Roach Conveyors 138LRC, Owner'S Manual

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ADJUSTING V-BELT TENSION
INSTALLATION OF BELTING
V-BELT CONNECTIONS
In some applications (180 degree, long
straight tangents, etc.), curves are manu-
factured in two or more sections requiring
the use of more than a single drive belt.
Although set up and test run (and, subjected
to quality control inspection) at the factory,
unit may require disassembly for
shipping. In such cases, V-belt must be
re-connected before operation.
To reconnect belts, determine curve section
containing double sheave drive assembly,
or “drive section” in illustration above. This
drive section features drive V-belt shipped
mounted as required. The V-belt on the
adjoining curve section, or “driven section”,
must be attached to double sheave drive
assembly. To install, loosen V-belt take-up
sheave on driven section to allow adequate
slack in V-belt for attachment to double
sheave. Then, complete
V-belt assembly by properly adjusting
take-up sheave in center of driven section as
outlined in following section.
NOTE: Depending on the model or BF
of curve or spur, there are several take-up
configurations available. See page 9 of
manual for more information.
WARNING: Safety finger guards are
located above V-belt on all live roller
curves and spurs. Removal of finger guard
assemblies may result in serious injury to
personnel stationed near or coming in
contact with conveyor. V-belt must be kept
in good condition and belt tension must be
properly adjusted for safe work environ-
ment. BEFORE ANY ADJUSTMENTS ARE
ATTEMPTED, SHUT “OFF” AND LOCK
OUT POWER SOURCE.
WARNING: Safety finger guards are
located above V-belt on all live roller
curves and spurs. Removal of finger guard
assemblies may result in serious injury to
personnel stationed near or coming in con-
tact with conveyor. V-belt must be kept in
good condition and belt tension must be
properly adjusted for safe work environ-
ment. BEFORE ANY ADJUSTMENTS ARE
ATTEMPTED, SHUT “OFF” AND LOCK
OUT POWER SOURCE.
Maintaining proper belt tension is vital to
proper unit operation and long V-belt life.
Over-tensioning drive belt requires more
horsepower, decreases belt life and may
harm unit drive and take-up sheaves.
To increase drive belt tension (or, to take
up slack in V-belt), move take-up sheave
toward outside of curve (or spur) by adjust-
ing take-up rod on take-up sheave (see illus-
tration above). Be careful not to
over-tension belt.
To “decrease” belt tension, move take-up
sheave toward inside of curve (or spur) by
adjusting take-up rod on take-up sheave.
When adjustment is complete, tighten jam
nut to complete tensioning procedure.
Make adjustments to drive belt in small
increments.
For adjusting drive pressure applied to
V-belt from drive sheaves, see next section.
NOTE: When adjusting V-belt tension,
V-belt must remain parallel with end sheave
until reaching first alignment sheave (sheave
may be flat idler or V-grooved).
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