GMC 1990 Light Truck Repair Manual page 107

6. ADJUST WORM BEARING PRELOAD
1 T igh ten w orm b e a rin g ad ju ste r until it bo tto m s then
lo o sen o n e-q u arte r turn
2 C a re fu lly turn the w orm sh aft all the w a y to e n d ot travel
then turn b ack o n e -h a lf turn
3 T ig h te n ad ju ste r p lu g until to rq u e w re n ch re a d s 0.6
to 1 0 N m (5 to 8 in. lb s )
4 . T igh ten lo ck n u t using p u n ch against edge o f slot.
T O R Q U E
W R E N C H '
1 1 / I S " s o c k e t — D ue to
to le ra n ce s, s o m e s o c k ­
e ts require a w rap p in g
o f c a r d sto c k aro u n d
the serra tio n s
Figure 4— Model 525 — Chart C — Adjustment
MANUAL STEERING 3B2-5
7. ADJUST "OVER CENTER" PRELOAD
B a c k o f t p r e l o a d B
ad ju ste r until it sto p s,
then turn it in o n e lull
of travel, c h e c k to rq u e
to turn stu b shaft
(re ad in g « 1 )
Turn ad ju ste r in until
to rq u e to turn stu b sh a ft
is 0 .5 to 1 2 N m (4 to
10 m l b s ) m ore than
re ad in g « 1
T o rq u e ad ju ste r lo ck
nut to 3 4 N m ( 2 5 ft lb s )
P reven t a d ju ste r s c r e w
fr o m t u r n i n g w h i l e
to rq u em g lock nut
F4649