freightliner PE116DC, Maintenance Manual

Page: 44 / 164

2. Inspect the electrical connections and wires to
the fan clutch solenoid; see
Fig. 6 . Secure the
connection if loose; replace wires and connectors
if damaged.
3. Clean the fan clutch air solenoid valve filter, if
equipped, as follows.
3.1 Unscrew the fan clutch solenoid valve air
filter assembly and remove the filter ele-
ment; see
Fig. 7 .
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, then install it on the vehicle.
4. Check the fan for bent, cracked, or damaged
blades. Replace if damaged. Check for adequate
clearance between the fan and other compo-
nents.
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 fan clutch from a distance.
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 vehicle Workshop Manual for
troubleshooting and repair procedures.
8. With the air system charged to 120 psi (827
kPa), check the fan clutch for audible air leaks,
using a suitable listening device.
Check at the solenoid valve, the air filter assem-
bly, and the air hoses and fittings. See
Fig. 8 .
Using a wet finger or a soapy water solution,
check for a leak in the same areas.
9. If a leak is detected, remove the fan blade. In-
stall a new seal kit. See
Group 20 of the vehicle
Workshop Manual for repair procedures.
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
f200724
07/24/2009
1
2
1. Air Filter Housing
2. Solenoid Valve
Fig. 6, Horton DriveMaster Air Solenoid Valve
07/24/2009 f200725
1
2
3
1. Filter Element
2. Filter Bowl
3. Bleed Valve
Fig. 7, Horton DriveMaster Solenoid Valve Air Filter
Engine Cooling/Radiator
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New Cascadia Maintenance Manual, November 2019
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