CHAPTER 4: MAINTENANCE OF MAIN ENGINE FUEL, AIR INTAKE,
TM 9-2350-256-20
AND EXHAUST SYSTEMS
4 14 REPLACE/REPAIR/SERVICE PRIMARY FUEL FILTER-Continued
1
Clean all parts with dry-cleaning solvent. Scrape off
any accumulated sludge or gum. If necessary, dry
parts.
2
Check filter (9) for blockage. Filter orifice must be
open.
3
Replace discarded and defective parts.
e. ASSEMBLY
1
Install helical compression spring (37) in filter body (7).
2
Install new preformed packing (35) on retainer
assembly (36) and place both in filter body (7).
3
Install new fuel filter element (6).
4 Install bleeder valve (1) in fuel filter head (4).
5
Install flat washer (32), new gasket (33), nut (34), and
retaining screw (31) on fuel filter head (4). Install new
fuel filter head gasket (5) in fuel filter head.
f. INSTALLATION
1
Install adapter (30) on elbow (29).
2
Install filter bracket (26) with two new lockwashers (28)
and two screws (27).
3
Install primary fuel filter (8) in filter bracket (26) with
two screws (25) and two new self-locking nuts (24).
4
Install bracket (22) with nut (23).
5
Install fuel filter inlet hose (16) with coupling (17) on
bracket (22) with screw (18), clamp (19), flat washer
(20), and nut (21).
6
Connect fuel filter outlet hose (15) and fuel filter inlet
hose (16) to primary fuel filter (8).
7
Install constant bleed line (2), filter (9), screw (10),
clamp (11), nipple (12), new lockwasher (13), and new
locknut (14).
8
Bleed air from primary fuel filter (8) and fuel lines by
loosening bleeder valve (1). Activate electric fuel
pump until fuel runs from bleeder valve. Tighten
bleeder valve.
NOTE
Follow-on maintenance:
Install left front and center front air inlet grilles (see paragraph 9-57)
4
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