Sun Microsystems Enterprise Tape Library 7/3500, Field Service Manual

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Chapter 2 Preventive Maintenance 35
Y-Axis Belt
▼
To Check the Y-Axis Belt Tension
See
FIGURE 2-8
and
FIGURE 2-9
.
1. Make sure the extension assembly is resting at the bottom of the vertical axis.
2. Locate the middle point of the y-axis belt.
3. With the force gauge supplied in the service kit, pull the inside of the belt
outward 0.54 inches.
Note –
The smooth side of the belt is the outside. The gear side of the belt is the
inside.
4. The force gauge reading should be 19.5
±
3.0 ounces (468-638 g).
▼
To Adjust the Y-Axis Belt Tension
See
FIGURE 2-8
and
FIGURE 2-9
.
1. Loosen the belt clamp screws holding the belt onto the ball bushing housing.
2. Turn the screws one-half revolution:
■
If the measured force is greater than 22.5 ounces (638 g), turn the adjustment
screw counterclockwise (as viewed from above) and recheck the tension.
■
If the measured force is less than 16.5 ounces (468 g), turn the adjustment screw
clockwise.
Note –
The adjustment screw does not normally need to be turned more than two
revolutions.
3. Tighten the belt clamp screws to 30 in. lb. (3.39 N-m).
4. Recheck the belt tension.