Figure 11-4. Lash Adjuster Clearance.

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

11-4