Calibrating Insecticide/Herbicide Meter

If it should ever become necessary to recalibrate the granular meter on the insecticide/herbicide hopper, proceed as follows:

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1. Turn the knob on the rear of the hopper to a setting of "10".

2. Remove the hopper and turn it upside down on a flat surface.

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3. Check the opening (A) of the "V" notch on the meter gate. The opening should be at shown specifications . If it is, the meter is calibrated correctly. If it is not, adjustment must be made.

Specification

A-Opening

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4. Remove four M6 x 20 cap screws (A) securing the meter to the hopper (eight cap screws if two meters are used) and remove the meter(s) from the hopper bottom.

A-Cap Screws

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5. Remove four M6 x 16 cap screws (B) from the gate cover and remove the cover (C).

B-Cap Screws
C-Cover

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6. Remove the entire plastic gate assembly (A) from the aluminum housing.

A-Gate Assembly

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7. Remove the knob (B) from the splined nut (C) by working the knob back and forth while pulling apart.

B-Knob
C-Splined Nut

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8. Turn the nut (C) until the opening in the "V" on the gate is at shown specifications.

Specification

C-Splined Nut

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9. Replace the knob on the nut so the number "0" lines up with the number "1" on the cam follower. The meter should have a setting of "10".

Seat knob to the flange on the nut.

10. Replace gate cover and secure with cap screws removed in step 5.

11. Replace meter on hopper bottom and secure with cap screws removed in step 4.

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