Assembly - Husqvarna 50 Workshop Manual

Turn the cover over and press out the brake bank
retaining pin with a punch.
Check the brake band for wear. Measure the thickness
of the band. The original thickness of the brake band is
0.80 mm (0.031 in.). The brake band must be exchanged
if the band is worn anywhere along its length to 0.65 mm
(0.026 in.) or less.
If the brake band needs to be exchanged, separate the
band from the linkage by removing the screw.

Assembly

Check all chain brake parts for wear or damage and
replace with new parts if necessary. Lubricate the linkage
and pivots with thin oil.