Norton BBL547 Owner's Manual page 20

3. The saw uses a belt driven mechanical pump which only operates when the
engine/motor is running.
4. Handle on petcock should be turned in line with the water flow. Start motor and
be certain that both sides of the blade are getting water.
5. Be sure that the water covers the bottom of the pump at all times. Do not let
sludge and dirt get deep enough in the pan to block the pump inlet.
6. Use "step" cutting with abrasive blades as previously directed.
7. Use "jam" cutting or "step" cutting with diamond blades as previously
described.
III. MAINTENANCE
The saw requires very little maintenance for long satisfactory operation. However,
the following points must be watched:
A. V-Belts
The drive belts are made of premium oil and heat resistant materials. They require
very little adjustment, but should be tightened after the first few days of running.
Adjustment and Alignment
Warning: Never make adjustments to v-belts and pulleys while engine is running.
1. The best tension for a v-belt drive is the lowest tension at which the belts will
not slip under full load.
2. Simply take up the drive until the belts are snug in the grooves. Run the drive
for about 15 minutes to "seat" the belts. Then impose the peak load. If the belts
slip, tighten them until they no longer slip at peak load.
3. Remember, too much tension shortens belt and bearing life.
4. Check belt tension frequently during the first day of operation. Check belt
tension periodically thereafter and make any necessary adjustments.
5. The two most common causes of misalignment are shown in the drawing.
a). The engine drive shaft pulley and the blade shaft are not parallel. See figure I
b). The pulleys are not located properly on the shafts. (See figure 2)
6). To check alignment, all you need is a steel straight edge.
7). Line up the straight edge along the outside faces of both pulleys as shown in
the drawing.
8). Misalignment will show up as a gap between the pulley face and the straight
edge.
9). Make sure that the width of the outside land is equal on both pulleys.
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