Nexen SPC 837400 - Manual (Page 8)

8 FORM NO. L-20095-U-1112
4. Loosen the Jam Nut (Item 19) (See Figure 7).
5. Turn each Adjustment Screw (Item 18) counterclockwise
until a 0.79 mm [1/32 inch] customer supplied spacer
can be inserted between each Friction Facing and the
disc. Each side may be adjusted individually (See
Figure 7).
6. With customer supplied spacers inserted, turn
the Adjustment Screw (Item 18) clockwise until a
resistance is felt (See Figure 7).
Note
There should be a gap of 0.79 mm [1/32 inch]
between each Friction Facing and the disc.
7. Remove the customer supplied spacers and tighten
the Jam Nut (Item 19) to 20.3-27 Nm [15-20 ft-lb].
8. Loosen the Jam Nut (Item 31) (See Figure 7).
9. Adjust the Spacer (Item 32) until its spherical end
touches the Block (Item 21) (See Figure 7).
10. Tighten the Jam Nut (Item 31) to 20.2-40.5 Nm [15-30
ft-lb] torque (See Figure 7).
11. Engage the power spring.
Note
Ensure proper hold-off pressure has been maintained.
(This will remove any tension on the tap bolt for
easier release.)
Note
Before performing Step 12, determine the actuator
type and select either step 12a or 12b.
Adjustment
Screw
(Item 18)
Jam Nut
(Item 19)
Figure 7
Block
(Item 21)
Spacer
(Item 32)
Jam Nut
(Item 31)
Jam Nut
(Item 19)
Adjustment
Screw
(Item 18)
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ort
a
ctuator
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nly
12a.Using a 9/16 inch socket, turn the top bolt clockwise
until it bottoms out (approximately 40 turns), then torque
the Tap Bolt to 13.5-20.2 Nm [10-15 ft-lb].
t
wo
-P
ort
a
ctuator
o
nly
12b.Using a 3/4 inch socket, turn the tap bolt clockwise
to fully uncage (decompress the spring. The spring is
fully decompressed when the hex bolt head is flush
against the actuator.
13. Remove hold-off pressure.
Two-port actuator shown.
FIGURE 8
Block
(Item 21
Spacer
(Item 32)
Bearings
(Items 11 and 12)
Bearings
(Item 10)
LUBRICATION
All pivot points on the Single Post Caliper Brake use
self- lubricated high PV bearings.
For tension control applications where the disc is held at
elevated temperatures for extended periods, use a light
machine oil on Bearings (Items 10, 11, and 12) (See
Figure 8).
The sliding spherical contact between the Block (Item
21) and Spacer (Item 32) should be lubricated with a
molybdenum disulfide-based grease (See Figure 8).