8
Installation and Maintenance Manual, Compact CA
3.1.9 Mounting MDA 5, 7 & 10
3.1.10 Draining of Brake cylinder
305
3xx
43
30
314
315
313
5
Fig. 3.21
The brake is normally mounted on the motor
at the factory. If the brake is disassembled and
shall be mounted on a motor, it must be done
according to following.
1. Control that seal and Seal retainer (5) is
mounted according to Fig. 3.1.
. Mount Disc center (30) on the cylinderblock.
Oil the screws (43) and assemble with torque
136 Nm (100 lbf
.
ft).
3. Put the Brake housing (305) on the motor,
and mount the right spacer (3xx). Oil the
screws and mount them with tightening
torque 136 Nm (100 lbf
.
ft). See table 3.10.
4. Mount first one outerdisc. Then mount inner
disc, outerdisc until all discs are mounted.
5. Grease the seals with Texaco Multifak EP or
an equivalent grease without solid additives
and mount the piston (313).
6. Grease the springs (315) with Texaco Multifak
EP or an equivalent grease without solid
additives. Put the springs on the Brakecover
(314). The springs shall be mounted against
each other on the inner diameter.
7. Mount the Brake cover (314) on the brake. Oil
the screws and assemble the screws. Start
mounting by slightly tightening the screws,
no more than 1 turn each. Continue with
one turn of each screw around the cover.
Tightening torque is 114 Nm (84 lbf·ft).
The Diagram 3.1 below shows the falling
braking torque M
max
for increasing pressure in
the brake cylinder drain.
Example: MDA 10 has a braking torque of
39500 Nm / 9100 lbf
.
ft, when the brake is not
under pressure and
µ
= 0,1.
Assume that the pressure in brake cylinder
drain is 1,5 bar / 1,75 psi. The diagram shows
that the actual brake torque (M
act
) corresponds
to only 90% of M
max
.
Motors with SPECIAL
brakes may have different
working operation. Please
make sure that you check
the
Ordering code
on
your brake.
Table 3.10
Diagram 3.1
Installation
Back pressure in brake cylinder drainage line.
MDA5 has 6 outerdiscs and 5 innerdiscs.
MDA7 has 8 outerdiscs and 7 innerdiscs.
MDA10 has 11 outerdiscs and 10 innerdiscs.
% Br
aking torque
Brake
Screws (ISO 89811)
Spacer
MDA 5
MC6S 1x50 1.9
t=54 (,13)
MDA 7
MC6S 1x50 1.9
t=4,4 (1,67)
MDA 10
MC6S 1x50 1.9
t=5 (0,98)
