Great-plains P12720 User Manual download pdf (Page 29)

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Operating Instructions

4. Adjustment / Operation

Light / Medium Soils

Heavy Soils

Start

Setting

Possible

Variation

Dim. A 190mm (to 185mm)

Dim. B 195mm (to 180mm)

Start

Setting

Possible

Variation

Dim. A 195mm (to 175mm)

Dim. B 200mm (to 185mm)

Disc Angle Adjustment Jacks

4.5.1 Variation of Settings

If working conditions change (for example, from dry to wet conditions) then the following table

should be consulted as a rough guide.

VARIATION IN CONDITION SETTING REVISION

REDUCE DISC ANGLE (INCREASE DIM A & B)

INCREASE DISC FRAME PITCH & DRAWBAR SHIM LENGTH

(RATIO 2 DRAWBAR : 1 DISC PITCH)

INCREASE DISC ANGLE (DECREASE DIM A & B)

REDUCE SPEED

INCREASE DRAWBAR SHIMS

DECREASE DISC FRAME PITCH & DRAWBAR SHIM LENGTH

(RATIO 2 DRAWBAR : 1 DISC PITCH)

INCREASE DISC ANGLE (DECREASE DIM A & B)

REDUCE SPEED

FROM HARD/DRY TO LOOSE/WET

FROM STUBBLES TO HIGHER TRASH

(TO INCREASE INCORPORATION)

FROM SHALLOW TO DEEP (NOTE 75-

100mm MAX WORKING DEPTH)

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 41 42

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Great-plains P12720 User Manual Page 29