ABB DODGE PARA-FLEX - Flexible Element Replacement; Element Removal and Cleaning; Clamp Ring Screw Tightening Procedure; Flexible Element Installation

2
B
PX50-120 TL
B
PXFBS
B
PXBBS PXTBS
B
Flange
Flex
Internal
External
Figure 2 - Three-Piece Flange Styles
Figure 3 Figure 4
NOTE: Many sizes of PARA-FLEX elements are supplied with a
cardboard gauge to facilitate accurate flange spacing before
installing the rubber tire element. This gauge comes in the
box with the element. Gauges not supplied for PX40 and PX140
through PX320. Gauges should not be used for alignment
purposes.
FLEXIBLE ELEMENT INSTALLATION
1. Clean ange mounting area as well as surface that will
come in contact with the element with a solvent, such as
Xylene (Xylol), to remove grease, oil, wax, and dirt from
surfaces. Do not clean the element with the solvent. A
diluted soapy water solution may be applied to aid with
element installation.
2. Wrap exible element around anges as shown in Figure 5.
Make sure beads of element are fully worked down upon
the seats. To ensure proper seating, tap around the tire’s
outside diameter with a small mallet until split is closed.
Make sure element is evenly centered on the anges.
3. Hold split of exible element closed as shown in Figure
6. Tighten (nger tight) one or two screws 180° from split.
Using both hands, knead the tire pulling it toward the split.
Hold split closed and tighten (nger tight) the next two
screws farthest from the split. Repeat the procedure on
all remaining clamp ring screws. Use a torque wrench to
tighten each clamp ring screw in succession to the torque
specied in Table 1. Using a torque wrench, recheck all
clamp ring screw torque values before coupling operation.
4. Optional Procedure: Hold split of exible element closed as
shown in Figure 6. Tighten (nger tight) one or two screws
180° from split. Using both hands, knead the tire pulling it
toward the split. Hold split closed and tighten (nger tight)
the next two screws in a star or cross pattern as shown in
Figure 7. Repeat the procedure on all remaining clamp ring
screws. Use a torque wrench to tighten each screw to the
torque specied in Table 1. Using a torque wrench, re-
check all clamp ring screw torque values before coupling
operation.
5. Install coupling guards per OSHA or applicable
requirements. Guarding should be designed so that
coupling tyre will be contained within the guard in the
event that the coupling tyre is thrown from the coupling
assembly.
3
1
8
6
4
2
7
5
Figure 5 Figure 6 Figure 7
FLEXIBLE ELEMENT REPLACEMENT
Loosen all clamp ring screws. Grasp one end of exible element
at the split and peel off the anges. Clean clamping parts with a
solvent, such as Xylene (Xylol), to remove grease, oil, wax, and
dirt from surfaces. Do not clean element with solvent. Check
to see that only one or two threads of each clamp ring screw
are engaged. Re-align anges and install new exible element
according to the sections on ange installation and exible
element installation. When replacing clamp ring screws and
washers, use only SAE Grade 8 or ISO Class 10.9 screws and
hardened washers.
WARNING: The metal components of the coupling that clamp
the flexible element will operate properly only if the screws are
tightened properly. Tightening one screw to full torque before
proceeding to the next screw may cause excessive clamp ring or
flange deflection. To prevent clamp ring and flange deflection, the
screws must be evenly and gradually tightened to full torque.
FLOATING SHAFT COUPLING INSTALLATION
Piloted Internal
Clamp Ring
Assembly
BBPS x BBPS
BBPS x TBPS
TBPS x TBPS
Flexible
Element
Floating
Shaft Bearing
Assembly
FLG. to FLG. Distance
F/S FLG. to FLG. Distance
BPS
Flange
BCS
Flange
External
Clamp Ring
BB
Figure 8 - Floating Shaft Coupling
1. Disassemble the clamp rings from the anges. Place the
external clamp rings on the shafts with the grooved side
facing the shaft end.
2. Check the axial oat of the shafts. Position the shafts at the
mid-point of the oat. Where Limited End Float is required
or Sleeve Bearings are used, consult Mechanical Power
Transmission Support for application assistance.
3. Referring to Figure 8 and Table 1, observe the “B”
dimension for the coupling size being installed. Mount and
position the anges on the shafts so that dimension “B” is
achieved when the shafts are in their nal position. Where
anges contain set screws, tighten to values listed in Table
2.
4. Remove any anti-rust lubricants or oil from the grooved
side of the clamp rings. Assemble internal and external
clamp rings to oating shaft anges and snug up clamp
ring screws. Slip internal piloted clamp rings onto the
turned down portion of oating shaft. Hub projection on
clamp ring should be toward oating shaft as shown in
Figure 8.
5. Position and support oating shaft assembly between
driving and driven anges. Make sure clamp ring pilot is
seated in ange counterbore. Assemble external clamp
rings to ange with screws. Tighten screws sufciently to
prevent movement between the parts.
6. Align anges using precision equipment such as dial
indicators or laser equipment. If precision equipment
is not available, scales, straight edges, and calipers
can be used as less accurate means of alignment. If
using a scale or calipers, refer to Figure 3 and check the
angular misalignment by measuring dimension “B” at
four places 90° apart. Adjust the equipment until the four
measurements do not vary more than value “C” in Table
1. Repeat the procedure at both ends of the coupling. To
achieve maximum coupling performance, align the coupling
as accurately as possible during initial installation.
7. Loosen clamp ring screws and proceed to Section II for
element installation.