Great Plains 2000 Operator Manual - Manual (Page 33)

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Section 5 Maintenance and Lubrication
12, 15 and 20 Foot Series Three-Point Drills 118-389M-A 2012-03-27
Great Plains Mfg., Inc.
Gauge-Wheel-Arm Pivots
Type of Lubrication: Grease
15
12115
12167
Speed-Change Box
The speed-change gearbox is lubricated and sealed at the
factory. Under normal conditions, it does not require main-
tenance or lubrication.
If you open the gearbox for repair, repack all gears and
around the shaft bearings with least 7 ounces (198.45 g)
of gear lubrication (Great Plains part number 788067).
It is important to keep moisture and dirt out of the gearbox.
Inspect the rubber seals on the gearbox drive and shifter
shafts. Replace seals if necessary.
Before bolting gearbox together, spread a very thin coat of
anaerobic sealant on mating surfaces of gear case.
IMPORTANT: Use sealant sparingly. Excess sealant
may lock bearings or gears.