Rear axle | 741.91, 742.80, 743.0/2 in model 368, 382, 384 |
Rear axle | 741.93, 743.0/1/3 in model 384, 386, 693 |
Rear axle | 741.93, 743.1 in model 386, 958 |
Rear axle | 743.4 in model 688, 979 |
Rear axle | 745.5/9, 746.86/87/888/889/97/980/982/990/991 |
Rear axle | 745.5/9, 746.86 |
Rear axle | 745.9, 746.86/880/97/980/982/991 |
Rear axle | 746.983/994/995/997 |
1 | Dial indicator |
2 | Square spike |
3 | Adjustment device |
B35.31-0054-01
B35.31-0032-01
1 | Tighten the threaded rings | Rotate until the bearings do not show slack or preload. | |
The crown should still rotate with little clearance between the teeth. | |||
Square drift | |||
2 | Firmly tighten the threaded rings and at the same time turn the sprocket | With a suitable tool, apply a few firm strokes on the bearing shells and to the side of the sprocket. | |
3 | Loosen the threaded rings and, next, screw them on again until they touch gently | At this position, the rings should be snugly fit and show no preload. | |
4 | Secure the bracket with the dial indicator (1) with magnetic to the differential assembly housing | Guide the comparator feeler (1) over the pressure flank of one of the sprocket teeth. | |
Dial gage | |||
Dial indicator holder | |||
5 | Measure the clearance between the teeth of the sprocket and pinion set | Measure at four lag points of 90° between each other and determine the point of smallest clearance. | |
6 | Axially shift the sprocket with differential until the required minimum clearance is obtained | In the smallest clearance position. | |
Loosen a threaded ring and tighten the other one to the same extent, so as to prevent changing the bearing settings. | |||
.Clearance between ring gear/pinion | |||
7 | Remove the dial indicator holder and the dial indicator (1) and then tighten the bearing cap screws opposite from the sprocket teeth | Rear axle 743.0/2/3. 746.98Bolts attaching the bearing caps | |
Rear axle 741.91/93/93, 742.80, 745.95/98, 746.86/87/97Mounting bolt of the bearing cover | |||
8 | Secure the adjusting device on the bearing cap already tightened, with the flag parallel to the crown | Measurement stop | |
9 | Secure the holder containing the magnetic block and the dial indicator by supporting the probe at a right angle on the flag, set to zero and pre-loaded with 1 mm | Dial indicator holder | |
Dial gage | |||
10 | Rotate the crown continuously while tightening the threaded ring from the crown teeth side, until obtaining the initial preload on the dial indicator | For used bearings, try to maintain the lower limit; for new bearings, maintain the upper limit. | |
.Preload of the satellite box bearings | |||
Square drift | |||
11 | Tighten the screws on the bearing cap on the crown teeth side | Rear axle 743.0/2/3. 746.98Bolts attaching the bearing caps | |
Rear axle 741.91/93/93, 742.80, 745.95/98, 746.86/87/97Mounting bolt of the bearing cover | |||
12 | Turn the crown and check the final preload | .Preload of the satellite box bearings | |
13 | Check the clrearance between the teeth of the crown & pinion set | If the clearance is not within the prescribed values, repeat the adjustment process. | |
.Clearance between ring gear/pinion | |||
14 | Adjust the pressure screw so that, after the counter-locknut is tightened, the dial indicator shows the bearing cap displaced from 0.010 to 0.025 mm | ||
15 | Check the contact marks of the crown teeth |
| |
Prussian blue, paint |
Differential |
Number | Designation | Rear axle 741.9, 742.8, 743.0, 743.1, 743.2, 743.3, 745.5, 745.9, 746.5, 746.8, 746.97, 746.980, 746.982, 746.983, 746.990/991/994/, 746.995/997 | Rear axle 743.4 | ||
BE35.30-B-1001-03A | Preload of the satellite box bearings | Before tightening the screws of the bearing lid | mm | 0,030...0,050 | 0,005...0,020 |
After tightening the screws of the bearing lid | mm | 0,040...0,070 | 0,020...0,040 |
001 589 53 21 00
Dial gage
363 589 02 21 00
Dial indicator holder
312 589 04 07 00
Square drift
354 589 00 21 00
Measurement stop