TM 55-1520-240-T
7-4.3 SWIVEL LOCKS SYSTEM VISUAL CHECK (Continued)
7-4.3
TASK
RESULT
1.
2.
3.
4.
5.
6.
7.
8.
Lift switch guard (1). Check BRAKE
STEER switch (2).
Close switch guard (1).
Check power steering and swivel lock
module (3).
Check swivel lock control valve (4).
Check wheel brake control valve (5).
Check swivel lock actuator (6) on right,
landing gear (7).
Repeat step 6. for actuator (6) on left
landing gear (10).
Check power steering module accumula-
tor gage (11) for pressure indication.
If switch guard (1) or switch (2) is loose or dam-
aged, tighten or replace it as required.
If module (3) is loose or damaged, tighten or replace
it as required. If tubing to module is loose or dam-
aged, tighten or replace it as required.
If valve (4) is loose or damaged, tighten or replace it
as required. If wiring or electrical connector to valve
is damaged, repair or replace it as required.
If valve (5) is loose or damaged, tighten or replace it
as required. If wiring or electrical connector to valve
is damaged, repair or replace it as required.
If actuator (6) is loose or damaged, tighten or re-
place it as required. If hydraulic hose or tube to actu-
ator is loose or damaged, tighten or replace it as
required. If swivel lock actuator rod (8) is extended
between swivel lock pins (9), landing gear-locked,
replace actuator (6).
Accumulator gage (11) should indicate 3,000 psi or
utility hydraulic system pressure as indicated on
maintenance panel. If pressure is not correct, check
accumulator precharge; service if necessary and
pressurize to 3,000 psi. If power steering module
does not maintain pressure, go to task 7-5.9.
FOLLOW-ON MAINTENANCE:
None
END OF TASK
Change 4
7-143
