Contents: Disassembly ↡ Assembly ↡
14a - Outer brake support B2 or piston B3; 14b-d - Brake sealing rings B3; 27 - Brake piston B2; 28 - Piston guide ring; 28a-b - Sealing rings on the piston guide ring; 29, 134b - Disc springs; 30 - Spring plate; 31, 134a - Retaining rings; 32 - Brake piston guide B2 and B3; 32a - Sealing ring; 134 - Disk block
Disassembly and assembly of the B2 multi-disc brake
31 — Retaining ring
074 — Puller
Disassembly and assembly of the B2 multi-disc brake
27 — Piston
28 — Piston guide ring
137 — Valve
Disassembly and assembly of the B2 multi-disc brake
A - Oil channel of piston B3
B — Oil channel of piston B2 from the back side
C — Clutch oil channel K3
D — Oil channel of piston B2 on the gearshift side
Assembly of piston guide and outer support of multi-disc brake B2
2 — Transmission housing
14a — Outer support of brake B2, (piston B3)
32 — Piston guide
Section of the Brake B1
14a - Outer brake support B2; 27 - Piston B2; 134a - Outer disk (6.5 mm thick); 134b - Outer disk (1.8 mm thick); 134c - Outer disk (1.8 mm thick); 134d - Friction discs; 134e - Disc spring; 144a - Retaining ring; L - Gap
Article borrowed from the web portal MERCEDESMAN
Disassembly
1. Remove retaining ring 134a.
2. Remove the brake disc block B2 134 and the disc spring 134b from the outer support of the brake B2.
3. Install puller 074 on disc spring 29 and compress it until the groove for the retaining ring is released.
4. Remove retaining ring 31.
5. Remove spring plate 30 and disc spring 29.
6. Disconnect the piston guide ring 28 and the brake piston B2 27 from the piston B3 14a by supplying compressed air to hole D.
7. Press guide ring 28 off piston B2 27.
8. Remove guide 32 from piston B3 14a by supplying compressed air to hole A.
Assembly
1. Set the guide 32 and piston B3 14a in the correct position. To do this, insert the guide 32 into the transmission housing 2 and tighten. Press the outer brake support B2 14a until it stops in the guide 32. The groove on the splines or the cutout on the outer brake support B2 14a should be directed downwards (arrow).
2. Insert the B2 brake piston 27 into the B3 brake piston 14a. The rounded ends of the sealing rings 14c, 28a and 28b must face outward. The rounded end of the sealing ring 14d must face inward.
3. Insert piston guide ring 28. Valve 137 in the piston guide ring must be on top.
4. Insert disc spring 29 and spring plate 30.
5. Install puller 074 on disc spring 29 and compress it until the groove for the retaining ring is released.
6. Insert retaining ring 31.
7. Insert disc spring 134b and disc block 134 onto the outer brake support B2.
8. Install the brake discs BZ together in the order shown in Illustration 109 and insert them one by one.
9. Install press 078 on outer disk 70c.
10. Compress the disc block with a press until the stop until the marking ring is visible (small arrow).
11. Measure the clearance L at three points between the retaining ring 144a and the outer disc 134a. The clearance values in the multi-disc brake 82 are given in the table.
12. Adjust the clearance with the 144a retaining ring if necessary. Retaining ring thickness: 2.9, 3.2, 3.5, 3.8 and 4.1 mm.
13. Install retaining ring 134a.