Disassembly and assembly of the multi-disc brake B1
6b - Outer brake support B1; 6c - Piston; 6d - Piston return disc spring; 6f - Disc spring of the disc block; 6g - Gear Block; 6e, 6h - Retaining rings; 073 - Puller; A - Brake oil channel B1
Section of the Brake B1
6b - Outer brake support B1; 6c - Piston; 6f - Disc spring; 6h - Retaining ring; 69 - Friction discs; 70a - Outer disc thickness 1.8 mm; 70b - Outer disc thickness 3.5 mm/new disc 2.8 mm; 70c - Outer disc thickness 4.0 mm; "L" - Gap
Disassembly
1. Remove the retaining ring (6h).
2. Remove the disc block (6g) and disc spring (6f) from the outer support.
3. Place the puller (073) on the disc spring (6d) and compress it until the groove for the snap ring is released.
4. Remove the retaining ring (6e).
5. Remove the piston (6c) from the outer support, carefully feeding air into hole A.
Assembly
1. Install the piston (6c) on the outer support.
2. Install the disc spring (6d).
3. Place the puller (073) on the disc spring (6d) and compress it until the retaining ring (6e) is positioned in the groove.
4. Insert the retaining ring (6e).
5. Insert the disc spring (6f) and disc block (6g) onto the outer support and measure the clearance L. Insert the brake discs B1 together in the order shown in the accompanying illustration and install them one by one.
6. Install the press (078) on the outer disk (70c).
7. Compress the disc block until it stops (until the marker ring is visible) (small arrow).
8. Measure the clearance "L" between the retaining ring (6h) and the outer disc (70c) at three points. The clearance values in the B1 multi-disc brake are given in Table 1.
9. Adjust the clearance with the locking ring (6h) if necessary.
Retaining ring thickness: 2.6, 2.9, 3.2, 3.5, 3.8 and 4.1 mm.
10. Install the retaining ring (6h).