Nordco Trailblazer BC60, Руководство по эксплуатации и обслуживанию

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BC 60 "Trailblazer" Brushcutter
MAINTENANCE
AUGUST/2012 (49458202/8203)
Section 3-9
T6. Inspect Sheaves and Sheave Bearings
Rope sheaves should be periodically
inspected for roughness and worn spots.
Worn sheaves may damage the rope
which could result in rope breakage or
bad spooling. A proper fitting sheave
should support the rope over 135 – 150
degrees of rope circumference.
All sheaves should be checked for
cracks, grooving, or damage from two-
blocking. Undue looseness in the
bearing or bushing should be noted. The
sheave's groove surface should be
smooth and slightly larger than the wire
rope being used.
Proper maintenance of the equipment on
which the ropes operate has an
important bearing on rope life. Worn
grooves, poor alignment of sheaves and
worn parts resulting in shock loads and
excessive vibration will have a
deteriorating effect.
SHEAVE BEARINGS
Check the bearings for lubrication, signs
of wobble and ease of rotation. Worn
bearings cause vibration
in the rope, increasing wire fatigue.
Repair the bearings or replace the
sheave.