Drive Belt Adjustment: Separate belts are used to
drive fan, governor and alternator (Figure 35). Main-
tain correct adjustment of these belts to provide
proper engine cooling and alternator output. Check
belts for cracks and wear occasionally, and replace
when necessary.
To adjust fan belt, loosen fan bracket screws, then
move bracket up or down until adeflection of 1/2 inch
(13 mm) is obtained between crankshaft pulley and
fan pulley, with light thumb pressure on the belt.
To adjust alternator or governor belt, loosen link
clamp screw and the mounting bolts, move alternator
or governor toward or away from engine until a
deflection of 1/2 inch (13 mm) is obtained between
pulleys, with light thumb pressure on belt.
.GOVERNOR
PULLEY
'WATER PUMP
PULLEY
1/2
•
DEFLECTION
ALTERNATOR
PULLEY
WATER PUMP
PULLEY
1/2 DEFLECTION
CRANKSHAFT
PULLEY
FAN .
PULLEY
WATER PUMP
PULLEY
-4 — 1/2 DEFLECTION
CRANKSHAFT
PULLEY
FIGURE 35. DRIVE BELT ADJUSTMENT
BATTERIES
Check the condition of the starting batteries at least
every two weeks. See that connections are clean and..
tight. A light coating of grease will retard corrosion ar
terminals. Keep the electrolyte at the proper level
above the plates by adding distilled water.
TUNE
UP
ONAN suggests that the following specifications for
tune up be used in preference to those given in the
Ford manual. This is due to a difference in
r/min
(no
idle speed) and removal of automatic vacuum ad-
vance.
TABLE
6. TUN
E-UP
SPECIFICATIONS
ADJUSTMENTS
EK SERIES
EM SERIES
Spark Plug Gap, All Models
Spark Plug Gap, Gas Only Models
Ignition Points — Gap Setting
Dwell Angle
Valve Clearance Setting
.028"
.025"
.024"
- .026"
35° - 39°
Zero Lash
- - .028" •,.
.025"
.024"
- .026"
35° - 39°
Zero Lash
33
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