121
Section 4 - lubrication & maintenance
WARNING
EXCESSIVE IMPACTED MATERIAL AROUND BELTS AND
PULLEYS IS A COMMON CAUSE OF CUTTER ECCENTRIC
BELT AND PULLEY SYSTEM FAILURE. MAKE SURE TO
INSPECT ECCENTRIC BELT AND PULLEYS FREQUENTLY
AND CLEAN AS REQUIRED.
Checking Belt Tension With Force
Deflection
The proper way to check belt tension is to use a
spring scale tension tester. This type of tester is
used by measuring how much force is required
to deflect the belt at the center of its span by a
specified distance.
Checking belt tension:
1. At the center of the span apply a force per-
pendicular to the span large enough to deflect
the belt on the drive from its normal position.
One sprocket should be free to rotate. Be sure
force is applied evenly across the entire belt
width. If the belt is a wide synchronous belt,
place a piece of steel or angle iron across the
belt width and deflect the entire width of the
belt evenly.
2. If it is less than the minimum recommended
deflection force, the belt should be tightened.
If it is greater than the maximum recom-
mended deflection force the belt should be
loosened.
Belt Tension Specifications:
Hydraulic Motor To Eccentric Drive
Belt Deflection & Tension = Minimum or 0 deflec
-
tion & just enough tension to pull belt straight. A
slight sag is acceptable.
Eccentric Drive Belt (Using Spring Scale
Tester)
Belt Deflection & Tension = .35” (.89 cm) deflec
-
tion @ 30 FT LBS pressure
Typical Spring Tension Belt Tension Gauge
Drive Belt Deflection
(Force Deflection Method)
DRIVE BELT DEFLECTION
CAUTION
OVERTIGHTENING THE HYDRAULIC MOTOR TO ECCENTRIC
DRIVE AXLE BELT WILL CAUSE THE AXLE TO BREAK
AND DAMAGE THE BEARINGS. MAKE SURE TO TIGHTEN
JUST ENOUGH TO PULL THE BELT STRAIGHT. DO NOT
OVERTIGHTEN.
Содержание RH7500
Страница 1: ...RH7500 Operations Manual ...
Страница 2: ......
Страница 6: ...6 NOTES ...
Страница 10: ...10 NOTES ...
Страница 19: ...19 Section 1 Safety Information ...
Страница 20: ...20 NOTES ...
Страница 108: ...108 NOTES ...
Страница 150: ...150 NOTES ...
Страница 155: ...155 Appendix 3 Tools Spare Parts ...
Страница 156: ...156 Appendix 3 Tools Spare Parts ...
Страница 158: ...158 NOTES ...
Страница 163: ......