TM 5-3805-280-24-1
Operational Checkout Procedure
HP (HIGH POWER)
YES: Go to next check.
MODE CHECK
NO: Check switch,
indicator, arm in sensor,
pump pressure sensor,
and harness. Go to
9005
Group 9015-15.
10
10
Check linkage and fast
T111983 UN27OCT97
T112183 UN13NOV97
idle speed stop at the
injection pump. Go to
A--HP (High Power) Mode Switch
Group 9010-20.
B--HP (High Power) Mode Indicator
Start the engine.
Auto-idle switch OFF.
Turn engine rpm dial clockwise to fast idle.
Push HP (high power) mode switch (A) on.
Did HP (high power) mode indicator (B) come on?
Operate the arm in function over relief (arm cylinder fully extended).
Is there some engine speed increase?
Push HP mode switch again to turn it OFF.
Does HP mode indicator go out?
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ENGINE BLOW-BY
Run engine at fast idle and check engine blow-by tube.
YES: Go to next check.
CHECK
Are fumes barely visible at the blow-by tube at fast idle,
NO: If blow-by is
with no load?
excessive. Go to
Compression Pressure
NOTE: Excessive blow-by indicates that piston rings and
Test in Group 9010-25.
cylinder liners do not seal off the combustion chamber.
This is a comparative check that requires some
experience to determine excessive blow-by.
T7700AC
UN10FEB92
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