Cooling System Fans - Jeep cherokee 2000 Service Manual

7 - 38 COOLING SYSTEM
REMOVAL AND INSTALLATION (Continued)
Fig. 54 Generator Belt Tension Adjust Bracket
1 – TENSION ADJUSTMENT BOLT
2 – UPPER ALTERNATOR NUT
CAUTION: When installing the serpentine acces-
sory drive belt, the belt MUST be routed correctly. If
not, the engine may overheat due to the water
pump rotating in the wrong direction. Refer to (Fig.
51) (Fig. 52) for correct belt routing.
(2) Install new belt.
(3) Using serpentine belt tension gauge, tighten
adjusting bolt until belt reaches proper tension. Refer
to Belt Tension at the rear of this section for proper
belt tension.
(4) Tighten alternator upper and lower mounting
bolts.
(5) After generator and adjust bracket have been
tightened into position, recheck belt tension. Adjust if
necessary.

COOLING SYSTEM FANS

REMOVAL
Some engines have the mechanical fan/viscous fan
drive assembly mounted directly to the water pump
hub (Fig. 55). It may also be mounted to a hub/bear-
ing attached to an aluminum bracket on the right
front side of engine (Fig. 56).
(1) Loosen but do not remove at this time, the four
fan hub mounting nuts (Fig. 55) (Fig. 56).
(2) Remove accessory serpentine drive belt. Refer
to Belt Service in the Engine Accessory Drive Belt
section of this group.
(3) Some models with certain engines may require
the removal of the fan shroud to remove the viscous
fan drive. The fan shroud and fan blade/viscous fan
Fig. 55 Water Pump Mounted Cooling Fan
1 – THERMAL VISCOUS FAN DRIVE
2 – (4) FAN BLADE-TO-VISCOUS DRIVE BOLTS
3 – (4) FAN HUB-TO-PUMP PULLEY STUDS
4 – WATER PUMP
5 – WATER PUMP PULLEY
6 – FAN BLADE
7 – (4) FAN HUB-TO-PUMP PULLEY NUTS
drive should be removed from the vehicle as one
assembly.
(4) Remove four fan hub mounting nuts (Fig. 55)
(Fig. 56) and remove fan/viscous fan drive assembly
from vehicle.
(5) After removing fan blade/viscous fan drive
assembly, do not place thermal viscous fan drive in
horizontal position. If stored horizontally, silicone
fluid in viscous fan drive could drain into its bearing
assembly and contaminate lubricant.
INSTALLATION
(1) Assemble fan blade to viscous fan drive.
Tighten mounting bolts to 27 N·m (20 ft. lbs.) torque.
(2) Position mounting flange of fan blade/viscous
fan drive assembly onto hub. Install four nuts and
tighten to 24 N·m (18 ft. lbs.) torque. Tighten the
first two nuts 180 degrees apart. Then tighten last
two nuts.
CAUTION: When installing a serpentine accessory
drive belt, the belt MUST be routed correctly. If not,
the engine may overheat due to the water pump
rotating in the wrong direction. Refer to appropriate
Engine Accessory Drive Belt Schematic in this
group for correct belt routing.
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