 |
|||
|
|
|||
|
|
|||
| ||||||||||
|
|
 TM 55-1520-238-S
NOTE
CAUTION
If landing gear collars do not rotate, coun-
terclockwise, easily, the landing gear strut
has not been fully extended. Fully extend
To prevent damage to equipment
strut (step b) before proceeding.
from excessive stress on helicopter
landing gear and cargo aircraft
(1) Remove aircraft left strut collar locking
winch, do not apply helicopter
pin, rotate collar counterclockwise to
brakes during kneeling or erecting
unlock, reinstall locking pin.
operations.
(2) Remove aircraft right strut collar lock-
To prevent damage to equipment,
ing pin, rotate collar counterclockwise
maintain adequate overhead and
to unlock, reinstall locking pin.
underbelly clearance during kneel-
e. Position Helicopter at Desired Height.
ing and erecting operations.
(1) Slowly kneel helicopter by moving
a. Position Personnel.
LEFT and RIGHT switches on control
(1) Position one person to operate left shut
pendant to DOWN position.
off valve.
(2) Slowly erect helicopter by moving
(2) Position one person to operate right
LEFT and RIGHT switches on control
shut off valve.
pendant to UP position.
(3) Position one person to move hydraulic
f. Disconnect Hydraulic Cart (Kneeled
cart, as required.
Condition).
(4) Position one person to operate hydrau-
lic cart.
WARNING
(5) Position personnel to monitor over-
head and underbelly clearances.
To prevent injury and equipment dam-
b. Extend Struts.
age from strut collapse and helicopter
NOTE
rollover, ensure that there is no strut
movement after closing shutoff valves.
Landing gear struts are extended sepa-
Strut movement indicates a leaking
rately to insure that hydraulic hoses are
shutoff valve that must be replaced
correctly connected.
prior to shipment.
(1) Connect and check out cart (para 84).
(2) Insure both shutoff valves are open.
CAUTION
(3) Press start switch on control pendant.
(4) Move LEFT switch on control pendant
to UP position. Insure that landing gear
To prevent damage to strut kneeling
on operators left is fully extended to its
nipple, shutoff valve hoses must re-
stop, release LEFT switch.
main attached to the helicopter when it
is in the kneeled positioned.
(5) Move RIGHT switch on control pendant
to UP position. Insure that landing gear
(1) Close left and right shutoff hose valves.
on operators right is fully extended to its
(2) Move LEFT and RIGHT switches on
stop, release RIGHT switch.
control pendant to DOWN position to
c. Inspect for Hydraulic Leaks.
bleed pressure from kneeling hoses.
(3) Disconnect left and right 40 foot kneel-
WARNING
ing hoses from hydraulic cart and shut-
off valve. Install dust caps on both 40
To prevent injury and equipment dam-
foot kneeling hoses.
age from strut collapse and helicopter
(4) Press STOP button on control pendant.
rollover, do not proceed until all leaks
(5) Disconnect electrical power supply and
are repaired.
ground wire from power source and he-
(1) Inspect landing gear, hoses, fittings,
licopter.
valves and hydraulic cart for leaks.
(6) Position cart for kneeling next helicop-
(2) Repair leaks as required.
ter or prepare for transport, as ap-
d. Unlock Strut Collars.
propriate.
Change 1
85
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals