TM 55-1520-240-23-6
7-3
REMOVE HYDRAULIC SYSTEM PLUMBING (GENERAL INFORMATION)
7-3
INITIAL SETUP
Applicable Configurations:
All
Tools:
Hydraulic Repairer’s Tool Kit, NSN 5180-00-323-4891
Containers
Materials:
Cloths (E120)
Tags (E264)
Parts:
Caps
Plugs
Personnel Required:
Aircraft Pneudraulics Repairer
References:
TM 1-1500-204-23
Task 1-64
Task 1-65
Equipment Condition:
Battery Disconnected (Task 1-39)
Electrical Power Off
Hydraulic Power Off
Access Panels and Work Platforms Open As
Required (Task 2-2)
General Safety Instructions:
As Required
NOTE
When removing fittings, hoses, or
tubes, use following information as a
guide.
Deplete hydraulic pressure in system
before disconnecting any fitting.
Hydraulic fluid ejected under pressure
can cause injury to personnel.
Hydraulic fluid spray is a fire hazard.
1.
If removing item from flight control system,
deplete pressure by cycling cockpit control stick
(Task 1-64).
2.
If removing item from utility system, deplete
pressure by pressing APU start module
depressurization valve (Task 1-65).
2.1.
Cover the dash actuators if work is to be
performed in the flight control closet. Hydraulic
fluid can enter actuator motor, making it
inoperative.
REMOVAL OF FITTINGS
3.
Note position and location of all fittings to be
removed.
4.
Place containers and cloths (E120) to catch and
absorb fluid that drains during removal.
5.
Remove fittings as required. Install plugs in
ports. Install caps in open ends of lines.
6.
Replace all packings and seals on fittings to be
used again.
REMOVAL OF HOSES
7.
Identify ends of lines, hoses, or tubes before
disconnecting.
8.
Place containers and cloths (E120) to catch and
absorb fluid that drains during removal.
9.
Hold hose fittings with wrench. Disconnect hoses
as required. Install plugs or caps as required on
open connections of components or lines.
10.
Remove all clamps and tag hose to indicate exact
location. Use paper tags (E264). Remove hose.
7-16
