ra35001070530x

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

Type ra · topic 35.30 · version 9010 · 1990-03-04

Applies to:

Where it sits

Function group 2 Chassis › 35 Rear axle › 35.30 Final drive, drive shafts — Series 126 (models 020, 024, 025, 034, 035, 036, 037, 038, 039, 045, 046, 134, 135)

35-530 Replacement of radial sealing ring on drive pinion
(rear axle center piece installed)

Operation no. of the operation texts and work units
and standard texts and flat rates 35-0130

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

Rear axle oil

drain and fill up to oil fill hole (see Specifications for Service Products page 235 and 235.3).

Rubber rings on exhaust system (120-122a)

unhook on center and rear mufflers, hook on. Support exhaust system on rear muffler (item 2).

Exhaust guard plate (108)

remove, install, 25 Nm (item 3).

Propeller shaft clamping nut (110b)

loosen, tighten, 30-40 Nm,
open-end wrench 46 mm 126 589 00 01 00,
torque wrench 001 589 66 21 00.

Propeller shaft intermediate bearing (110a)

screw off, screw on, 25 Nm (item 4).

Propeller shaft (110)

remove at joint flange (41), install, renew self-locking hex. nuts, M10 = 40 Nm, M12 = 60 Nm

(items 5 and 6).

Rear axle shafts (28) on connection flanges

remove, install and tie in place (items 7 and 8).

Friction moment at rear axle center piece

measure and note,
torque measuring unit 001 589 49 21 00, socket wrench socket 30 mm 126 589 02 09 00, connector 3/4"

100 589 02 59 00.

12-point collar nut (40)

loosen or tighten in increments until measured friction moment is achieved (item 10), retaining wrench

116 589 10 07 00, socket wrench socket 30 mm

126 589 02 09 00, torque wrench 001 589 74 21 00.

Joint flange (41)

remove, reinstall, pull with puller 116 589 19 33 00 if required (item 11).

Radial shaft seal (42)

press out of rear axle housing, press in, installation tool 124 589 02 15 00.

Thrust washer (43a)

renew if present (item 13).

Oil level

check, add oil if required.

Oil types and capacities

Standard differential

Hypoid gear oil SAE 90
see Specifications for Service Products page
No. 235

Limited slip differential with ASD (indicator plate on rear axle housing)

Special hypoid gear oil
see Specifications for Service Products page
No. 235.3

Capacity, center piece with ring gear dia. 210

1.3 liters

Capacity, center piece with ring gear dia. 185

1.0 liters

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126
0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126
0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126
0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126
0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

Special tools

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126
0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126
0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126
0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

Note
The work sequence for removal and installation of the radial shaft seal is identical for models 107 and 126.

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

Removal, installation

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1 Drain oil from rear axle, refill (arrows).

Installation note

Pay attention to oil types and capacities.

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

2 Unhook rubber rings on center and rear mufflers, hook in and support rear muffler with suitable belt.

Arrangement, model 126

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

3 Remove exhaust guard plate, install.

Installation note
Tightening torque for M8 hex. nuts and bolts:
25 Nm.

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

4 Loosen clamping nut, tighten and screw propeller shaft intermediate bearing off on frame floor, screw on.

Installation note
Clamping nut 30-40 Nm,
propeller shaft intermediate bearing 25 Nm.
Torque wrench 001 589 66 21 00,
open-end wrench 46 mm 126 589 00 01 00.

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

5 Remove propeller shaft on rear axle center piece, install.

Installation note
Renew self-locking hex. nuts.
Tightening torque M10 = 40 Nm; M12 = 60 Nm.

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

Note

On models 126.03/04 up to approx. beginning of 10/85 the three hex. head bolts for mounting the joint plate on the joint flange must be installed from the rear toward the front for reasons of space. The bolts can only be inserted when the joint flange is located at the same height as the point on the rear axle housing marked with an arrow.

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

Secure propeller shaft against falling with binding wire; for this purpose use two mounting screws of exhaust guard plate (arrows).

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

7 Screw rear axle shafts off at connection flanges, screw on and remove with retaining bolts (28m) and washers (28n), reinstall.

Assure that the screwdriver insert is completely inserted into the serrated or Allen profile when loosening the retaining bolts - clean bolt head if required.

Installation note

Renew self-locking retaining bolts. On retaining bolts with M10 thread oil contact surface and thread. Tightening torque M10 = 70 Nm; M12 = 125-145 Nm.

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

8 Press rear axle shafts together and fasten to rear springs with wire, unfasten.

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

9 Measure and note friction moment of rear axle center piece.
Torque measuring instrument 001 589 49 21 00 (040b), socket wrench socket 30 mm 126 589 02 09 00 (040a), connector 3/4" 100 589 02 59 00 (040c).

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

10 Attach holding wrench (040) to joint flange and screw out 12-point collar nut with socket wrench socket (040a), screw in.

Note
Do not disengage lock on 12-point collar nut with pinch collar lock, only break loose.

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

Installation note

Renew 12-point collar nut (40). Carefully tighten 12-point collar nut in increments until measured or noted friction moment is reached. The tightening torque for the 12-point collar nut must be at least 180 Nm. If this minimum tightening torque is not reached, renew resilient spacer sleeve.

Knock 12-point collar nut into one of two grooves in drive pinion with punch so that there is no space between the groove and retaining tab (arrow, cutout). Holding wrench 116 589 10 07 00, socket wrench socket 30 mm 126 589 02 09 00, torque wrench 001 589 74 21 00.

Do not hit hard in axial direction.

Dimensions for punch, cutout bottom left

"a"= approx. 8 mm

"b"= approx. 4 mm

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

11 Pull joint flange off of drive pinion, use puller (041) if required, remove and insert. Puller 116 589 19 33 00.

Installation note
Check running surface for radial shaft seal on joint flange. If running surface is worn, renew joint flange.

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

12 Press radial shaft seal (42) out of rear axle housing with suitable screwdriver.

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

Installation note

Drive radial shaft seal (42) into rear axle housing against stop with installation punch 124 589 02 15 00 (042).

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

13 Always replace thrust washer (43a) for prevention of load change knocking, if present.

Assure that none of the retaining lugs (arrows) on the thrust washer are broken off when pressing out the radial shaft seal; remove lug in center piece if required.

0530 - Replacement of the radial sealing ring on drive pinion (rear-axle center piece installed) Model 126

14 Fill rear axle housing with hypoid gear oil up to height of fill opening (see Specifications for Service Products 235 and 235.3).

15 Install in opposite order.

Referenced documents