B2

HOLDING CLUTCH B2

DISASSEMBLY





1. Remove snap ring (1) (Fig. 173).
2. Take multiple disc pack B2 (2) and disc spring (3) out of the outer multiple disc carrier B2 (8). The outer multiple disc carrier for the multi disc holding clutch B2 is the piston for the multiple disc holding clutch B3 at the same time. Note which clutch disc is removed just prior to the disc spring (3) for re assembly. If the clutch discs are re used, this disc must be returned to its original position on top of the disc spring.
3. Place the Multi use Spring Compressor 8900 on the spring disc (14) and compress the spring until the groove for the snap ring is exposed.
4. Remove snap ring (16) (Fig. 173).
5. Remove spring plate (15) and disc spring (14).





6. Separate piston guide ring (13) and the B2 piston (10) from the B3 piston (8) by blowing compressed air into the bore (D) (Fig. 174).
7. Press piston guide ring (13) out of the B2 piston (10).
8. Separate piston guide (4) from the B3 piston (8) by blowing compressed air into the bore (A) (Fig. 174).

ASSEMBLY





1. Check all sealing rings (2 4, 6) (Fig. 175), replace if necessary. The rounded off edges on the sealing rings (2, 4, 6) must point outwards.





2. Assemble piston guide (4) (Fig. 176) and B3 piston (8) in the correct position. Verify that the missing tooth in the B3 piston/B2 outer disc carrier (8) is aligned with the centerline of the two threaded holes in the B2 and B3 piston guide (4).
3. Insert B2 piston (10) (Fig. 176) in B3 piston (8).





4. Insert piston guide ring (2) (Fig. 177). The valve (1) in the piston guide ring must be on top.
5. Insert disc spring (14) (Fig. 176) and spring plate (15). Insert disc spring with the curvature towards the spring plate
6. Place Multi use Spring Compressor 8900 on the disc spring (14) and compress the spring until the groove for the snap ring is exposed.
7. Insert snap ring (16).

NOTE: Pay attention to sequence of discs. If the original clutch discs are reused, be sure to return the disc identified on disassembly as belonging on top of the disc spring (3) to its original location. Place new friction multiple discs in ATE fluid for one hour before installing.

8. Insert disc spring (3) and multiple disc pack (2) in the B2 outer multiple disc carrier.
9. Insert snap ring (1).

NOTE: During the measurement the snap ring (8) must contact the upper bearing surface of the groove in the outer multiple disc carrier.





10. Measure the B2 clutch pack clearance by mounting the Pressing Tool 8901 (1) (Fig. 178) on outer multiple disc.
11. Using a lever press, compress the pressing tool as far as the stop (then the marking ring is still visible, see small arrow).





12. Using a feeler gauge, determine the play "L" (Fig. 179) at three points between the snap ring (8) and outer multiple disc (7).
13. The correct clutch clearance is 1.9 - 2.3 mm (0.075 - 0.091 inch) for the four friction disc versions and 2.0 - 2.4 mm (0.079 - 0.095 inch) for the five disc versions.
14. Adjust with snap ring (8), if necessary. Snap rings are available in thicknesses of 2.9 mm (0.114 inch), 3.2 mm (0.126 inch), 3.5 mm (0.138 inch), 3.8 mm (0.150 inch), and 4.1 mm (0.162 inch).