3
Installation and Maintenance Manual, Compact CA
Disassembly and assembly of MDA 14 & 21
Installation
1. Start the disassembly by slightly
loosening the screws (40). Not more
than 1 turn each. Continue with 1 turn
of each screw around the cover until
the pre-load of the Belleville springs
(315)(Cup springs) is zero. After that the
screws can be removed and the Brake
cover (314) lifted off.
. The Brake piston (313) can be removed
by installing 3 screws (M8) and be lifted
off by using the screws.
3. Inner and outer discs (318, 30) can be
removed and the spacer (308) in place
can be removed.
4. Loosen the screws (43), and take off the
seal retainer (5).
5. Control the seal and mount seal retainer
(5) as figure. Oil the screws (43) and
assembly with torque 114 Nm (84
lbf·ft).
6. Mount spacer for MDA 14 (308). Mount
first one outerdisc, then innerdisc,
outerdisc until all discs are mounted.
N.B Matched disc set.
MDA 14 has 8 outerdiscs and 7 innerdiscs
MDA 1 has 11 outerdiscs and 10
innerdiscs
7. Grease the seals with Texaco Multifak
EP or an equivalent grease without
solid additives and mount the piston
(313).
Please read this in-
struction carefully
before starting the
disassembly!
8. Grease the springs (315) with Texaco Multifak
EP or an equivalent grease without solid
additives, put the springs on the Brake cover
(314). The springs shall be mounted against
each other in the innerdiameter.
9. Mount the Brake cover (314) on the brake, oil the
screws and assembly the screws. Start mounting
by slightly tightening the screws, no more than
one turn each. Continue with one turn of each
screw around the cover, tightening torque is 114
Nm (84 lbf·ft).
5
43
30
318
40
315
314
313
308
3.1.14 Control of braking torque
The motor can be used for controlling the torque for the brake.
Start to drain the brake to tank, and increase pressure for the motor until it starts to rotate. Pressure
drop over the motor x T
s
for the motor gives braking torque for the brake.
If the motor can not rotate the brake, increase back pressure in the brake cylinder until the motor
can rotate the brake.
Braking torque = Pressure drop over the motor x motor torque T
s
x 100/ % Braking torque in diagram
3.1 or 3.. With full torque and 10 rpm, the brake must not rotate more than max 10 sec.
