Vacuum Meter Inspection and Service

causym CAUTION: Follow chemical manufacturer's precautions when handling parts coated with seed treatments. Use proper skin, eye, and respiratory protection.

Annually inspect seed meter for wear and chemical or seed treatment buildup.

1. Check brush (A) for gaps. If gaps are big enough to allow seed to pass through, replace brush as follows:

a. Insert narrow end (B) into slot first.

b. Snap brush into slot until it contacts side of meter housing (C).

2. Replace hub seal (D) if cracked or weathered.

H41910


A-Brush
B-Narrow End
C-Housing
D-Seal

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A55426


A-Wear Example


B-Worn Edge (Seed Cell Side View)


C-Wear Example


D-Wear Example

NOTE: Before disk replacement, properly set meters and vacuum. Perform a field check to determine if disk meters seeds accurately. See Check Seed Population section.

It is not necessary to replace seed disk if metering performance is satisfactory.

3. Check seed disks for wear in following areas and replace as needed.

A small amount of wear around perimeter of disk (A) is acceptable. If worn, check for seed loss through gap between disk and housing.

Seed loss can be eliminated hub adjustments. See ADJUST METER HUB in the Rate Charts and Settings Operator's Manual.

Inspect individual seed cells. Seed abrasion can wear sharp edges on seed cells (B) and increase cell size. (This can cause overpopulation when planting small seed or cause under-population when planting large seed). Replace seed disk if cell size is significantly increased and field checks determine a reduction in accuracy.

Small grooves or scratches are acceptable on vacuum side of seed disk (C).

Wear around perimeter of disk (D) is acceptable up to an approximate depth of 1.0 mm (3/64 in.).

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NOTE: If vacuum seals are replaced, apply Graphite Spray TY25797 on vacuum side of used seed disks. See Lubrication section. New seed disks are factory lubricated.

4. Replace vacuum seals (A) if seed disks are replaced or when large cracks or wear areas are visible.

5. Replace disk wiper (B) if edge of wiper is grooved or excessively worn.


A-Seals
B-Wiper

A51188

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6. Annual cleaning of vacuum meters and seed disks is recommended. Use mild detergent and a soft brush to remove any seed treatment buildup behind plastic (A) in vacuum meter housing..


A-Plastic

A51321

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7. Replace vacuum meter dust cover (A) if it does not fit properly, is cracked, or weathered.

8. Replace rubber handle (B) if cracked or broken.

9. Replace plastic insert (C) and chute cover (D) if worn.

10. Verify drive coupler pivots freely. Disassemble, clean, and lubricate with molybdenum disulfide grease if flex drive does not pivot freely.

11. Place vacuum meter assembly on hopper and attach with nuts (E).


A-Dust Cover
B-Handle
C-Plastic Insert
D-Chute Cover
E-Nuts

A51322
H44347

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