Great Plains 2S-2600HDF Operator Manual v2 - Manual (Page 91)

Great Plains Manufacturing, Inc. Table of Contents Index Maintenance and Lubrication 87
2014-02-03 Table of Contents Index 195-069M
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.
Chain Slack
Check slack within the first 8 hours of operation and
tighten idlers as necessary.
Refer to Figure 89, 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 1cm is appropriate for a 30cm 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 lbs (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 90
Install clip with open end facing away from direction of
chain travel (shown by gray arrows in chain routing dia-
grams).
Marker Maintenance
Marker Transport Carrier
When marker is folded, the second section should be
centered in transport carrier saddle and be parallel with
top of drill box.
Refer to Figure 91
To adjust height of saddle, loosen 1 ⁄
2
x2in U-bolts that
hold carrier tube to mounting bracket. Slide carrier tube
up or down as needed.
Figure 89
Measuring Chain Slack
27264
2
1
1
Figure 90
Chain Clip Orientation
26482
2
Figure 91
Marker Transport Carrier
15632
1
1