Great Plains 2510HDP Operator Manual - Manual (Page 117)

Great Plains Manufacturing, Inc. Table of Contents Index Maintenance and Lubrication 113
2013-10-21 Table of Contents Index 118-245M
Marker Maintenance
See also:
Setup:
“Marker Chain Adjustment” on page 24
“Marker Extension Setup” on page 25
Adjustments:
“Marker Disk Angle” on page 66
“Marker Extension Adjustment” on page 25
“Marker Speed” on page 66
Marker Shear Bolt
The marker arm is attached to marker body with a shear
bolt
, which is intended to fail if the marker strikes an
obstruction, allowing the marker to swing back around a
second bolt
.
If the shear bolt breaks, replace it with an equivalent bolt,
which is one of:
3 ⁄
18
-16x1 3 ⁄
4
in Grade 2 bolt (Great Plains 802-253C) or
3 ⁄
18
-16x2in Grade 2 bolt (Great Plains 802-266C).
If that size is not available in your local market, substitute
an M10x1.5 Class 5.8 metric bolt and nut.
Note: Replacing the bolt with a lower grade/class, or
smaller size, can result in nuisance shears.
Replacing the bolt with a higher grade/class can result in
marker damage.
Marker Disk Grease Seal
Refer to Figure 122
If grease-seal cap for marker-disk-hub bearings is
damaged or missing, disassemble and clean hub.
Repack with grease and install a new seal or grease cap.
Figure 121
Marker Shear Bolt
15669
2
3 2
3
Figure 122
Marker Bearing and Cap
18795
1
1