Operating instructions

Great Plains Manufacturing, Inc. Table of Contents Index Maintenance 39

2013-03-25 Table of Contents Index 403-362M

Chain Maintenance

Inspect and lubricate chains regularly. The slack of new

chains tends to increase during the ﬁrst few hours of

operation due to seating.

See also “Chain Routing YP4025F” on page 51.

Chain Slack

Check slack at ﬁxed idlers within the ﬁrst 8 hours of

operation and tighten idlers as necessary. Check slack at

spring-operated idlers seasonally.

Refer to Figure 23, which, for clarity, greatly exaggerates

slack, and omits the idlers.

1. Measure the span for allowable slack:

Locate the longest span of each chain (usually the

span which does not run through the idlers).

2. Determine the ideal slack:

Long chains (over 36in/91cm):

⁄

in per foot

Vertical short chains:

⁄

in per foot (2.1cm/m)

Horizontal short chains:

⁄

in per foot (4.2cm/m).

3. Measure the current slack :

Acting at a right angle to the chain span at the center

of the span, deﬂect the chain in both directions. The

slack is the distance of the movement.

4. Adjust the idlers for ideal slack.

Chain Clips

Whenever mounting a chain, make sure the clip at the

removable link is oriented to minimize snags.

Refer to Figure 24 (arrow shows chain direction)

Install clip with open end facing away from direction of

chain travel (shown by gray or striped arrows in chain

routing diagrams).

Fertilizer Meter Drive Chain

There are four (4) chains in the fertilizer ground drive

system. See page 51 and page 52 for locations.

Figure 23

Measuring Chain Slack

27264

Figure 24

Chain Clip Orientation

26482