Setting Backshaft Speed

IMPORTANT: Machines equipped with a variable-belt drive feeder house are designed for use with a corn head or row-crop head. Using variable-belt drive at excessive speeds when combine is equipped with a cutting platform can cause vibration and excessive wear to cutterbar parts.

Minimum backshaft tachometer speed (at no load and at high engine idle) must be kept from 490 through 530 rpm.

When connecting combine to cutting platform after using other front-end equipment that utilizes variable-belt drive at higher speeds, do the following:

1. Engage separator and header for field operation.
2. Press and hold reel lower switch until backshaft speed is at minimum speed.
3. If backshaft minimum rpm speed is not reached, adjust feeder house belt (See Combine's Operator's Manual for adjustment procedures).