Great Plains 1300 13-Foot Operator Manual - Manual (Page 49)

Great Plains Manufacturing, Inc. Table of Contents Index Maintenance and Lubrication 45
2014-04-15 Table of Contents Index 175-157M
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.
All chains are #40 roller chains.
Chain Slack
Check slack within the first 8 hours of operation and
tighten idlers as necessary.
Refer to Figure 44, 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). The
ideal slack is between 2% and 4% of the span.
For example:
A slack of 1 cm is appropriate for a 30 cm span.
2. 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 with a
force of about 9 pounds (4 kg). The slack is the
distance of the movement.
3. Adjust the idlers for ideal slack.
Whenever mounting a chain, make sure the clip at the
removable link is oriented to minimize snags.
Refer to Figure 45
Install clip with open end facing away from direction of
chain travel (shown by gray arrows in chain routing
diagrams).
2
1
Figure 44
Measuring Chain Slack
27264
1
Figure 45
Chain Clip Orientation
26482
2