Wiper Blade Inspection And Replacement; Engine Oil And Filter Change - Jeep cherokee 1989 Owner's Manual

the line has not been bent or crimped and that cracks have not started
in the line.
1 2 If a section of metal fuel line must be replaced, only seamless steel
tubing should be used, since copper and aluminum tubing don't have
the strength necessary to withstand normal engine vibration.
1 3 Check the metal brake lines where they enter the master cylinder
and brake proportioning unit (if used) for cracks in the lines or loose
fittings. Any sign of brake fluid leakage calls for an immediate thorough
inspection of the brake system.

1 1 Wiper blade inspection and replacement

Refer to illustrations 1 1.6a and 1 1.66
1
The windshield wiper and blade assembly should be inspected
periodically for damage, loose components and cracked or worn blade
elements.
2 Road film can build up on the wiper blades and affect their effi-
ciency, so they should be washed regularly with a mild detergent
solution.
3 The action of the wiping mechanism can loosen the bolts, nuts
and fasteners, so they should be checked and tightened, as necessary,
at the same time the wiper blades are checked.
4 If the wiper blade elements (sometimes called inserts) are cracked,
worn or warped, the bladelarrn assemblies should be replaced with
new ones.
5
Pull the wiper bladelarm assembly away from the glass.
6
Lift the release lever and slide the blade assembly off the wiper
arm and over the retaining stud (see illustrations).
7
Compare the new bladelarm assembly to the old one for length,
design, etc.
8
Reinstall the blade assembly on the arm, wet the windshield and
check for proper operation.
On windshield wipers, insert a screwdriver under
the wiper release lever, lift up and slide the windshield
wiper assembly off the arm stud
On rear wipers, lift the release lever (A), then slide
the wiper off the stud
The Motor Manual Guy
Chapter 1 Tune-up and routine maintenance
Refer to illustrations 12.3, 12.9, 12. 14, 12. 16 and 12. 18
1 Frequent oil changes are the most important preventive mainte-
nance procedures that can be done by the home mechanic. As engine
oil ages, it becomes diluted and contaminated, which leads to premature
engine wear.
2 Although some sources recommend oil filter changes every other
oil change, we feel that the minimal cost of an oil filter and the relative
ease with which it is installed dictate that a new filter be installed every
time the oil is changed.
3 Gather together all necessary tools and materials before beginning
this procedure (see illustration).
4 You should have plenty of clean rags and newspapers handy t o
mop up any spills. Access to the underside of the vehicle is greatly
improved if the vehicle can be lifted on a hoist, driven onto ramps or
supported by jackstands. Warning: Do not work under a vehicle which
is supported only by a bumper, hydraulic or scissors-type jack,
12.3 These tools are required when changing the
engine oil and filter
1 Drain pan It should be fairly shallow in depth, but
-
wide in order to prevent spills
-
2 Rubber gloves When removing the drain plug and
filter i t is inevitable that you will get oil on your hands
(the gloves will prevent burns)
3 -
Breaker bar Sometimes the oil drain plug is pretty
tight and a long breaker bar is needed to loosen i t
4 Socket
To be used with the breaker bar or a ratchet
(must be the correct size to fit the drain plug)
5 Filter wrench This is a metal band-type wrench,
which requires clearance around the filter to be effective
6 Filter wrench This type fits on the bottom of the
filter and can be turned with a ratchet or breaker bar
(different size wrenches are available for different types
of filters)
1-15