NOTICE
When flushing the radiator, do not apply more
than 20 psi (138 kPa) air pressure. Excessive
pressure can damage the radiator or heater core.
3.3 Apply no more than 20 psi (138 kPa) air
pressure intermittently to help dislodge
sediment buildup in the core.
4. Drain the radiator, then flush the radiator until
clean water flows from it. Remove the flushing
gun.
5. Close the petcock.
6. Using clamps, connect the hoses to the radiator.
Torque the clamps 33 to 38 lbf·in
(370 to 430 N·cm).
IMPORTANT: The coolant capacity varies
depending on the engine and accessory
installation. After servicing the cooling system,
always verify that the coolant level is between
the MIN and MAX lines on the surge tank.
7. Fill the radiator with coolant. Refer to the engine
manufacturer’s service literature for specific
coolant information.
20–03 Fan Drive Inspecting
(Noise Emission
Control)
BorgWarner eViscous Fan Clutch
1. Check the fan for loose rivets and missing
weights. Check for bent, cracked, or missing
blades. Tighten loose components. Replace the
fan drive if necessary.
2. Check for adequate clearance between the fan
and the fan shroud or other engine compartment
components in both the engaged mode and the
disengaged mode. If the clearance is not
adequate, make the necessary adjustments.
3. Check the fan belt condition and the belt
alignment. Replace or correct as necessary.
4. Check for harness abrasion.
5. Check for fluid leaks from the clutch body.
Horton Advantage® Fan Clutch
1. Check the fan for loose rivets and missing
weights. Check for bent, cracked, or missing
blades. Tighten loose components. Replace the
fan drive if necessary.
2. Check for adequate clearance between the fan
and the fan shroud or other engine compartment
components in both the engaged mode and the
disengaged mode. If the clearance is not
adequate, make the necessary adjustments.
3. Check the fan belt condition and the belt
alignment. Replace or correct as necessary.
Horton HT650 Fan Drive
Check for friction facing wear condition. Replace
when worn to 1/16-inch (1.5-mm) thick, when oil
spotted, or when burn marks are visible.
Kysor K22RA, K22FA, and
K26RA Fan Drives
1. Check the fan for missing, cracked, chipped, or
damaged blades. Tighten loose components.
Replace damaged fans if necessary.
2. Check for adequate clearance around the fan.
The fan should be centered in the shroud to
prevent contact between the fan and the shroud.
3. Check the fan belt for proper alignment and
condition. If the belt is worn or frayed, replace
the belt.
4. Verify the fan drive engagement. With the engine
and ignition key switch off, apply at least 90 psi
(620 kPa) to the clutch; the fan should rotate
freely. Remove air pressure from the clutch and
the fan should not rotate.
5. With the fan drive disengaged, check for air
leaks at the front of the clutch and between the
clutch and the drive hub. If an air leak is
detected, the clutch seals and hub must be
inspected for wear or damage. If necessary, the
seals of the clutch can be replaced with a Kysor
rebuild kit. If inspection of the hub indicates
excessive wear, rebuild the hub using a hub
rebuild kit from Kysor.
6. Any time the clutch is removed for repair or
replacement, the pulley hub and bearings should
Engine Cooling/Radiator20
Business Class M2 Plus Maintenance Manual, 02/10/202320/2
To Next Page
Loading...
