Installation, Operation – Nexen BC288A 835200 User Manual
Page 5
5
FORM NO. L-20066-C-1209
INSTALLATION
1. Assemble the two Brake Caliper halves together with
the Connecting Rods (Item 7) and Hex Nuts (Item 17).
At this time, adjust the space between the Friction
Fac ings (Item 5) to the thickness of the disc or linear
device used. Add 1/16 inch for facing clearance.
Tighten the Hex Nuts to the torque recommended in
Table 1.
NOTE: Before mounting the Spring-Actuated Brake
Caliper: Be sure the brake is in the manual released
position (See paragraph two of the OPERATION
SECTION); and Install the air connection fittings
and tube (See step two in the AIR CONNECTIONS
section).
2. Mount the Brake Caliper assembly on a support that is
capable of sustaining the loads produced during brak-
ing. See the mounting cap screw size and tightening
torque recommendations in Table 1.
3. Position the brake so there is 1/32 inch between both
sides of the disc and the facings. The outside radius of
the disc should run approximately 1/16 inch below the
radius of the friction facing. The fric tion facings should
be as parallel to the disc as possible to minimize facing
wearing time,
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TABLE 1
OPERATION
Friction Facing Wear Adjustment:
1. To maintain new facing torque levels, periodic ad-
justments for facing wear is necessary. Optimum
torque is derived with a 1/32 inch gap on each side
of the disc.
2. Apply 90 PSI hold-off air pressure at the air inlet and
inspect the gap between the friction facing and the
disc.
3. Loosen the set screw hex nut (item #17) and turn the
set screw CW until a 1/32 inch spacer can be slid
between the facing and the disc.
4. Remove the spacer and retighten the hex nut.
A
ir
A
ctuAted
u
nit
This unit engages when air is applied to both calipers.
Return Springs (Item 12) disengage the calipers when air
exhausts from the cylinders.
S
pring
A
ctuAted
u
nit
Manual Release:
1. Loosen the Hex Nut (Item 17) attached to the Set
Screw (Item 20). Use an Allen wrench to turn the Set
Screw CCW until the Return Springs (item #12) pull
the Shoe/Facing assembly back against the cylinder
(Item 1).
2. Adjust the caliper halves for the space require ments
as described in the INSTALLATION section.
Reset:
1. Apply 90 PSI hold-off air pressure at the air inlet.
2. Turn the Set Screws CW until the Shoe/Facing as-
sembly just starts to move towards the disc; tighten
the Hex Nuts.
3. Release the hold-off pressure to engage the spring
actuated Brake Caliper.