Chevrolet 1977 10 Series, Руководство по ремонту, Страница: 84 / 468

4B-12
OVERHAUL MANUAL
PROTECTIVE
TUBE OR PIPE
REAR PINION BEARING
INSTALLER
Fig. 4 B -2 3 --D riv e P in io n Rear B e a rin g In s ta lla tio n
when Holder J-8614-11 will no longer pivot freely as
pinion is rotated, bearing preload specifications are being
neared. F u rth er tightening should be done only after nut
and washer installation and preload has been checked
with a torque wrench.
9. Lubricate cavity between end of pinion splines and
pinion flange with a non-hardening sealer (such as Permatex
Type A or equivalent) and install washer. Lubricate new nut
threads with a liberal am ount of hypoid lubricant, and install
on pinion snugly.
10. Check preload by using an inch pound torque
wrench such as J-5853 as shown in Figure 4B-26.
NOTE:
A fter torque has been checked, final tightening
should be done very cautionsly. For example, if when
checking, torque was found to be 5 inch pounds,
additional tightening of the pinion nut as little as 1/8
turn can add 5 additional inch pounds drag. Therefore,
the pinion nut should be further tightened only a little
at a time and torque should be checked after each slight
Fig. 4 B -2 5 --D riv e P in io n F la n g e In s ta lla tio n
am ount of tightening. Exceeding torque specifications
may compress the collapsible spacer too far and require
its replacement.
11. While observing the preceding caution, carefully set
preload drag at 20-25 in lb. on new bearings or 10-15 in. lb.
on reused bearings.
12. R otate pinion several times to assure that bearings
have been seated. Check preload again. If drag has been
reduced by rotating pinion, re-set preload to specification.
CHECKS AND A D JU STM EN TS
Four adjustm ents are essential for proper operation of
the differential and its related parts. These adjustm ents are
a)Pinion Bearing Preload, b)Side Bearing Preload c(Pinion
D epth and d)Ring G ear-to-Pinion Backlash.
Pinion Bearing Preload is set to specifications in step 11
o f "Drive Pinion- Installation and Adjustm ent".
Side Bearing Preload is set to specifications in step 6 o f
"Differential Case-Installation and Adjustm ent".
Following service to the Differential Case or to the Drive
Pinion and Ring Gear, a G ear T ooth Contact Pattern Check
must be made to verify the accuracy of the work in setting
Fig. 4B -2 4~ ln sta lling Pinion Oil Seal Fig. 4B -2 6 -M e a s u rin g Rotating Torque