Caution, Installation, Actuator – Nexen VC500 837450 User Manual
Page 5: Disc
5
FORM NO. L-21156-F-0209
aCTuaTOr
nOTe: The Spring actuator assembly is designed for
extended service life. Due to this long product life, the
assembly is permanently sealed to protect users from
potentially dangerous spring forces. Do not attempt
to service the actuator or remove the welds on the
actuator bolts.
all ServICe muST be PerFOrmeD by TraIneD
nexen PerSOnnel.
Figure 2
Spring
Actuator
Assembly
InSTallaTIOn
Dial
Indicator
Figure 1
DIAMETER
mm [inches]
PRODUCT
NO.
QD
BUSHING
TORQUE
Nm [ft-lb]
356 [14]
934202
E
81 [60]
406 [16]
934203
E
81 [60]
457 [18]
934204
J
182.5 [135]
508 [20]
934205
J
182.5 [135]
559 [22]
934206
J
182.5 [135]
610 [24]
934207
J
182.5 [135]
Table 1 (non-ventilated Discs)
R
E
T
E
M
A
I
D
]
s
e
h
c
n
i[
m
m
T
C
U
D
O
R
P
.
O
N
D
Q
G
N
I
H
S
U
B
E
U
Q
R
O
T
]
b
l-
t
f
[
m
N
]
5
2
.
8
1
[
4
6
4
0
0
2
4
3
9
J
]
5
3
1
[
5
.
2
8
1
]
1
2
[
3
3
5
0
0
3
4
3
9
J
]
5
3
1
[
5
.
2
8
1
]
4
2
[
0
1
6
0
0
4
4
3
9
J
]
5
3
1
[
5
.
2
8
1
Table 2 (ventilated Discs)
DISC
1. Thoroughly inspect the tapered bore of the disc hub
and tapered surface of the Q.D. bushing. Remove
any dirt, grease, or foreign material. Do not use
lubricants for this installation.
2. Insert the Q.D. bushing into the disc hub, aligning
the untapped holes in the bushing flange with the
tapped holes in the disc hub.
3. Insert the pull-up bolts and tighten to the
recommended torque (See Tables 1 and 2).
nOTe: runout is minimized if a dial indicator is used
as the pull-up bolts are tightened. Place contact tip of
the Dial Indicator on the machined surface of the rotor
to measure runout. runout should be less than 0.254-
0.381 mm [0.010-0.015 inches] (See Figure 1).
CAUTION
exceeding the specified tightening torque
creates excessive pressures in the hub.
leave a gap between the flange of the
Q.D. bushing and the disc hub to ensure
a proper fit of the Q.D. bushing onto the
shaft or breakage can occur.
4. To remove the Q.D. bushing, remove the pull-up
bolts and reinsert into the threaded holes. Tighten
the pull-up bolts to push the disc off the Q.D.
bushing.
lIFTInG Gear
A tapped hole has been added to the pivot pin of
the VC500 to ease installation and transport. (See
Figure 2).
Tapped Hole
1/2"-13
.88
Deep