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Page Title: Figure 11-4. Lash Adjuster Clearance.
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TM 10-3930-633-34
and extreme care should be exercised in applying
three bolts (40) and washers (41) attaching side
this compound to the bearing adjuster, as the
cover (39) to housing (35). Remove pitman arm
compound must be kept away from the worm-
nut' (24).
shaft bearing. Also apply steering gear lubricant
(3) Pull the side cover (39) with the output
to wormshaft bearings and seal, output shaft,
shaft (37) attached from the housing.
bushings and seal, wormshaft grooves and ball
NOTE
nut rack teeth to provide initial lubrication.
If the sector does not clear the opening in the
housing easily, turn the wormshaft by hand until the
(1) Wrap wormshaft (stub shaft) serrations
sector will pass through the opening in the housing.
with plastic (electrician's) tape to prevent cutting
(4) Remove the worm bearing adjuster (16),
seal lip during shaft installation.
adjuster locknut (17) and lower bearing (20) from
(2) With wormshaft seal, bearings and
housing (35) .
bearing cups installed and ball nut assembly
(5) Pull shaft and nut assembly (18) out of
installed on wormshaft, slip upper ball bearing
housing from the bottom.
over wormshaft and insert wormshaft and nut
(6) Remove locknut (44) from lash adjuster
assembly into housing, feeding end of shaft
screw (45). Remove side cover from output shaft
through upper ball bearing cup and seal.
by turning adjuster screw clockwise. Slide ad-
(3) Position the lash adjuster with shim in
juster (42) and shim (43) out of slot in end of
the slotted end of output shaft. Check the end
output shaft (37).
clearance, which should not be greater than .002
c. Cleaning and Inspection.
inch. If clearance is greater than .002 inch, a
(1) With the steering gear completely
steering gear lash adjuster shim unit is available.
disassembled, wash all parts in cleaning solvent.
It contains four shims: .063 inch, .065 inch, .067
Dry them thoroughly with air. With a magnifying
inch and .069 inch thick. See figure 11-4.
glass, inspect the bearings and bearing cups for
signs of indentation. Also check for any signs of
chipping or breakdown of the surface. Any parts
that show signs of damage should be replaced.
(2) Inspect all seals. Any seal that is worn or
has been removed should be replaced.
(3) Inspect the output shaft for wear and
check the fit of the shaft in the housing bushings.
(4) Inspect the fit of the output shaft in its
bushing in the side cover. If this bushing is worn,
a new side cover and bushing assembly should be
installed.
(5) Check steering gear wormshaft assembly
for bent or damaged shaft. Never attempt to sal-
vage steering parts by welding or straightening.
d. Repair.
(1) Replace side cover and bushing as an
Figure 11-4. Lash Adjuster Clearance.
assembly if bushing is worn.
(2) Press in new output shaft bushings, if
(4) After lash adjuster end clearance has been
worn.
adjusted, start output shaft pilot into bushing in
(3) Replace seals, and gaskets prior to
side cover. Then, using a screwdriver, through
reassembly.
the hole in cover, turn lash adjuster in a coun-
(4) Replace entire ball nut and shaft if there is
terclockwise direction to pull output shaft pilot
evidence of sticking or binding.
into its bushing as far as it will go.
e. Reassembly. After a major service overhaul
(5) Rotate wormshaft by hand until ball nut
where all of the lubricant has been washed out of
is about in the center of travel. This is to make
the steering gear assembly, the threads of the
sure that the rack and sector will engage properly
adjuster, side cover bolts and lash adjuster
with center tooth of the sector entering center
should be coated with a suitable nondrying, oil-
tooth space of the nut.
resistant sealing compound such as Permatex No.
(6) Place a new gasket on side cover, then
2 or equivalent. This is to prevent leakage of gear
push side cover assembly, including output shaft,
lubricant from the steering gear assembly. The
into place. After making sure there is come lash
compound should not be applied to female threads

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