Engine Not Operating; Tune-Up Procedure - Ford 1961 TRUCK 100 SERIES Shop Manual

PART 1 - 1 - GEN ERAL ENGINE SERVICE
1-7
ENGINE TROUBLE DIAG NOSIS GUIDE (Conti n ue d)
ENGINE OVERHEATS
(Continue d)
ENGINE FAILS TO REACH
NORMAL OPERATING
TEMPERATURE
LOSS OF COOLANT
EJ
TUNE-UP
The recommend ed Tune-Up
Schedule (Table I) is for either a
minor or a major tune-up. Perform
all operations in the sequence listed.
The recommended mileage interval
for a minor tune-up is 4000 miles
for off-highway operation and 8000
miles for highway operation. The
recommended mileage interval for a
major tune-up is 12,000 miles for
off-highway operation and 24,000
miles for highway operation. For a
detailed description of an operation
procedure, refcr to the operation
number under "Operation Proce-
dure."
TUNE-UP PROCEDURE
The tune-up is di vi ded into 3 major
parts.
In correct valve lash.
Low oi l level or incorrect viscos-
ity
o il used.
COOLING SYSTEM
Insufficient coolant.
Coolin g system leaks.
Drive belt tension incorrect.
TEMPERATURE SENDING
UNIT AND GAUGE
Unit or gauge defective (not indi-
cating correcl temperature), or con-
COOLING SYSTEM
Leaking radiator.
Loose or damaged ho se connec-
ti ons.
Water pump leaking.
Rad iator cap defective.
Overheating.
ENGINE
Cylinder he ad gasket defec ti ve .
The first part is performed with
th e engine not operating. The first
step co nsists of visual and mech anical
checks and adj ustments. The seco nd
step co nsists of an instrument check.
A lways follow the instructions of the
manufacturer of the test equipment
used.
The seco nd part of the tune-up
covers items that can be done while
the engine is warm ing up for carbu-
retor and valve adjustments.
The third part of the tune-up
should be done with the eng ine oper-
ating at normal operating tempera-
ture. For the engine to reach normal
operating temperature, it should be
operated for 30 minutes at fast idle
( 1200 rpm).
For more detailed information on
Radiator fins obstructed .
Thermostat defective.
Thermostat improperly installed.
Cooling system passages blocked.
Water pump inoperative.
IGNITION SYSTEM
Incorrect ignition tim ing.
stant vo lta ge regu lator defective.
COOLING SYSTEM
Thermostat in operative or of in-
correct heat ra nge.
Int a ke ma nifo ld to cylinder head
gaske t defective.
Cylinder head or intake mani fo ld
bolts not properly torqued.
Cyl ind er block core plugs leak-
mg.
Temperature se nding unit leak-
ing.
Cracked cylinder head or block,
or warped cylind er head or block
gasket surface.
corrective actio n to be taken when a
part icular defect is encountered,
refer to th e appropriate part of the
manua l.
At the end of
the 'Tune-Up Pro-
cedure," add itional engine checks
and adjustments are described for
use as necessa ry.
ENGINE NOT OPERATING
Perform th e following tests with
the engine off and at room tempera-
ture.
MECHANICAL CHEC KS, TESTS,
AND ADJU STMENTS
1. Clean, Adjust, And Test Spark
Plugs. Remove the wire from each
spark plug by grasping the moulded
cap on ly.