Horton DRIVEMASTER Instrucciones De Instalación página 18

PROBLEM
III. Fan Drive fails to
engage/disengage (con't)
IV. Fan Drive cycles
frequently
V. Fan Drive engaged,
engine running hot.
22748-J-0407
PROBABLE CAUSE
Piston will not actuate
1. Piston seized due to
contamination or dry seals.
Electrical Problem
1. Poor ground wire connection.
2. Improper temperature control
settings.
3. A/C Pressure Switch setting
too low.
4. Restriction in front of radiator,
blocking air flow.
5. Faulty Thermal Switch.
6. Faulty Air-Temp Switch.
7. Vehicle Coolant level too low.
1. Restriction in front of radiator.
2. Fan capacity not large
enough.
3. Problem in cooling system.
18
SOLUTION
1. Clean the air supply and
install a Rebuild Kit.
1. Check electrical connections.
2. Check temperature setting
of all controls. Thermal
Switch should engage the Fan
o
Drive 10 F higher than the
full open temperature of the
thermostat.
3. Check A/C Pressure Switch.
Use higher switch.
4. Check shutter operation,
winter fronts, or obstruction in
front of radiator.
5. Replace the Thermal Switch.
6. Replace the Air-Temp Switch.
7. Fill to manufacturer's
recommended level.
1. Make sure nothing is
obstructing the air flow
through the radiator.
2. Refer to specifications.
3. Refer to engine manual.