Meter Drive System Description

Meter drive starts with forward travel of the cart's left-hand rear tire (A).

As the tire rotates, gear set (B) inside the axle housing turns to drive the main clutch input shaft.

A-Left-Hand Rear Tire
B-Gear Set

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Above the gear set is the ground speed sensor (A). Sensor sends a signal to the cart's electronic controller to display ground speed in miles-per-hour (mph) on the tractor-mounted console.

Accumulated area is also recorded from this sensor's signal.

A-Ground Speed Sensor

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When the main clutch (A) is engaged, the output sprocket (B) turns to drive meter chain (C) and input sprocket of one-way clutch.

Sprockets at the main and one-way clutch are "component specific" parts and not a matched set.

The main clutch output sprocket is rear tire size specific. Should the rear tires of the cart be changed, the tire sprocket must also be changed to agree with new tire size or meter drive speed will be incorrect for new requirement. Tooth count is stamped into each sprocket for easy identification.

NOTE: Base sprocket selection on similar travel distance [mm (in.) traveled in one tire revolution] when unlisted tire size is used.

A-Main Clutch
B-Output Sprocket
C-Drive Meter Chain

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An adjustable idler sprocket (A) keeps tension on meter drive chain.

The one-way clutch (B) only engages when the left-hand tire turns in forward direction. The clutch disengages when the tire travels backward, to keep drive train components from reversing direction.

The input sprocket (C) of the one-way clutch is row spacing specific. Should the cart be moved to a different seeding tool, with different row spacing, the sprocket must be changed to agree with new row spacing or meter drive speed will be incorrect for new requirement. Tooth count is stamped into each sprocket for easy identification.

The transmission drive shaft is attached to the output side of the one-way clutch.

A-Adjustable Idler Sprocket
B-One-Way Clutch
C-Input Sprocket

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The drive shaft (A) runs through the rear transmission to the front meter transmission (B). Drive shaft runs through the middle transmission when equipped with an optional middle tank.

Transmission output speed is adjusted to turn meter fast enough to deliver product at desired application rate.

A-Drive Shaft
B-Front Meter Transmission

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Transmission output shafts (A) run across the frame to independent meter clutches (B) on the right-hand side.

Meter clutches make it possible to turn off one meter while continuing to deliver product from the other meter(s). Clutch is disengaged when solenoid lever (C) is down and locked in outer clutch member.

In the event of an electronics failure, clutch can be set in engaged position by lifting solenoid lever and manually retaining in raised position.

A shear pin (D) is used to protect drive transmission from damage caused by loading meter cartridge with product when fan is not running. Spare shear pins (2.5 mm diameter cotter pin) are provided with the machine and stored in holes at the clutch bracket.

A-Output Shaft
B-Meter Clutches
C-Solenoid Lever
D-Shear Pin

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With the meter clutch engaged, output sprocket (A) turns to drive chain (B) and meter shaft input sprocket (C). Chain guide (D) keeps chain tensioned.

A-Output Sprocket
B-Drive Chain
C-Input Sprocket
D-Chain Guide

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