
Great Plains | 411-633M | 10/21/2021
62
PL5500 Planter
Maintenance
Check chain slack at fixed idlers within the first 8
hours of operation. Tighten idlers as necessary.
Check chain slack at spring
-
operated idlers
seasonally, and tighten idlers as needed.
1. Measure the span (1) 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:
3. Measure the current slack (2):
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 positioned to minimize snags.
Install the clip with the open end facing away from the
direction of chain travel.
Meter Drive Chain
When performing seasonal checks, lower the planter
to put the chain at minimum idler spring tension.
Lift the spring off the idler assembly. Check that the
idler pivots freely. Re
-
attach the spring.
Markers
Equipment Damage Risk
Replacing the shear bolt with a higher grade bolt
can result in marker damage.
Shear Bolt Replacement
The marker arm is attached to the marker body with
a 3/8 x 4 inch Grade 5 shear bolt. If the shear bolt
breaks, replace with Great Plains part number
802-223C or equivalent.
Do not replace the shear bolt with a lower
grade bolt, or smaller bolt, or you may
experience nuisance shears.
Marker Disk Lubrication
Inspect the marker disk hub seasonally. If the grease
seal cap (1) for the marker disk hub bearings is
damaged or missing, disassemble and clean the
hub. Repack with grease and install a new seal or
grease cap.
Chain Type
Chain Slack
Long chains over 36 in. (91 cm)
1/4 in/ft (2.1 cm/m)
Vertical short chains
1/4 in/ft (2.1 cm/m)
Horizontal short chains
1/2 in/ft (4.2 cm/m)
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