5.
If possible, drain the engine block of coolant.
6.
Fill the cooling system with water.
7.
Operate the engine until the water reaches oper-
ating temperature.
8.
Drain the water and coolant mix from the cooling
system.
9.
Fill the cooling system with water again.
10. Drain the water from the cooling system.
11. Fill the cooling system with the appropriate cool-
ant. Refer to the engine manufacturer’s service
literature for specific coolant information.
20–03 Fan Clutch Check (Noise
Emission Control)
Borg Warner (Kysor) K26RA Fan
Clutch
1.
Disconnect the batteries at the negative termi-
nals. Drain all air from the air system.
2.
Measure the distance from the back surface of
the fan clutch retaining plate to the forward-most
edge of the fan belt pulley. See
, Ref. A.
3.
Disconnect the line from the air inlet of the air
cylinder. Connect a shop air hose to the inlet.
4.
Apply a minimum of 100 psi (690 kPa) air pres-
sure to the air cylinder—the bearing housing will
move backwards, disengaging the clutch. Again,
measure the distance from the back surface of
the retaining plate to the forward-most edge of
the fan belt pulley.
5.
Compare the two measurements; if the difference
between the two measurements exceeds 0.150
09/14/2009
1
2
3
f200728
1.
Transmission Coolant Hose
2.
Drain Plug
3.
Lower Radiator Hose
Fig. 2, Typical Coolant Drain Plug Location
f200237a
1
2
3
4
5
6
05/27/93
A
With the fan clutch engaged, measure the distance at
A
;
measure it again with the fan clutch disengaged.
1.
Bearing Housing
2.
Retaining Plate
3.
Fan Pulley
4.
Air Inlet (from solenoid
valve)
5.
Air Cylinder
6.
Fan
Fig. 3, Kysor K26RA Fan Clutch Lining Wear Check
Engine Cooling/Radiator
20
122SD and Coronado 132 Maintenance Manual, February 2016
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