SkyTrak 6036 Service Manual - Manual (Page 200)

Engine: Cummins 4BT3.9
7.22 Model 6036 Legacy
1. Use a 16-mm wrench to prevent the injector body
(Fig. 7-23, 1) from turning. Loosen the hold-down
nut (2) with a 24 mm box wrench.
Figure 7- 23 Fuel Injector
2. Clean the injector nozzle bore.
3. Remove the injector hold-down nut from the injector
body.
4. Apply a light coat of anti-seize compound to the new
injector surface. Avoid getting anti-seize compound
into the fuel drain hole.
5. Install the hold-down nut on the injector body.
6. Install a new o-ring into the recessed groove in the
top of the hold-down nut. Make sure the o-ring is not
cut or twisted during installation.
7. Apply a light coat of anti-seize compound to the
threads of the injector hold-down nut.
8. Assemble the injector and new copper washer
(Fig. 7-23, 3). Use only ONE copper washer. A light
coat of clean 15W40 engine oil placed between the
washer and the injector will help keep the washer
from falling during installation.
9. Install the injector with the protrusion (Fig. 7-23, 4)
on the side of the nozzle fitting into the notch (5) in
the head.
10. Tighten the hold-down nut (Fig. 7-23, 2), and torque
to 44 lb/ft (60 Nm).
11. Install the fuel drain manifold (Fig. 7-24, 2), and torque
to 6 lb/ft (8 Nm).
Figure 7-24 Fuel Injector Fuel Line and Drain Manifold
12. Install the high-pressure fuel lines (Fig. 7-24, 1), and
torque to 18 lb/ft (24 Nm).
13. Run the engine, and check for fuel and air leakage.
14. Bleed the fuel system in accordance with the
instructions found in the appropriate owners/
operators manual.
7.8.8 After Fuel System Service
1. Drain and flush the fuel tank if it was contaminated.
2. Vent air from the fuel system in accordance with the
instructions found in the appropriate owners/
operators manual.
3. Fill the fuel tank with fresh, clean diesel fuel as required.
MA1960
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MT3160