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

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118 Sun Enterprise Tape Library 7/3500 Field Service Manual • July 1997
Y-Axis Drive Belt
Required Tools
Short handled Phillips screwdriver, small wrench
▼
To Remove the Y-Axis Drive Belt
1. Remove power from the library.
Caution –
DO NOT disconnect the power cord from facility power or the library.
The power cord is the only means of grounding the chassis and helping to prevent
electrostatic discharge (ESD) damage.
2. Connect your ESD wrist grounding strap to the closest grounding point on the
frame of the library.
3. Remove the top, left, and right cosmetic panels as shown in “Top, Right, and Left
Panels” on page 92.
4. Move the horizontal axis to the rear of the library and secure the extension axis
assembly midway up the y-axis.
5. From the left side of the library, on the y-axis assembly, loosen the belt tensioning
adjustment screw by loosening the jam nut and unscrewing it to its fullest
extension. (
FIGURE 4-12
).
6. Loosen (to near removal) the screws in both halves of belt tensioner.
7. Allow the belt to fall away.
Note – The top pulley is held in place by the belt and gravity. Use care when
removing the belt not to dislodge the top pulley.
▼
To Replace the Y-Axis Drive Belt
1. Thread the belt over the top pulley (tooth side in).
2. Thread the inner side of the belt under the bottom pulley and place the last two
teeth into the tooth slots of the tensioner fixed half.
3. Hold the tensioner fixed half and belt tightly while securing the two lower screws.
4. Working with the outer side of the belt, place the last two teeth into the tooth slots
in the tensioner adjustable half.