TM-9-2815-205-34

ENGINE WITH CONTAINER; MODELS 5063-5299, 5063-5392, 5063-5393, 5063-5395, 5063-5398, 5063-539F, 5063-539L

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

AUGUST 1992

TM-9-2815-205-34 - Page 454 of 596

TM 9-2815-205-34

3-65. FUEL INJECTOR ASSEMBLY REPAIR (Cont)

(e)

(f)

(g)

(h)

Place spring cage (14) over spring

seat (15) and spring (16).

Insert needle valve (13) into spray tip

(2) with tapered end down. Place

assembly on spring cage (14) with

quill end of needle valve in hole in

spring cage.

Lubricate threads on injector nut (1)

with engine oil and carefully thread

nut on pedestal (43). Tighten nut as

tight as possible by hand.

Using injector wrench (11), torque

injector nut (1) to 75-85 Ib-ft (102-115

N-m) for blued components, 45-55

Ib-ft (61-75 N-m) for steel gray

components, or 60-70 Ib-ft (81-95

N-m) for mixed components.

WARNING

Do not operate diesel fuel

injector nozzle tester without

shield.

Fuel spray can

penetrate skin.

entering blood stream may

cause serious infection.

(i) Place shield (40) on diesel fuel

injector nozzle tester (41). Operate

pump handle (39) with smooth even

strokes and record fuel injector needle

valve opening pressure (pop

pressure). Needle valve opens when

fuel sprays from tip. Pop needle valve

several times to purge air from

system. Record test gage (44)

opening pressure. Final needle valve

opening pressure must be 2600-3200

PSI for new injector and 2300-3300

PSI for used injector.

(j) Remove injector nut (1), spray tip (2),

needle valve (13), spring

(16), spring

seat (15), spring cage (14), check

valve cage (17), and check valve (18)

from mounting pedestal (43).

NOT E

After needle valve opening

pressure test is compIete,

continue injector assembly.

3-326

Fuel oil