DR Power Walk-Behind 6.5 (Pre-August 2010) - Manual (Page 42)

38 DR
®
WALK-BEHIND LEAF & LAWN VACUUM
8. Carefully install the Master Chain Link (Figure 23 on page 37) in the reverse order of step 5, making
sure that the Lock Clip is securely in place.
9. Slide the Axle Bearing Mount toward the rear of the machine, to take up the slack of the Chain, and
loosely tighten the Bearing Mount Bolts just enough to hold it in place but leaving it movable.
10. Rotate the Left Rear Wheel to find the location where the Drive Chain is tightest, since there are
always slight variations in the sprockets that make the Chain tighter at certain places in its rotation.
11. At the point where the Chain is the tightest, slide the Axle Bearing Mount very slightly forward to
achieve a total slack (up and down travel) of 1/4" to 1/2" in the Chain when measured halfway
between the Axle Sprocket and the Transmission Sprocket, and then tighten the Axle Bearing
Mount Bolts.
12. Rotate the Left Rear Wheel several times and listen for a “popping” or “cracking” noise. This noise
indicates too much tension on the Chain. If this is the case, loosen the Axle Bearing Mount Bolts
and slide the Mount very slightly forward to loosen the Chain just a little, and then recheck it.
13. Retighten the Axle Bearing Mount Bolts and re-install the Belt Cover.
14. Reconnect the Spark Plug wire.