GMC 1989 Light Duty Truck Repair Manual page 107

6 . A D JU S T W O R M B E A R IN G PR E LO A D
1 T i g h te n w o r m b e a rin g ad juster until it b o t t o m s then
l o o s e n o n e - q u a r t e r turn
2 C a r e f u l l y turn the w o r m s h a f t all the wa y to e n d of travel
then turn b a c k o n e - h a l f turn
3 T ig h te n a d ju st e r p lu g until to r q u e w r e n c h r e a d s 0 6
to 1 0 N m (5 to 8 in lbs )
4. Tig h te n l o c k n u t using p u n c h against edge of slot.
MANUAL STEERING GEAR 3B2-5
F igure 4— M odel 525 — C hart C — A d ju stm e n t
7. A D JU S T "OVER C E N T E R " P R E LO A D
B a c k o f f p r e l o a d B
ad j u s t e r until it stops,
then tu rn it in o n e full
W ith g e a r at c e n te r
of travel, c h e c k t o r q u e
to turn stu b shaft
(read ing #1)
T u r n ad j u s t e r in until
t o r q u e to tu rn s tu b shaft
is 0 5 to 1 2 N m (4 to
10 in lbs.) m o r e than
T o r q u e ad j u s t e r lo c k
nut to 34 N m (25 ft lb s )
P r e v e n t ad j u s t e r s c r e w
f r o m t u r n i n g w h i l e
to r q u e in g lo c k nut
F-04649