3M 800a manual Drive Belt Tension, Refer to -8A

13-MAINTENANCE AND REPAIRS (continued)

Drive Belt

Direction

Discharge End Infeed End

	25mm [2 Inch] Def ection
Box Drive Belt
	@ 3.5 kg [7 lbs.] Pull Force at Midspan

Figure 13-7 – Box Drive Belt Tension Adjustment, Top View

WARNING

•To reduce the risk associated with pinch, entanglement and hazardous voltage:

−Turn electrical supply off and disconnect before performing any adjustments, maintenance or servicing the machine or taping heads

13.10Drive Belt Tension

Tension adjustment of the drive belts may be required during normal operation. Belt tension must be adequate to positively move the box through the machine and they should run fully on the surface of the pulleys at each end of the frame. The idler pulleys on the infeed end are adjusted in or out to provide proper belt tension. Each belt is adjusted separately.

Belt tension is obtained by tightening the adjustment screw so that a moderate pulling force of 3.5 kg [7 lbs] applied at the mid span, as shown in Figure 13-7,will deflect the belt 25mm [1 inch]. This will assure positive contact between the belt and the drive pulley on the discharge end of the taping head.

To adjust belts, see "Maintenance – Drive Belts", steps 3 and 7.

13.11 Special Set-Up Procedure

WARNING

•To reduce the risk associated with mechanical and electrical hazards:

−Turn electrical and air supply off and disconnect before performing any adjustments, maintenance, or servicing the machine or taping heads

The following changes to the case sealer will allow taping boxes 90mm [3-1/2 inches] minimum height.

13.11.1Case Sealer Frame

(Refer to Figure 13-8A)

1.Raise the upper head assembly (by turning crank handle counterclockwise). Remove and retain the two screws and washers from the normal position holes "A-A".

2.Remount and secure the stop bracket in the lower position "A" using the top holes and original fasteners. Re- locate both the right and left stop brackets.

800a-NA 29 2011 August