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28
LUBRICATION AND MAINTENANCE
IMPORTANT: Do not remove the thermostat in an
attempt to improve the cooling. This will cause the
engine to run below normal working temperatures,
resulting in excessive engine wear.
If it ever becomes necessary to install a new
thermostat, it should be positioned in the recess of
the water outlet connection so that the heat element
(spring end) will be in the cylinder head of the
engine.
Fan BeIt: A belt-driven fan on the engine draws air
through the fins of the radiator to cool the coolant in
the radiator. A slipping fan belt will lower the
efficiency of the fan, resulting in the engine running
too hot. If the belt is too tight, it will shorten the
alternator bearing life. A correctly tightened belt will
deflect10 to 15mm when 9 to 11kg thumb pressure
is applied midway between the belt pulleys. Check
the condition and tension of the fan belt every
200hours. If the belt shows signs of cracking or
fraying, install a new belt.
To Adjust Belt Tension:
1. Loosen the alternator mounting bolts, Figure
37.
WARNING: To avoid personal injury
never attempt to loosen or tighten the
bolts when the engine is running.
2. Pry the alternator away from the engine and
tighten the mounting bolts.
3. Recheck belt deflection.
Figure 37 - Alternator Mounting Bolt
ENGINE SPEED
The adjustment for idle and maximum no load speed
settings on your tractor were made at the factory
Normally the engine maintains its speeds.
However, the low idle speed only may be adjusted
as follows
1. Move the throttle lever fully rearward. This is
the idle position.
2. Start the engine and when at normal
operating temperature, adjust the stop bolt to
obtain an engine speed of 1400-1 500 rpm.
Tighten the lock nut to secure the stop bolt,
Figure 39.
NOTE: Make sure to be no free-travel between the
wire and stop bolt with the turn buckle when
adjusting the low idle speed.
The maximum no load speed is 3350-3450 rpm. If it
is necessary to adjust the maximum speed, consult
with your RANSOMES Dealer.
Figure 39 - Engine Speed Adjustment