Chevrolet 1988 Light Duty Truck Repair Manual page 107

6. ADJUST WORM BEARING PRELOAD
1 T ig hten w orm be aring ad ju ster u n til it bo tto m s then
loosen o n e -q u a rte r turn
2 C a re fu lly turn the w o rm sh a ft all the way to end o f travel
then tu rn back o n e-ha lf turn
3 T ig h te n a d ju ster plug u n til to rq u e w ren ch reads 0 6
to 1 0 N m (5 to 8 in lbs )
4. T ighten lo c k n u t using punch against edge of slot.
l l / l 6 " socke t — Due to
tolerances, som e s o c k ­
ets require a w ra p p in g
of card stock around
the serration s
Figure 4 — Model 525 — Chart C — Adjustm ent
MANUAL STEERING GEAR 3B2-5
7. ADJUST " OVER CENTER" PRELOAD
B a c k o f f p r e l o a d
ad ju ster u n til it stops,
then tu rn it in one fu ll
W ith gear at cen ter
of travel, che ck to rq u e
to turn stub shaft
(reading #1)
T u rn ad ju ste r in un til
to rq u e to tu rn stub shaft
is 0 5 to 1 2 N m (4 to
10 in lbs ) m ore than
re ading #1
To rqu e a d ju ste r lock
nut to 34 N m (25 ft lbs )
Prevent a d ju s te r screw
fro m t u r n in g w h ile
to rq u e in g lock nut
F-04649