Disassembly
Design 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 - Block of gears; 6e, 6h - Retaining rings; 073 - Puller; A - Brake oil channel B1
1. Remove retaining ring (6h).
2. Remove the drive unit (6g) and disc spring (6f) from an external support.
3. Install the puller (073) on disc spring (6d) and squeeze it until the groove for the retaining ring is free.
4. Remove retaining ring (6e).
5. Remove the piston (6c) from the outer support, gently blowing air into the hole (A).
Assembly
1. Install the piston (6c) to the outer support.
2. Install disc spring (6d).
3. Install the puller (073) on disc spring (6d) and compress it until the circlip 6e is seated in the groove.
4. Insert retaining ring (6e).
Cross section of brake B1
6b - Outer brake support B1; 6c - Piston; 6f - Disc spring; 6h - Retaining ring; 69 - Friction discs; 70a - Outer disc 1.8 mm thick; 70b - 3.5mm outer disc/new 2.8mm disc; 70c - Outer disc 4.0 mm thick; L - Clearance
1. Insert disc spring (6f) and disk block (96g) on the outer support and measure clearance B1. Insert brake discs B1 together in the order shown in the illustration and install them one by one.
2. Install the press (078) to an external drive (70c).
3. Squeeze the disc stack until it stops (until the marking ring appears - a small arrow).
4. Measure the clearance «L» between snap ring (6h) and outer disc (70c) at three points. The gaps in the multi-disc brake B1 are shown in the table below.
If necessary, adjust the clearance by adjusting the retaining ring (6h) required thickness. Retaining rings are available in thicknesses of 2.6, 2.9, 3.2, 3.5, 3.8 and 4.1 mm.
Install the matched ring.
Clearances in multi-disc brake B1
Disk | Gap size, mm | |
4 | 1.90 | 2.30 |
5 | 2.00 | 2.40 |