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MAINTENANCE
Removing the Fan Belt
To remove the fan belt, loosen fan spindle nut
"C" (Illust. 27) and slide the fan and hub assembly
to the bottom of the groove on the crankcase front
cover. The fan belt can then be slipped over the
bottom drive pulley and worked up over the fan
blades.
Replacing the Fan Belt
Replace the fan belt when it becomes· soaked
with grease, or when it is so badly worn that it does
not drive the fan at the proper speed.
When ·replacing the belt, reverse the procedure
outlined under "Removing Fan Belt," except that
belt can be started on the lower pulley by hand,
and by slowly cranking the engine, the belt will
find the correct position.
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G enerator Belt
After the fan belt tension has been adjusted,
move the generator toward or away from the engine
to get the correct generator belt tension; then tighten
nuts "A" and "B." The generator belt should be
tight enough as not to allow slippage, but not so
tight as to cause side thrust on the generator bearing.
Allow ¼-inch slack. See Illust. 27 A.
Fan Hub Lubrication
Every six months or after every 500 hours of opera-
tion, whichever occurs first, remove oil retainer screw
"F" (Illust. 27) and turn the fan assembly so that the
oil filler hole is at the right hofrzontal position. Add .
engine oil until the oil reaches the level of the hole.
Now turn the assembly so that the hole is on the
bottom ;nd allow any excess oil to drain out. The
oil is then up to level of the top of the stand pipe
lllust. 28
Fan hub partially disassembled showing oil level.
28
(approximately
-lo pint). See Illust.
28.
Replace the
oil retainer screw and be sure that the retainer screw
gasket is in place.
Note: The rubber gasket located behind the
hub at "E" (Illust. 27) is used for shipping purposes
only. It d9es not have to be replaced when worn out.
Air Cleaning System
Clean air for combustion is assured by an oil-type
air cleaner. A heavy screen in the air intake· cap
prevents large particles from entering the air cleaner.
The air then passes to the oil cup where it goes
through a bath of oil. As the air rises to the intake
manifold, it passes through a series of oil-bathed
screens and the fine dust is removed. As the oil
from the screen works back down, it carries the
dirt with it and settles in the oil cup. · Never allow
dirt to build up in the cup more than
½
inch deep.
Oil Cup Service
Remove the oil cup by pushing the oil cup bail
toward the engine. See Illust.
29.
Clean and refill
the oil cup every day, or every 10 hours of operation
(more frequently when operating under dusty
conditions )i , Refill the oil cup to the oil level bead
with the same grade of oil used in the engine cra~-
case. The capacity of the oil cup is
½
U. S. pint
for the Donaldson Air Cleaner and
¾
p.
S. pint
for the United, whichever type is useg-· (the name
appears on the air cleaner). Do not remove the oil
cup while the engine is operating. Before replacing
the oil cup, clean or wipe oil or grit from tl:ie top
bead of the oil cup.
Air Intake Cap and Screen
The screen in the air intake cap prevents chaff
and other coarse dirt from getting into the air
cleaner. Keep this screen dean and free from all
chaff, oil,, dust, or paint, as clogged holes in the
screen will reduce the power
pf
the engine by
restricting the flow of air.
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Washing the Cleaner
After every 60 hours of operation-particularly
if operating the tractor
in an atmosphere heavily
laden with dust, chaff or, lint-remove the entire
air cleaner from the tractor, disassemble it (Illust.
29A)
and wash the parts thoroughly
in kerosene.
Be sure to dean out the air intake pipe.
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