3.2 Clean the filter element with cleaning sol-
vent.
3.3 Using a clean, lint-free cloth, wipe off any
excess solvent.
3.4 Reassemble the clutch valve solenoid air
filter assembly, and install it on the ve-
hicle.
4. Visually check the fan for bent, cracked, or dam-
aged blades. Replace if damaged. Check for ad-
equate clearance between the fan and other
components.
5. Check the fan belt for wear, tension, and align-
ment. Correct, if necessary.
6. Check for wear on the friction facing. Replace
the friction facing if it is worn to a 3/16-inch (4.8-
mm) thickness or less. Also check the facing for
signs of oil contamination or burn marks. If evi-
dence of oil or burn marks are found, replace the
friction facing.
7. Connect the battery cables. Start the engine, and
charge the air system to 120 psi (827 kPa).
Manually engage and disengage the fan clutch.
Check the fan and the fan clutch from a dis-
tance. Look for vibration, fan blade contact, fan
clutch slippage, and overall fan clutch operation.
If the fan clutch does not operate correctly, see
Group 20 of the 108SD and 114SD Workshop
Manual for troubleshooting and repair proce-
dures.
8. With the air system charged to 120 psi (827
kPa), check for air leaks at the fan clutch, sole-
noid valve, air hoses, and fittings from the fan
clutch to the air tanks. Use a suitable listening
device, and, as needed, a soapy water solution.
9. If a leak is detected, remove the fan blade. In-
stall a new seal kit. See Group 20 of the 108SD
and 114SD Workshop Manual for repair proce-
dures.
10. Check the fan drive for discoloration or any other
signs of slipping or overheating.
NOTE: The fan clutch may slip if the air supply
pressure is below 70 psi (483 kPa) or if there is
a leak inside the fan clutch. Any leak must be
remedied.
11. Check the fan clutch bearings.
11.1 Turn the fan in both directions and feel
for worn hub bearings.
11.2 If possible, remove the drive belt and
check for worn sheave bearings by turn-
ing the sheave in both directions.
11.3 If either the hub or sheave bearings are
worn, replace them using a Horton Drive-
Master Super Kit.
For repair kit information, see Horton’s
website,
www.hortonww.com.
For instructions, see Group 20 of the
108SD and 114SD Workshop Manual.
Engine Cooling/Radiator 20
108SD and 114SD Maintenance Manual, May 2018 20/3
To Next Page
Loading...
