Eaton Airflex DBB, Руководство по сборке

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TABLE 3
Fastener Description and Assembly Torque ft-
lb (Nm) [Lubed]
Fastener 20DBB
Item #18
Description 3/4-10NC-3
Torque 150 (203)
Item #20
Description
3/4-10NC-2 Gr.
8
Torque 150 (203)
Item #36
Description
3/8-16NC-2 Gr.
8
Torque 40 (54)
Mounting
Screw
Description
5/8-11NC-2 Gr.
8
Torque 138 (187)
2.1.3
Alignment
2.1.3.1
For proper operation and service life, the
brake reaction member must be aligned
to the shaft within the limits shown on
Table 2.
Proper alignment is necessary to
assure the friction discs track prop-
erly. Improper alignment will result
in excessive wear to the friction
material and its mating surfaces,
gear and ring gear. See Figure 3.
2.2 Mounting
NOTE: Prior to installing the brake, apply
100 psi air pressure releasing the spring
tension and slide the gear into the brake
assembly aligning the disc sub-assemblies,
exhaust the air to clamp them into position
and remove the gear.
Maximum allowable air pressure is
120 psig (8.2 bar). Application of
pressure exceeding maximum
allowable may result in damage to
the brake.
2.2.1
Ensure the shaft is free of nicks or burrs and
the ket fits properly in the shaft and gear.
Tap the key into the shaft keyway.
2.2.2
Apply a light coat of anti-seizing
compound to the shaft and key.
2.2.3
Press the gear onto the shaft, making sure
the dimension between the gear and the
brake mounting surface (".38") is main-
tained. See Figure 1 and . Heating the gear
uniformly to approximately 250
o
F (121
o
C)
will expand the bore and ease assembly.
2.2.4
Apply a light coat of MOLUB-ALLOY
®
412
ES grease to the gear teeth and pre fill the
groove in the friction disc splines as shown
on figure 4.Slide the brake assembly onto
the gear.
2.2.5
While supporting the brake, connect an
air supply and apply enough pressure to
release the brake. Attach the mounting
flange (1) to the brake mounting surface
using the appropriate fasteners. Torque the
fasteners to the specified value. See Table 3.
Use only the proper number and
grade fasteners shown in Table 4.
Use of commercial grade (Grade 2)
fasteners where Grade 8 fasteners
are specified may result in failure of
the fasteners and a sudden and
drastic reduction in brake torque.
Figure 4
DBB 8104 PDF format
4
© Copyright Eaton Corp., 1998. All rights reserved.
(Revised: January, 1998)