Friction Disc Replacement - Danfoss Airflex DBBS Installation, Operation And Maintenance Manual

Brake assemblies

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Table Of Contents

Table of Contents

DBBS Brakes

not have the slot then they are solid wear spacers

and the DBBS must be disassembled per 4.2.2 in

order to make adjustments.

Caution

Be sure to follow 4.2.3.4 instructions complete to

prevent damage to the brake components

4.2.3.1

Disconnect the air supply lines from the brake. Wipe

down the brake and match mark all components

from the mounting ﬂange (2) to the cylinder (19)

prior to disassembly. Match marking all components

will ensure that the components are reinstalled in

the orientation and location from which they were

removed.

4.2.3.2

Wear adjustment can be conducted without full

disassembly of the Multi-disc DBBS brake. The wear

adjustment spacers are slotted to allow for easy

removal with a chisel. See Figure 11.

4.2.3.3

Wear spacers shall be removed in complete sets only

(one from each stud location). Mark the spacers to be

removed to avoid confusion during removal.

Warning

Removal of spacers in quantities other than complete

sets (layers) will result in severe damage to DBBS

components during reassembly and could cause the

brake to not function properly.

4.2.3.4

Loosen the locknuts (18) one at a time and in an

alternating (crosswise) pattern to prevent binding

of the cylinder on the studs. Continue to loosen

the locknuts until the force of the release springs is

relieved, allowing for access to the wear spacers. It

may be necessary to push the reaction plate(s) away

from the mounting ﬂange so that the release springs

can be moved to gain access to the wear spacers.

Caution

The locknuts (18) must be loosened gradually to

prevent damage to the brake components.

Caution

Remove discs as needed so that they do not fall o

the gear during maintenance.

4.2.3.5

Using a narrow chisel wedged into the slot in the

wear spacer, pry the wear spacer until it fractures

and is clear to be removed from the stud. Repeat

for the remaining spacers in the set that is to be

removed (one spacer from each stud position).

See Fig 11.

Removing Split Wear Spacers with Chisel

Warning

Be sure to collect all wear spacers when removed.

Spacers lodging in between brake components

could prevent the brake from properly engaging or

releasing.

4.2.3.6

While supporting the weight of the cylinder/piston

assembly, tighten the locknuts (18) ONE TURN AT

A TIME and in a crosswise pattern until the cylinder

is seated ﬁrmly against the clamp tubes. Torque the

locknuts to the appropriate value. See Table 4.

Caution

The locknuts (18) must be tightened gradually and

evenly to prevent damage to the brake components.

4.2.3. 7 Restore any piping or covers removed prior to

operating the brake.

4.3