Wheel Drive Upper Belt Replacement

See Figure 33.

The wheel drive upper belt connects the variable speed (VS) pulley to the drive rollers shaft.

1.Remove wheel drive lower belt. See Wheel Drive Lower Belt Replacement on page 30.

NOTE: The bearing holders slide vertically on the wheel drive frame.

2.Loosen two flanged lock nuts and round head square neck bolts securing each bearing holder to wheel drive frame. Do not remove mounting hardware.

3.Push drive rollers shaft down to release belt tension.

4.Remove two flanged lock nuts and round head square neck bolts securing left-side bearing holder to wheel drive frame.

5.Remove belt from drive rollers shaft pulley and then the variable speed (VS) pulley.

6.Bring belt over left-side bearing holder and remove.

7.Install new belt.

8.Install two round head square neck bolts and flanged lock nuts to secure left-side bearing holder to wheel drive frame.

NOTE: Use the pressure of one finger at the center of the belt span to check for proper flex.

9.Pull drive rollers shaft up to tension upper belt to flex 1/4", ±1/8" (6mm, ±3mm).

10.Snug two flanged lock nuts and round head square neck bolts securing each bearing holder to wheel drive frame.

11.Check that drive rollers shaft is level horizontally by measuring the position of both bearing holders on the wheel drive frame. The positions should be equal (±1/8") on both sides.

12.If adjustment is necessary, gently tap on bearing holders to make position adjustments.

13.Tighten the two flanged lock nuts and round head square neck bolts securing each bearing holder to wheel drive frame.

 

 

 

 

 

Wheel Drive

 

 

 

 

 

Bolt and

 

 

Frame

 

 

 

 

Flanged

 

 

 

 

Bearing

 

 

Lock Nut

 

Holder

 

 

 

 

 

 

 

Wheel

 

 

 

Drive

Drive Rollers

Shaft

 

Upper Belt

 

 

 

 

 

 

 

 

 

 

Blade Drive Belt

Figure 33

14.Install wheel drive lower belt. See Wheel Drive Lower Belt Replacement on page 30.

GB - 31