REAR AXLE AND REAR SUSPENSION 4 4 V X 3 While firmly holding the pinion with a rag to form a ak friction brake turn the ring gear back and forth i i l 1 ipe with a wrench fig 11 on the ring gear mounting gL ui i EVL Tasse bolts until a definite contact pattern is formed A Q 4 Inspect the contact pattern produced and analyze the it pztdcc V Vipl results relative to the following data Figure 12 i Q T E A F provides gear tooth nomenclature and Figure 13 T 5 illustrates the various contact patterns which may J i u be experienced Y The large end of the tooth is called the heel and the small end the toe Also the top of the tooth at V V which is the part above the pitch line is called the i face while the part below the pitch line is called V q v I the rl mk The space between adjacent meshing teeth is referred to as back1ash l V Q i T 3 V T eir Figure 13 shows correct and incorrect contact A I 5 patterns For illustrative purposes coast side T ie V iV of gear contact is shown Drive and coast side of 4 t i gear teeth will have identical contact patterns ii F i Tooth pattern A is ideal for quietness and long life If the pattern shows a toe contact B H9 9 Ti9i T i 9 Piiliml B i 9 Adivstine Sleeve it indicates not enough backlash To correct move the ring gear away from the pinion by loosening torque from Our Xamp1 the final total turning right hand differential adjusting nut and tightening torque measured at the pinion would be 12 14 in lbs 1 ft h2md adlwtmg nut with used bearings or 1 7 19 in lbs with new NOTE Make adjustment One notch at a time b 2 YmgS V repeat check with red lead and continue adjust 7 Install pinion adjusting sleeve locking tab ment until tooth Contact appears as in A Backlash must remain within limits Ri 9 G d Pi i C P If the pattern shows a heel contact No it inci Upon completion of the ring gear to pinion backlash S l g L ch1O2 1 hg13k iff 2 1i O d3 1Sfor adjustment a check of the gear teeth contact pattern ut d t ht ht h ds d t tt J S ing should be made to ensure gear life and minimize bearing H an lg en rig an a Jus mg ml O move ru g gear toward pinion Backlash must remain within noise from the carrier limits 1 Thoroughly clean the ring gear and pinion teeth with solvent and air dry 2 Paint ring gear teeth only with a light and even coating of a mixture of iron oxide gear marking compound of a suitable consistency to produce a contact pattern on the ring gear rV i o Ex it V i i L it l S r F Ji ii i 1 ub V up P A u u Iili u we e r V r it lei F E ii I E Q Vr c iloi r eii r r i lroi as iioi R T i ji it iiri rii cr i is 5 T 1 i ii iii t i V V ito i F V iilitiii i i i l r V 2 r ee V i cf 2 ty e r e lrri i eie ii ii F 6 r ic o ie V T J J sii 33 Fig TO Measuring Pinion Turning Torque F g D Ve Op ng jeuyucy puyjem CORVAIR SHOP MANUAL SUPPLEMENT