Service Manual

ISB, ISBe and QSB (Common Rail [...] Injector
Section 6 - Injectors and Fuel Lines - Group 06 Page 6-77
To buy Cummins Parts and Service Manuals, Training Guides, or Tools go to our website at https://store.cummins.com
Remove
Disconnect the solenoid wires.
Remove the two injector hold-down capscrews and
remove the injector hold-down clamp.
NOTE: The injector hold-down clamp is not removable on
all engines.
Use the injector remover, Part Number 3823024, to
remove the injector from the cylinder head.
NOTE: A small heel pry bar can also be used to pry up
the injector. Pry up the injector hold-down flange (part of
the injector body just above the cylinder head casting).
Clean and Inspect for Reuse
WARNING
When using solvents, acids, or alkaline materials for
cleaning, follow the manufacturer's recommendations
for use. Wear goggles and protective clothing to
reduce the possibility of personal injury.
CAUTION
Do not use any abrasives (such as glass beading,
sand paper, emery cloth, Scotch-Brite™ pads, etc) or
metallic items (including wire brushes made of any
metallic material) to clean the injectors. The use of
any cleaning method other than safety solvent and a
soft, clean, lint-free cloth will damage the nozzle holes
and cause performance issues.
Clean injector tip and body with safety solvent and a soft,
clean rag.
Inspect the injector tip for carbonization or corrosion.
Check for terminal damage to the solenoid.
Inspect the injector inlet and high-pressure connector tip
for damage.
Overheating will cause the nozzle to turn a dark yellow/tan
or blue color, depending on the degree of overheating.
Inspect the injector o-rings for damage and replace if
necessary.
Resistance between terminals must be less than 3.0
ohms.