DETROIT DIESEL 53
F u e l Injector 2.1.1
Provide the injector repair room with a supply of
the inlet side only. No filter is required on the
filtered, moisture-proof compressed air for drying the
outlet side (Fig. 34).
injector parts after they have been cleaned. Use wash
pans of rust-proof material and deep enough to permit
3. Whenever an injector has been removed and
all of the injector parts to be completely covered by
reinstalled or replaced in an engine, make the
the cleaning agent, usually clean fuel oil, when
following adjustments as outlined in Section 14:
submerged in wire baskets of 16 mesh wire screen. Use
baskets which will support the parts so as to avoid
a. Time the injector.
contact with the dirt which settles at the bottom of the
b. Position the injector control rack.
Rags should never be used for cleaning injector parts
4. Whenever an engine is to be out of service for an
since lint or other particles will clog parts of the
extended period, purge the fuel system, then fill it with
injector when it is assembled. A lint-free cleaning
a good grade of rust preventive (refer IO Section 15.3).
tissue is a good, inexpensive material for wiping
5. When a reconditioned injector is to be placed in
stock, fill it with injector test oil J 8130. Do not use fuel
When servicing an injector, follow the general
o i l . Install shipping caps on both filter caps
immediately after filling. Store the injector in an
instructions outlined below:
upright position to prevent test oil leakage.
1. Whenever the fuel pipes are removed from an
NOTE: Make sure that new filters have been
injector, cover the filter caps with shipping caps to
keep dirt out of the injectors. Also protect the fuel
installed in a reconditioned injector which is to
be placed in stock. This precaution will prevent
pipes and fuel connectors from the entry of dirt or
dirt particles from entering the injector due to a
other foreign material.
possible reversal of fuel flow when installing
2. After an injector has been operated in an engine, do
the injector in an engine other than the original
not remove the filter caps or filters while the injector is
in the engine. Replace the filters only at the time of
complete disassembly and assembly of an injector.
NOTE: In the offset injector, a filter is used in
1. Clean and remove the valve rocker cover.
2. Remove the fuel pipes from both the injector and
the fuel connectors (Fig. 6).
NOTE: Immediately after removal of the fuel
pipes from an injector. cover the filter caps with
shipping caps to prevent dirt from entering the
injector. Also protect the fuel pipes and fuel
Fig. 10. Spray Pattern Test
Fig. 11. Removing Injector Follower Stop Pin
SEC. 2.1.1 Page 5