ICA-D212-725 (29)
Page 25 of 50
CHAPTER 29 – HYDRAULIC SYSTEM (29-00-00)
COPYRIGHT
2007 BY DART AEROSPACE LTD.
THIS DOCUMENT IS PRIVATE AND CONFIDENTIAL AND IS SUPPLIED ON THE EXPRESS CONDITION THAT IT IS NOT TO BE USED FOR ANY PURPOSE OR COPIED OR COMMUNICATED TO ANY
OTHER PERSON WITHOUT WRITTEN PERMISSION FROM DART AEROSPACE LTD.
Revision:
6
Date: 13.08.26
29.3.2.1
Removal
MATERIALS REQUIRED
NUMBER NOMENCLATURE
C-428 Caps
and/or
Plugs
NOTE
Valve and filter modules will normally be left in
place, since filters, valves, and other components
can be replaced without removing valve and filter
assembly.
29.3.2.1.1 Remove access door from front of
pylon support in cabin.
29.3.2.1.2 Disconnect electrical connectors.
29.3.2.1.3 Disconnect tubes and hoses from
valve and filter assembly (Item 13, Figure 29-2 or
Item 5, Figure 29-3).
29.3.2.1.4 Remove four bolts and four washers
securing valve and filter assembly.
29.3.2.15
Remove valve and filter assembly.
29.3.2.1.6 Cover open lines with caps and/or
plugs (C-428) to prevent contamination.
29.3.2.2
Inspection
29.3.2.2.1 Inspect housing for cracks or other
visible damage so as to be unserviceable.
29.3.2.2.2 Inspect for excessive leaks.
29.3.2.2.3 Inspect pressure switch for damage.
29.3.2.2.4 Inspect fittings for damaged threads.
29.3.2.3
Repair
29.3.2.3.1 Replace any defective fittings.
29.3.2.3.2 Replace packings at reassembly.
29.3.2.3.3 Clean filter elements (paragraph
29.3.2.5). Reset clogged filter indicator.
29.3.2.4
Installation
29.3.2.4.1 Position valve and filter assembly
(Item 13, Figure 29-2 or Item 5, Figure 29.3).
29.3.2.4.2 Secure in place using four bolts and
four washers.
29.3.2.4.3 Connect tubes and hoses to valve
and filter assembly.
29.3.2.4.4 Connect
electrical
connectors.
29.3.3
Hydraulic Filter Assemblies
The pressure and return filter assemblies are
located on the bottom of the integrated valve
and filter assembly body. Each filter assembly
contains: a filter bowl, a filter element, two
packings and a retainer. The hydraulic filter
element removes the particles from the hydraulic
fluid. These particles come from usual and
sometimes unusual, wear of hydraulic
components. Examine, clean or replace filter
element when impending bypass indicator
extends (pops), or at recommended inspection
intervals (Chapter 5).
29.3.3.1
Hydraulic Filter Assemblies (P/N
212-076-006-007) - Removal
29.3.3.1.1 Remove the forward pylon fairing
(Chapter 52).
29.3.3.1.2 Remove lockwire from filter bowl (6,
Figure 29-3) and valve body (1).
29.3.3.1.3 Remove filter bowl (6).
NOTE
If filter element is to be used again, put it in a
new clean plastic bag to prevent contamination.
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