Great Plains PT8030 V1012 Operator Manual - Manual (Page 47)

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Section 7 Maintenance and Lubrication
PT6030 and PT8030 Pull-Type Planter 401-032M 10/10/12
Great Plains Mfg., Inc.
Section 7
Maintenance and Lubrication
Install Cylinder Stops
!
CAUTION!
Always install cylinder stops when working around or near
planter.
Refer to Figure 7-1:
Raise planter to transport position with tractor remote cyl-
inder operating lever. Pivot cylinder stop into position on
wheel module cylinder rods. Lower to stop.
NOTE: Cylinder stops are provided for added safety
when performing normal maintenance and adjust-
ments with the planter raised.
Cylinder Stop
Figure 7-1
15042
Replacing Drill Shaft Cotter Pins and
Countershaft Shear Pins
Refer to Figure 7-2:
The cotter shear pins (A), which connect the drill shaft to
the transmission and shear pins (B) which connect coun-
tershaft to transmission, will shear when an excessive
load is put on the drill shaft.
NOTE: If drill shaft binds due to misalignment, loosen
bolts on drill shaft bearings on planting units. Make
certain shaft turns freely and tighten bolts.
If countershaft binds due to misalignment, loosen
bolts on transmission bearings. Make certain shaft
turns freely, then tighten bolts.
Infrequent or improper lubrication causes “binding” of
moving parts within the planter. This “binding” will cause
the cotter shear pins to shear, thus preventing breakage of
planter parts.
If either cotter pin shears, turn the drill shaft by hand to lo-
cate where the binding is occurring. When the drill shaft
can be turned freely by hand, replace the cotter pin.
NOTE: Replace the cotter shear pins only with cotter
shear pins of the same size. Do not replace with oth-
er type pins.
Transmission Cotter Pins & Shear Pins
Figure 7-2
15046
Ratchet Drive (8 Row Only)
Refer to Figure 7-3:
The ratchet assembly must operate freely and the springs
(#1) must bring the dogs (#2) back against the ratchet.
Repack with grease annually.
15177
Ratchet Drive
Figure 7-3