Great Plains 3P1006NT Operator Manual - Manual (Page 52)

48 3P1006NT Table of Contents Index Great Plains Manufacturing, Inc.
151-144M Table of Contents Index 2011-12-20
Chain Maintenance
Initially check the drive chains after the first 10 hours of
drill use. The slack of new chains tends to increase
during the first few hours of operation due to seating.
Thereafter, check the chains every 100 hours.
Lubricate chains any time there is a chance of moisture,
and when being stored at the end of the planting season.
Chain Slack
Refer to Figure 41, 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 36 in. / 91cm):
1 ⁄
4
in. per ft. (21 mm/m)
Vertical short chains:
1 ⁄
4
in. per ft. (21 mm/m)
Horizontal short chains:
1 ⁄
2
in. per ft. (42 mm/m)
3. Measure the current slack :
Acting at a right angle to the chain span at the centre
of the span, deflect the chain in both directions. The
slack is the distance of the movement.
4. 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 42 (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).
Seed Flap Replacement
Current Drill Model Flap
Refer to Figure 43
To replace a seed flap
, use needle nose pliers or
similar tool to grasp “T” top of flap. Pull upward to remove
flap from metal bracket
.
Push new seed flap down through metal bracket
until flap snaps into place with “T” top resting on top of
bracket.
If a seed firmer is also installed, it may be necessary to
shorten the flap.
Figure 41
Measuring Chain Slack
27264
2
1
1
Figure 42
Chain Clip Orientation
26482
2
Figure 43
Seed Tube Flap
31047
2
1
1
2
1 2