paragraph 2-5.17.2.4.

Clear all personnel and equipment

r. Depress hydraulic pump STOP button (36,

from bow ramp and from bow ramp

Sheet

4).

path of travel. Moving ramp can

cause serious injury or death.

2-457