Figure 4-153. Removing or installing fuel injector nozzle and holder assembly

Remove

Note. In stubborn cases, when the nozzle is

1. Remove fuel injector nozzle and holder assembly.

Remove and discard gasket (A).

frozen, it will be necessary to remove the fuel

2 . Remove and discard fuel injector nozzle holder

inlet

connector

from

the

nozzle

and

turn

the

preformed packing (B).

nozzle using wrench socket - 5120-875-9556.

Install

When the nozzle is free of cylinder threads,

Note. Use only the dead soft copper gasket -

install mechanical puller - 5120-873-6943 in the

5310-861-1406 for replacement seal whenever

7 / 16-20 tapped hole in the end of the nozzle

the fuel injector nozzle and holder assembly has

holder. Remove nozzle and holder using puller.

been

removed

from

the

cylinder.

The

dead

soft

Figure 4-152. Loosening fuel injector nozzle

copper gasket conforms to the specific contours

and holder retainer using

of the nozzle cylinder head seat in an individual

wrench-5120-871-7198.

installation.

Because

this,

the

only

ap-

p r o v e d g a sk e t f o r t h i s f u n c t i o n a n d s h o u l d n e v e r

reused.

Before

installing

new

gasket

cylinder nozzle seat, always check to be sure that

original gasket has been removed as an inad-

vertent installation of two seating gaskets would

damage the fuel injector nozzle retaining spring.

Check to be sure cylinder nozzle seat is free from

excessive carbon deposit and that the seat face is

free

from

surface roughness. Remove carbon

or surface roughness using nozzle

deposits and /

carbon cutter - 4910-795-7958.

1. Install new preformed packing (B) on fuel injector

nozzle holder.

2. Install new gasket (A) and install fuel injector nozzle

and holder assembly.

Figure 4-153. Removing or installing fuel

injector nozzle and holder assembly.

4-74