TM 5-4930-244-14
b.
Fuel Injector.
WARNING
·
Keep fuel away from open fire and keep fire extinguisher within easy reach
when working with fuel. Fuel is very flammable and can explode easily.
·
Wipe up spilled fuel immediately with rags. You can slip and fall on spilled
fuel.
(1)
Removal. (Refer to Figure 5-12).
(a)
Remove two nuts (2) from fuel injector clamp (3) and cylinder head studs (4).
(b)
Remove fuel injector (1), clamp (3), and washer (5) from cylinder head (6).
(c)
Remove cylinder head studs (4) from cylinder head (6).
(d)
Inspect parts for damage. Replace as required.
(e)
Clean threads (9) in cylinder head (6), with thread-cutting tap.
(2)
Test.
(a)
Connect fuel injector (1) to tester (7).
(b)
Test injector (1) for cracking pressure between 2864-2937 psi. If pressure is not between 2864-2937
psi, replace fuel injector (1).
(c)
Check fuel injector (1) for a four-point star spray pattern (8) Pattern (8) should have two opposing
long legs and two opposing short legs as shown. If pattern (8) does not show star pattern (8), replace
fuel injector (1).
(3)
Installation.
(a)
Apply sealing compound to thread of studs (4). Install cylinder head studs (4) into cylinder head (6).
(b)
Install new washer (5) and injector (1) In cylinder head (6).
(c)
Install clamp (3) and two nuts (2) on fuel injector (1) and studs (4).
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