Vehicles after change point in 1982 REPLACING DIFFERENTIAL GEARS - Differential Removed - Remove differential - see "Replacing Shaft Seal for Drive Flange" - 33 11 011. Press off pulse spider. Installation: Press on pulse spider with Special Tool 33 1 304.  33 11 011
|  |
Take off ring gear (cold). Installation: Clean threads thoroughly (tapper). Heat ring gear to max. 100°C (212°F) and check temperature with a thermochrome pencil. Install ring gear with two locally manufactured staybolts as guides. |  |
Install new bolts with Loctite No. 270 and tighten in order of 1 through 10. Tightening torque*. Tighten bolts to torque angle*. * See Specifications
|  |
Drive out key through bore (1). Press out differential shaft (2). |  |
Turn out differential bevel gears with drive flange. Remove differential side gears with diaphragm springs and shims. |  |
Install both differential side gears with diaphragm springs (1) and shims (2). Curved surface of diaphragm springs (1) faces dirfferential case. Center differential side gears with drive flange. |  |
Insert Special Tool 33 1 306 on one side. Screw in Special Tool 33 1 441 with Special Tool 33 1 430. Tighten special tool bolt to spread differential side gears so far apart, that the drive flange can jus barely be turned. |  |
Install differential bevel gears exactly opposite each other. Move differential gears to installed position by turning drive flange. Remove special tools. |  |
Drive in differential shaft. Measuring Pre-load of Diaphragm Springs: Install Special Tool 33 1 441 and spindle 33 1 431. Tighten bolt by hand. |  |
Mount dial gauge with holder, consisting of Special Tools 33 1 420, 00 2 505 and 00 2 506, on differential case. Set dial gauge on stopped shaft gear to zero with pre-load. |  |
Tighten spindle that diaphragm springs are pressed flat. Read dial gauge. Loosen spindle. Turn shaft gear and repeat test at several points. A play of 0.03 to 0.1 mm (0.0012 to 0.0039´´) is required to prevent pressing diaphragm springs flat. The lower value would be ideal. Repeat test on opposite shaft gear. |  |
Excessive Play: Install thicker shim. Insufficient Play: Install thinner shim. Shims (2) are available in thickness steps of 0.05 mm (0.0020´´). Apply same procedures for opposite side. |  |
Install shims (2) of determined thickness and diaphragm springs (1). Inside curved surfaces of diaphragm springs (1) face differential case. | |
Note: If only the differential case bearings are being replaced, the friction torque of bearings can be measured with the ring gear removed (see 33 12 551) and it is not necessary to remove the drive pinion. 33 12 551
|
