Jeep cherokee 1989 Owner's Manual page 49

leys spaced 12-to-1 6 inches apart, the belt should deflect 112-inch.
The tension on serpentine belts can only be checked using a belt ten-
sion gauge, available at auto parts stores (see illustration).
5 If adjustment is needed, either to make the belt tighter or looser,
it's done by moving the belt-driven accessory on the bracket. On later
models with a serpentine belt, belt tension is adjusted at the power
steering pump (or idler pulley if not equipped with power steering) (see
illustration).
For each component there will be an adjusting bolt and a pivot
6
bolt. Both bolts must be loosened slightly to enable you to move the
component.
7 After the two bolts have been loosened, move the component
away from the engine to tighten the belt or toward the engine to
loosen the belt. Hold the accessory in position and check the belt ten-
sion. If it's correct, tighten the two bolts until just snug, then recheck
the tension. If the tension is all right, tighten the bolts.
8 It will often be necessary to use some sort of pry bar to move the
accessory while the belt is adjusted. If this must be done to gain the
proper leverage, be very careful not to damage the component being
moved or the part being pried against.
9 To replace a belt, follow the above procedures for drivebelt adjust-
ment, but slip the belt off the pulleys and remove it. Since belts tend to
wear out more or less at the same time, it's a good idea to replace all
of them at the same time. Mark each belt and the corresponding pulley
grooves so the replacement belts can be installed properly.
10 Take the old belts with you when purchasing new ones in order to
make a direct comparison for length, width and design.
the bolt and locknut on the front of the power stewirig pump.
Typical four-cylinder engine serpentine drivebelt routing
The Motor Manual Guy
Chapter 1 Tune-up and routine maintenance
. .
SERPENTINE
BELT
If you are able to borrow either a Nippondenso or
Burroughs belt tension gauge, this is how it's installed on the
-
belt compare the reading on the scale with the specified
drivebelt tension
11 Adjust the belts as described earher In thls Sectlon.
12 When replacmg a serpent~ne drlvebelt (used on later models),
make sure the new belt routed correctly or the water pump could
turn backwards, causlna overheatma (see illustrations). Also, the belt
must completely engage the grooves in the pulleys.
. . .
loosen the two bolts on the rear of the power
steering pump and turn the adjusting bolt
Typical sir-cylinder engine serpentine drivebelt routing
BURROUGHS