Alfa Romeo 33 owners manual page 169

text version of content this owner's manual page from owners manual to the vehicle Alfa Romeo 33, year of production 1983 - 1995:

GEARBOX scribed in paragraph “Differential Following fhe same procedure, reas- 3. With tool A.3.0287 remove Casing - Assembly”, fit crown gear semble the left hand differential inner races of taper roller bearings carrier. to differential casing. from the differential casing. 2. Fit differential casing back to IO. Fit oil sump with relevant sealing gasket. gearbox casing. Pinion Position the pinion into its seat in the gearboxdifferential casing and fit CROWN GEAR bearings and gears (refer to: Shafts AND PINION and Gears). DISASSEMBLY TESTING A.3.0287 1 1 Crown gear Verify back-lash between crown gear and pinion in four diametrically carriers opposite positions. Irregularback- 1. Remove differential lash, with excessive differences be- from the gearbox-differential casing tween the measured points, is an (refer to: Differential’ Carriers - Disassembly). indication of crown gear deformation with consequent flatness error 2. Remove differential casing from between gearbox casing/crown gear the gearboxdifferential casing (refer place and differential casing plane. to: Differential casing- Disassembly). Make sure the differential works 3. Loosen and remove the screws properly and is completely noiseless. securing the crown gear to the Incorrect assembly of’crown gear and differential casing and then remove the crown gear. pinion or worn taper roller bearings could be the cause of the trouble. Pinion 1. Remove gears from pinion shaft 4. Loosen and remove the screws and then withdraw the shaft from its DIFFERENTIALand washers securing the crown gear seat in the gearbox-differential cas- CASING to the differential casing. ing, with relevant bearings (refer to:Now remove the crown gear. Shafts and Gears). DISASSEMBLY 1. Remove left and right hand CHECKS AND INSPECTIONS differential carriers (refer to: Dif- Having thoroughly washed all parts, CHECKS AND INSPECTIONS proceed as follows: ferential Carriers - Disassembly). 2. Remove differential casing from Having thoroughly washed all parts, 1. Slowly rotate bearings checking gearbox-casing, checking them for vibrations, noise or sticking. perform the following operations: 2. Check surface of all rotating parts and of roiling tracks for scores 1. Slowly rotate bearings checking them for vibrations, noise or sticking. or any evidence of abnormal wear, 2. Check the surface of all rotating pitting or overheating; in the affir- parts and of all rolling tracks for mative, replace the parts involved. scores and any evidence of abnormal 3. Make sure that contact pattern of bevel pinion teeth extends to their wear, pitting or overheating; in the entire working surface. If any of the affirmative,replace the parts in- volved. teeth are nicked, replace the pinion 3. Visually check gears, both plane- and make sure the crown gear has not been damaged as a consequence. tary and side gears, making sure that there are no scores or evidence of Check both toothings for scores and any evidence of pitting or excess pitting, that contact pattern extends wear. to their entire working surface and further that mating is noiseless and ASSEMBLY smooth. If necessary, replace the whole 1 Differential3 Crown gear Crown gear casing 4 Taper roller differential casing; in this case also replace taper roller bearings. 2 Retaining screwbearing 1. Following the procedure de- May 1983 13-22

owners manual Alfa Romeo 33

owners manual Alfa Romeo 33 - year of production: 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995 - Alfa Romeo 33 owners manual EN