Dismantling, assembling and measuring clutch K1 - RA27037220680X(27-680)
Operation number of the operation texts and work units or standard texts and flat rates:
27-4185
| Snap ring (11) | Remove, install using a screwdriver (item 1). |
| Discs (6, 7, 8 and 10) and dished washer (15) | Remove and install in outside disc carrier (1) complete. Determine sequence from transmission diagram. Position convex surface of dished washer on plunger (item 2). Check and adjust clearance "A", 0.7 - 1.3 mm (item 9). |
| Snap ring (5) | Remove, install. To do this, compress spring seat (4) in assembly device 126 589 00 43 00 until snap ring is accessible (items 3 and 4). |
| Spring seat (4) and compression springs (3) | Remove, note number of springs (item 5). |
| Plunger (2) | Pull out. When installing, insert plunger using inserters, inside 126 589 02 14 00, outside 126 589 10 14 00. Check lip sealing rings (12 and 13) and renew if necessary, and install with sealing lips downwards (items 6 and 7). |
| O-Ring (17) | Check for leaks using kerosene or benzine (item 8). |
| Plunger guide ring (18) | Remove and install after removing snap ring (16). |
Special tools
Sequence of clutch discs
Transmission 722.343
Transmission 722.341 722.358
722.342 722.359
722.344 722.361
722.351 722.363
722.352 722.367
722.355 722.368
722.357 722.369
Transmission 722.350 722.364
722.353 722.365
722.354 722.366
722.356 722.370
722.362 722.371
| Designation | Item No. | Thickness in mm |
| Inside disc | 6 | 2,1 |
| 7 | 2,0 | |
| 8 option for compensating play | 3,5 or 4,0 | |
| 10 option for compensating play | 4,5 or 5,0 | |
| Plunger | 2 | - |
| Snap ring | 11 | 2,0 |
| 2,5 | ||
| 3,0 | ||
| Dished washer | 15 | - |
| Transmission | Number | Wire dia. in mm | Uncompressed length approx. mm |
|---|---|---|---|
| 722.3 | 27 | 0,9 | 38,5 |
| Play "A" of multiple-disc clutch in mm (see diagram) Discs compressed with 10 N |
0,7-1,3 |
Dismantling and assembling
- Remove snap ring (11).
Installation note
After inserting, press snap ring upwards using a screwdriver applied around its entire circumference.
- Tilt outside disc carrier (1) and remove discs. Check inside discs for scorching and wear (reference thickness 2 mm).
Installation note
Note sequence of clutch discs. Arrange discs according to transmission diagram and immerse in ATF for approx. 1 hour before installing. Position convex surface of dished washer on plunger.
- Attach assembly device (020) on dished washer (4) and compress until snap ring (5) is accessible. Remove snap ring (5).
- Release assembly device 126 589 00 43 00 and lift off.
Installation note
Check that snap ring is correctly seated after inserting.
- Remove spring seat (4) and compression springs (3).
Installation note
Note number of compression springs and ensure that each spring is centered by one guide lug on the spring seat.
- Pull plunger (2) out of outside disc carrier (1).
Installation note
Check lip sealing rings (12) and (13) for wear and damage, and renew if necessary.
Insert lip sealing rings (12 and 13) into plunger so that the sealing lips point downwards (in direction of arrow).
Place inserters (021, 022) onto outside disc carrier (1).
- Lubricate inserters and sealing rings with ATF and carefully insert plunger (2). Press into outside disc carrier (1) without tilting i
- Check O-ring (17) between outer multiple-disc carrier (1) and plunger guide ring (18) for leaks by filling plunger guide ring with a little kerosene or benzine. In the event of leaks, press out snap ring (16), remove plunger guide ring and replace sealing ring (17).
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Measuring
- Determine clearance "A" using a feeler gauge.
Adjust clearance "A" using the snap ring (11) available in three thickness (2.0, 2.5, 3.0 mm). For this reason, the groove for the snap ring is machined 3.2 mm wide. Only if the prescribed clearance "A" is not achieved using the snap ring (11) must the middle outside discs be used for correction. Adjust the clearance to 0.7 - 1.3 mm).