Figure 159
38357
Figure 160
Figure 161
Take apart the automatic adjustment units.
Carefully clean all the single parts forming the braking
assemblies. Check the state of wear of the adjustment bushing
teeth (2 and 3), seeing they (2) slide properly when screwing
onto the adjustment pins (1).
Check the state of the springs (4) and thrust pins (5).
Check the seats of the thrust pins (5) on the brake body;
replace the brake body if you find any scoring, dents or too
much wear.
35711
For Rockwell type brakes
Disassemble the automatic adjustment unit.
Unscrew the adjustment bushes (3) from the adjustment pins
(2) and then remove the seals (1).
Check the wear condition of the adjustment bush outer helical
toothing and check whether bushes are sliding freely on the
relevant adjustment pins when screwing.
Figure 162
38360
Check the condition of the pressure pin teeth (3), of the
relevant compression springs (2) and of the copper washers
(1).
Take seal (1) off thrust pin (2). Check wear conditions for
thrust pin (2) and surfaces of sloping planes (3) subjected to
the operation of shoe opening drive rollers.
71786
S
TRALIS
AT/AD
118
AIR SYSTEM - BRAKES
Base - January 2003