Figure 11C-39. Tightening Injector
Nut with Torque Wrench
Install Injector
Before installing an injector in an
engine, remove the carbon deposits from
Figure 11C-40. Installing Injector
the beveled seat of the injector tube in
Follower Stop Pin
the cylinder head. This will assure cor-
rect alignment of the injector and pre-
NOTE
vent any undue stresses from being
exerted against the spray tip.
Check the injector control rack for
free movement. Excess torque can
Use injector tube bevel reamer J 5286-9
cause the control rack to stick or
to clean the carbon from the injector
bind.
tube. Exercise care to remove ONLY the
carbon so that the proper clearance be-
tween the injector body and the cylinder
4. Move the rocker arm assembly into po-
head is maintained. Pack the flutes of
sition and secure the rocker arm bracket
the reamer with grease to retain the car-
to the cylinder head by tightening the
bon removed from the tube.
bolts to the torque specified at the end
of this subsection.
Be sure the fuel injector is filled with
fuel oil. If necessary, add clean fuel oil
NOTE
at the inlet filter cap until it runs out of
the outlet filter cap.
There is a possibility of damaging
the exhaust valves if the exhaust
Install the injector in the engine as fol-
valve bridge is not resting on the
lows:
ends of the exhaust valves when
tightening the rocker shaft brack-
1. Refer to Figure 11C-7 on page 11C-4
et bolts. Therefore, note the po-
and insert the injector into the injector
sition of the exhaust valve bridge
tube with the dowel pin in the injector
before, during and after tighten-
body registering with the locating hole in
ing the rocker shaft bolts.
the cylinder head.
2. Slide the injector rack control lever
5. Remove the shipping caps. Then in-
over so that it registers with the injector
stall the fuel pipes and connect them to
rack.
the injector and the fuel connectors.
Use socket J 8932-01 to tighten the con-
3. Install the injector clamp, special
nections to 12-15 lb-ft (16-20 Nm)
washer (with curved side toward injector
torque. Do not bend the fuel pipes and
clamp) and bolt. Tighten the bolt to
do not exceed the specified torque. Ex-
20-25 lb-ft (27-34 Nm) torque. Make
cessive tightening will twist or fracture
the flared end of the fuel line and result
sure that the clamp does not interfere
in leaks. Lubricating oil diluted by fuel
with the injector follower spring or the
oil can cause serious damage to the en-
exhaust valve springs.
gine bearings (refer to "Pressurize Fuel
System - Check for Leaks" on page
11C-49).
Fuel System and Governor