Allied H12E, Service Manual, Page: 92 / 121

Section 4
4 - 17
1. Remove the four socket head screws (item 23). A
suitable holding fi xture is useful to keep brake in position.
2. Tap female end of spline shaft assembly (item 6) and
spring plate (item 14) with a soft mallet to separate
cover. If sections will not separate, use a screwdriver
to carefully pry sections apart.
3. Remove retaining ring (item 1) from spline shaft
assembly (item 6).
4. Remove spline shaft assembly (item 6) from cover
plate (item 5) by tapping male end of spline shaft
assembly with soft mallet.
5. Remove retaining ring (item 2) from cover plate (item
5) and press out oil seal (item 4) and bearing (item
3).
6. Remove four socket head shoulder bolts (item 7). A
suitable holding fi xture is useful to hold the brake in
position.
Do not remove shoulder bolts without
pressurizing brake to approximately 300
psi, or damage may result.
7. Remove primary disc (item 8), rotor discs (item 9)
and stator discs (item 10).
NOTE:
1. Primary disc is positioned by shoulder bolts
(item 7) and stator discs are positioned on dowel
pins (item 13).
2. The minimum stack height of discs item 9 and
item 10 is 1.173”.
8. Release pressure to brake before removing four
socket head capscrews (item 12).
9. Remove spring plate (item 14).
10. Remove case gasket (item 11) from spring plate
(item 14).
11. Before removing springs (item 15), record the pattern
and color for reassembly purposes.
12. Remove piston (item 16) by carefully applying
hydraulic pressure to the brake release port in the
pressure plate (item 22).
13. Remove O-rings (items 18 & 20) and back-up rings
(items 17 & 19) from piston (item 16).
NOTICE
Be careful not to scratch or mar piston.
14. Remove case gasket (item 11) from pressure plate
(item 22)