REAR AXLE DIFFERENTIAL CARRIER 4-6 i. J-6266-31
(HEAVY DUTY ONLY)
DIAL INDICATOR
Position Tool J-6266-28 in carrier as shown in Fig ure 15A. Swing tool body so that plunger does not touch gauge plate, and set indicator dial at zero.
NOTE: Barrel Adapters Tool J-6266-31 must be used when gauging heavy- duty axle. Make sure adapters are seated in differential bearing bores of carrier before measuring depth. PLUNGER
j.
Slowly swing inner end of tool plunger across gauge plate until highest indicator reading is obtained. Re cord this m easurem ent and recheck to see th at it is correct. k. All service pinion gears are stam ped with a code num ber on the threaded end of the pinion. The num erical difference between the code num ber and the gauge reading obtained in Step i determines the required thickness of the pinion locating shim. EX A M PLE: Pinion Code N u m b er................................... 45 D ial Indicator R e a d in g ............................... 16 D ifference........................................................ 29 Proper Shim T h ic k n e ss................................... 029”
Fig. 13A --lnstalled V ie w of Pinion Depth Gauge
Light-duty axle-position gauge plate with lower surface (x stam ped near low side) tow ard top of carrier. Heavy-duty axle-position gauge plate with higher sur face tow ard top of carrier. Insert clam p screw through gauge plate and both of the pinion bearings. e. Position J-6266-25 on threaded end of clam p screw and index it in front bearing, install hex nut and rotate bearings several times to m ake sure th at they are seated. 8. Continue with the following steps for both passenger and truck. f. Tighten hex nut until 20 in lbs. of torque is required to rotate bearings (fig. 14A). g. A fter torque has been established check position of gauge plate in carrier (See Steps b and c). h. Position dial indicator (Tool J-8001-3) on gauge post of Tool J- 6266-28 so th at indicator button rests on top of tool plunger.
NOTE: Shims are available in .001" increments from .021" to .037". Each shim has the thickness etched on flat surface for easy identification.
d.
Fig. 14 A -M e a su rin g Drive Pinion Bearing Rotating Torque
9. 10. 11.
Remove Tool J-6266 and pinion bearing cone and roller assemblies from carrier. Position shim selected in above procedure on pinion shaft and against pinion head. Install new cone and roller assembly, using Tool J-5590 for lightduty axle (fig. 16A) or Tool J-9772 for heavyduty axle (fig. 17A). Press cone against shim and rear face of pinion.
Fig. 15 A -M e a su rin g Drive Pinion Shim Requirem ent
CHEVROLET OVERHAUL MANUAL
