Finger Pickup Mechanism

Empty the finger pickup of all corn, chaff, and foreign material after every 50 hours of use. This may be done by removing the seed hopper from the shank and dumping all material. Be sure that the baffle covering the fingers is also emptied. Rotate the finger pickup several revolutions by hand to free any corn or foreign material from beneath the fingers and empty this material before replacing the seed hopper on the planting unit.

To thoroughly inspect the finger pickup mechanism, remove it from the seed hopper. This may be done by the following procedure:

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Remove the seed hopper from the planter and remove the two wing nuts (A) that secure the finger pickup mechanism to the bottom of the seed hopper. With the seed hopper upside down, pull the finger pickup mechanism straight up to disengage it from the two mounting studs in the retainer ring.

A-Wing Nuts

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Remove the baffle (B) from the front of the finger pickup assembly (A) to provide access to the fingers by removing the three screws.

A-Finger Pickup Assembly
B-Baffle

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IMPORTANT: Never turn finger pick up mechanism backwards. Damage to the brush will result.

Turn the finger pickup by hand to see that the springs are holding the tabs of the fingers in contact with the carrier plate in the appropriate area (A) and that the cam is raising the fingers properly in the remaining area (B).

If there is an excessive build up of seed treatment material or chaff beneath the finger holder, disassemble and clean the mechanism as follows:

Remove the cotter pin, nut lock, and adjusting nut from shaft (C). Carefully lift finger pickup assembly off shaft and clean.

A-Tab Holding Area
B-Cam Raising Area

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To replace fingers (A) or springs (B), remove springs from finger and remove finger from carrier. When replacing fingers, be certain to install springs with open end of spring loop toward inside of finger holder.

A-Finger
B-Spring
C-Notch In Bearing
D-Cam Projection

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NOTE: Finger should seat in holder so holder is flush with carrier plate when assembled. Be certain to align notch in bearing (C) with projection on cam (D).

Before installing the finger pickup assembly on the carrier, check the dimples (A) on the carrier plate for wear.

The carrier plate is made of case-hardened steel with a hard chrome plated wear surface. Excessive wear of the carrier plate at the dimples will result in over population, especially with small seed corn sizes.

Inspect the carrier plates yearly. Replace the carrier plates when the hard chrome surface has worn away and the case-hardened steel begins to wear. This will be identifiable by the change in the shape of the dimples.

A-Dimples

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Install finger pickup assembly and adjusting nut (C) on shaft. With finger holder firmly seated against carrier plate, turn nut clockwise by hand until it contacts the finger holder and you feel a slight resistance.

Continue to turn nut two flats clockwise (one third turn) until finger holder is properly positioned against carrier.

IMPORTANT: Never turn the finger pickup mechanism backwards. Damage to the brush will result.

Turn finger holder by hand to be certain mechanism is not over tightened. Finger holder must be adjusted firmly against carrier but still turn by hand with moderate force.

Install nut lock (B) and cotter pin (A).

A-Cotter Pin
B-Nut Lock
C-Adjusting Nut

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As a check on the above adjustment, there should be less than 0.15 mm (0.006 in.) gap between the finger holder and carrier with light tension on a finger tab adjacent to the area being measured. Raise the finger tab until contact is felt, then use a feeler gauge as shown.

IMPORTANT: Check tightness of adjusting nut periodically. Failure to maintain proper finger assembly adjustment will result in a loose finger assembly which will tend to over populate, especially with small seed corn sizes.

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