ENGINE MANAGEMENT SYSTEM
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2．Handling - DOs & DONTs
3.5 FUEL INJECTOR HANDLING
ACTION REASON
DO NOT: Re-use injector seal rings if at all
possible. If no other choice exists, take
extra care in inspecting the seal rings for
damage.
Leakage.
DO NOT: Dip injector tips into lubricants. Can plug injector spray orifices.
DO NOT: Cycle injector repeatedly without
fuel pressure.
Damage to internal mechanical components.
DO NOT: Pulse (actuate) a suspected high
leak rate injector (leak >50 sccm air).
Can dislodge internal contamination if
present and preclude root cause analysis.
DO NOT: Allow water to enter fuel system
from air lines, etc. during leak checks.
Can damage injectors.
DO NOT: Contact or apply load to the
injector tip for installation.
Apply load to 45 deg angle on nylon over
mold see
DO NOT: Pound injectors into manifold
during assembly to engine.
Can damage injectors or seal rings.
DO NOT: Apply excessive side loads to
electrical connectors.
May cause loss of electrical continuity.
DO NOT: Use any dropped unit.
Internal damage may have occurred.
DONOT:Store injectors, rails, or
subassemblies including engines on which
the injectors have been installed in an
unprotected environment.
External contamination can damage the
injector electrically and/or mechanically.
DO NOT: Use the injector as a handle. Do not use the injector to lift assemblies
DO NOT: Rack, stage, or handle parts in a
manner that allows contact between parts.
Damage will occur.
DO NOT: Remove packing in a way that
allows contact between parts.
Damage could occur due ton contact
between parts.
DO NOT: Tap on fuel injectors to correct any
malfunction.
Can damage injector.
DO NOT: Replace the injector with other
part number not recommended for this
application
Will severely affect the performance of the
injector
DO: Take extra care when installing new
fuel seal ring over injector inlet flange.
Prevent tearing seal ring during installation.
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