Roach Conveyors 138LRC, Owner'S Manual

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REPLACING V-BELT AND SHEAVES
INSTALLATION OF BELTING
V-BELT DRIVE PRESSURE ADJUSTMENT
As outlined in previous sections, the impor-
tance of properly setting drive tension and
drive pressure on V-belts simply cannot be
overstated. When V-belt or drive sheaves
are out of adjustment, life of sheaves and
V-belting may be drastically reduced, thus
requiring untimely replacement(s).
Before ANY maintenance operations are
performed on belt driven live roller curves
or spurs, it is VITAL that ALL conveyors are
shut “OFF” and power source is locked out.
Confirm that power source has been locked
out before beginning maintenance.
For replacing V-belt, remove conveyor tread
rollers, loosen take-up assembly as previ-
ously noted and remove belt. Use
old belt to identify replacement, which is
readily available from Roach or may be
purchased locally to expedite replacement
procedure. Install new belt, tread rollers
and re-set belt tension.
Should any drive sheaves require replace-
ment, consult Roach distributor for new
sheaves. Remove nut from drive sheave
axle, remove worn sheave and replace with
new unit. Replace nut and set drive sheave
pressure as previously outlined.
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
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.
Maintaining proper drive belt pressure is
vital to proper unit operation and long
V-belt life. Over-applying drive belt pres-
sure requires more horsepower and may
harm unit drive and take-up components.
Belt life is drastically reduced when unit is
operated with incorrect drive belt pressure.
Belt driven live roller curves and spurs
require adequate drive pressure on the
drive belt to convey the heaviest unit load.
Therefore, if curve or spur does not properly
convey the heaviest unit load, adjust the
drive belt pressure as outlined below.
To increase drive belt pressure, move
sheave “up” (see above illustration) toward
roller. To decrease drive belt pressure,
lower sheave away from roller. Make
adjustments in small increments. DO NOT
place too much drive pressure on sheaves.
In worst conditions, conveyor may stall, thus
causing motor to overheat and
untimely unit shut down, when drive sheaves
have been raised too high.
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