Jeep Wrangler 1997 Manual - page 1048
NOTE: Do not use rags or shop towels to wipe off
valve body components. Lint from these materials
will adhere to the valve body components. Lint will
interfere with valve operation and may clog filters
and fluid passages.
Inspect the throttle and manual valve levers and
shafts. Do not attempt to straighten a bent shaft or
correct a loose lever. Replace these components if
worn, bent, loose or damaged in any way.
Inspect all of the valve body mating surfaces for
scratches, nicks, burrs, or distortion. Use a straightedge
to check surface flatness. Minor scratches may be
removed with crocus cloth using only very light pressure.
Minor distortion of a valve body mating surface
may be corrected by smoothing the surface with cro-
cus cloth. The cloth should be in sheet form and be
positioned on a surface plate, sheet of plate glass, or
equally flat surface. However, if distortion is severe
or any surfaces are heavily scored, the valve body
will have to be replaced.
CAUTION:
Many of the valve body valves and
plugs are made of coated aluminum. Aluminum
components can be identified by the dark color of
the special coating applied to the surface (or by
testing with a magnet). DO NOT polish or sand alu-
minum valves or plugs with any type of material, or
under any circumstances. This practice might dam
age the special coating and cause the valves and
plugs to stick and bind.
Inspect the valves and plugs for scratches, burrs,
nicks, or scores. Also inspect the coating on the alu-
minum valves and plugs (Fig. 170). If the coating is
damaged or worn through, the valve (or valve body)
should be replaced.
Aluminum valves and plugs should not be sanded
or polished under any circumstances. However, minor
burrs or scratches on steel valves and plugs can be
removed with crocus cloth but do not round off the
valve or plug edges. Squareness of these edges is
vitally important. These edges prevent foreign matter
from lodging between the valves, plugs and bore.
Inspect all the valve and plug bores in the valve body.
Use a penlight to view the bore interiors. Replace the
valve body if any bores are distorted or scored. Inspect
all of the valve body springs. The springs must be free
of distortion, warpage or broken coils.
Trial fit each valve and plug in its bore to check free-
dom of operation. When clean and dry, the valves and
plugs should drop freely into the bores. Valve body bores
do not change dimensionally with use. If the valve body
functioned correctly when new, it will continue to oper-
ate properly after cleaning and inspection. It should not
be necessary to replace a valve body assembly unless it
is damaged in handling.
Fig. 170 Valve Body Components
21 - 142
TRANSMISSION AND TRANSFER CASE
TJ
CLEANING AND INSPECTION (Continued)