Nexen RB45B 968192 - Manual (Page 6)

FORM NO. L-21326-C-0513 6
Figure 5
See Figure 6
Rail Brake
Rail*
Bearing*
*Customer Supplied
Table (end view)
Socket Head
Cap Screws
Base*
Table*
IMPORTANT
Carefully follow Steps 1-4 to ensure
a successful Rail Brake installation.
Do not use the dowel pin holes for
brake installation. These holes are for
manufacturing purposes only.
Figure 6
Table (end view)
Datum
Plane
Note: Brake width is slightly under carriage width.
Small gap (0.010) to be expected.
Shim
Figure 4
MOUNTING ON A RAIL
Assembly Shims: This installation recommends the
use of assembly shims to ensure proper alignment. The
assembly shim is a .08mm (.003”) rectangular shaped
piece of shim stock that runs the full length of the
facings. See Figure 4 for an example. Each shim will be
different depending on rail type. The shim is customer
provided and one is required for each side.
1. Disengage Brake.
a. SPRING ENGAGED VERSION: Apply
minimum 5.5 BAR (80 PSI) to air inlet of brake
to disengage. (Refer to AIR CONNECTIONS
for details).
b. AIR ENGAGED BRAKE: Disengaged is the
default position.
2. Using installation shims, slide brake onto rail with
shims between the facing and the rail on both sides.
The installation shims are approximately the same
thickness as the gap between the facing and the
rail. Because of this some drag is expected while
completing this step.
3. Once brake is approximately in position, install
mounting screws finger tight. Do not tighten at this
point.
4. Engage Brake, this will center it on the rail, then
tighten the mounting screws. Do not remove shims
at this point.
Table 1
Model Socket Head
Cap Screw Size
RB15 M5 x 0.8
RB20 M6 x 1.0
RB25 M8 x 1.25
RB30 M10 x 1.5
RB35 M10 x 1.5
RB45 M12 x 1.75