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TM 10-3930-671-24
4.3. Engine Tune-Up
Tune-Up Preparation ..................................................................... F-73
Preliminary Checks ........................................ ............................... F-74
Cranking Test ................................................................................ F-75
Tune-Up Procedures ..................................................................... F-76
Tune-Up Completion ........................................ ............................. F-77
Engine Tune-Up consists of:
1)
Preliminary checks to be sure that all
engine systems are functioning correctly,
and
2)
Tune-up
procedures,
which
include
performing
tests,
making
minor
adjustments
and
replacing
minor
components as necessary to bring an
engine up to its peak level of performance.
Also refer to Section 4.2, Engine Troubleshooting.
Tune-Up Preparation
•
Park truck in a well-ventilated area. Do not
smoke or perform maintenance near open
flame or other sources of ignition. Do not
disconnect
any
lines
when
exhaust
manifold is excessively hot or fire may
result
in
injuries
and
damage
to
equipment.
•
Stop engine before checking battery
terminals or electrical connections. Do not
hold ignition wires with bare hands since
shocks or other injuries can result. Battery
acid can cause corrosive burns. Always
wear eye protection. Use of jumper cables
or battery charging should be done only as
directed
by
manufacturer's
safety
instructions.
NOTE
Prior to performing this service procedure, it is
recommended that you first:
•
Put blocks under the upright rails.
•
Raise the drive wheels off the floor.
•
Return all controls to NEUTRAL, apply the
parking brake, and turn key switch OFF,
except as noted.
Open and remove both side doors, and raise the seat
deck. Be sure the seat deck support is securely latched.
Minimum Tools Required
•
Tachometer
•
Torque Wrenches
•
Voltmeter
•
Vacuum Gauge
•
Timing Light
•
Jumper Wire
F-73
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