21 52 502 - Clutch master cylinder - overhaul < 21 - Clutch < BMW 728 - 745i
 
OVERHAULING CLUTCH
MASTER CYLINDER
- REMOVED -

Clean master cylinder and inside parts with
alcohol.
Replace master cylinder if cylinder bore is
scored or corroded.
Install repair kit, consisting of:
1 Cap
2 Circlip
3 Grooved rings
4 Sealing plug
5 Washer
A = 140 ± 0.5 mm (5.512 ± 0.020´´)

 
From model '83
OVERHAULING CLUTCH MASTER CYLINDER
- REMOVED -

Clean master cylinder and inside parts with
alcohol.
Replace entire master cylinder, if cylinder bore
has scoring and/ or corrosion.
Install repair kit,
consisting of:
1 Cap
2 Circlip
3 Piston assy.
4 Plug
Distance A = 140 ± 0.5 mm (5.512 ± 0.020").
Coat cylinder bore and grooves lightly with
ATE brake cylinder paste*.

* Source: HWB

63021037 - click to zoom