Revision 6
H.
V-belt
Note:
Refer to Section 9: PARTS for breakdowns and parts lists for the following
procedures:
Service People required: 2
(1
if
a chain hoist
is
available)
Recommended Tools: Chain hoist, 9/16" socket & ratchet, Special Tool (PM12969 Belt
Tensioning Gauge), set
of
assorted Allen wrenches, large adjustable wrench, wide flat blade
screwdriver, and a finishing file
Parts: New V-belts
Supplies: Container of clean light machine oil (SAE lOW) and lint-free rags
WARNING:
BLEED DOWN ALL HIGH PRESSURE LINES.
PUT
A "DO
NOT
OPERATE"
TAG
ON THE CONTROLS. FAILURE
TO
DO SO
MAY
RESULT
IN
DAMAGE
TO
EQUIPMENT AND/OR PERSONAL INJURY.
1.
Remove guard bolts with 9/16" socket and ratchet and, with the assistance
of
another
person, or chain hoist, remove guard from unit.
2.
Loosen
up
retaining bolts on sheaves. Pry belt out with a screwdriver.
3.
Do not drive sheaves on or off shafts. Be sure shaft and keyway are correct size.
Remove burrs by pressing lightly with a finishing file. Wipe shaft, key and bore clean
with a light oil. Tighten screws carefully. Recheck and retighten after eight (8) hours
of
operation.
4.
Belts should never be forced over sheaves. More belts are broken from this practice
than from actual failure in service.
5.
Belt tension should be reasonable. When in operation, the tight side
of
the belt should
be in a straight line from sheave to sheave with a slight bow on the slack side.
Insufficient tension can cause rapid
belt wear and failure. Check belt tension weekly
or
after 40 hours of operation with Special Tool (PM12969 Belt Tensioning Gauge) (Figure
8-87).
© Copyright October,
2001
NLB Corporation
8-
73
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