Cylinder Seal Replacement - Danfoss Airflex DBBS Installation, Operation And Maintenance Manual

DBBS Brakes
Caution
Loctite #262 may irritate sensitive skin. Refer to the
product label for safety precautions.
Note
When replacing friction material, it is suggested that
discs (58) also be replaced to ensure good surface
contact.
4.3.11 Position a disc (58) on the mounting flange/friction
disc assembly. Center the disc on the friction
material.
4.3.12 On multiple disc units, install wear spacers (29),
clamp tubes (12), release springs (34), the reaction
plate, and remaining reaction springs over the studs.
Position the remaining disc (58) on the reaction plate/
friction disc assembly. Center the disc on the friction
material and align the disc splines with those on the
first disc.
Note
It is suggested that the Wear Spacers (29) be the
Split Wear Spacer type.
4.3.12.1 Wear Spacers (29) are installed in sets onto each
stud. The number of wear spacers must be equal on
each stud.
4.3.12.2 Clamp tubes (12) are installed onto each stud and
rest upon the wear spacers (29).
4.3.12.3 Release springs (34) are installed over the clamp
tubes (12) as outlined in Section 4.2.2.6
Caution
The position of the release springs can vary with
di erent brake sizes. If unsure of assembly position,
consult Danfoss Airflex Engineering. The springs on
either side of the reaction plate must be assembled
on the same stud, over the clamp tubes. Improper
assembly will result in cocking of the reaction plate
and uneven brake release. Refer to section 4.2 and
6.1 for wear spacer quantity.
4.3.13 Lubricate the threads on the ends of the studs with
30 wt. oil or Never Seez anti-seizing compound.
®
4.3.14 Hoist the cylinder, spring housing and pressure plate
assembly into position. Noting the position of the air
inlets to the mounting flange, lower the assembly
over the studs and clamp tubes.
4.3.15 Assemble the washers (1
the studs. Tighten the locknuts, ONE TURN AT A
TIME and in a crosswise pattern, until the spring
housing is seated against the clamp tubes. Torque
the locknuts to the appropriate value. See Table 4.
Caution
The locknuts (18) must be tightened gradually to
prevent damage to the brake components.
4.3.16 Re-install the brake per 2.0, 'Installation'.
4.4

Cylinder Seal Replacement

4.4.1 Reference section 6.2 for Cylinder Seal Kit part
numbers.
4.4.2 Disconnect the air supply lines and remove the
screws (20), washers (1
attaching the cylinder (19) to the pressure plate (14).
4.4.3 Carefully slide the cylinder (19) o of the spring
housing (16).
Caution
Do not use compressed air to remove the cylinder
(19) from the spring housing.
4.4.4 Remove the cylinder seals (21, 23) from the spring
housing (16) and thoroughly clean the seal grooves in
the spring housing.
4.4.5 Insert new seals (21) (23) into the grooves, noting the
orientation of the seals per Figure 12.
Airflex DBB 8110 Brake Assembly E-CLCL-TT001-E
®
7) and locknuts (18) onto
7) and spacer tubes (2 7)
Figure 12
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