Great Plains 2SNT30 Assembly Instructions - Manual (Page 14)

4/8/04 1-
MAINTENANCE AND LUBRICATION
BREAKAWAY PROTECTION
The 3 outer sections of the marker are attached to the first section by a hinge pin and a breakaway bolt. The bolt is
designed to pull apart if the outer sections contact an obstruction while using the drill.
NOTE: The breakaway bolt is a 7/16"-14 x 2" long - grade 2 (G.P. # 802-353C). It is identified as a grade 2 by having
no marks on the head. If it breaks, it must be replaced by an equivalent grade 2 bolt to prevent marker damage. See
Fig. 11.
11147
GRADE 5
DO NOT USE
GRADE 2
USE FOR BREAKAWAY
PROTECTION
Fig. 11
LUBRICATION
HINGES
Each hinge on the marker requires greasing every 20-25 hours of operation. A grease fitting is located on the hinge
tube at the base end of each section.
DISK BEARINGS
The tapered roller bearings in the disk hub are lubricated at the factory. Under normal conditions, the bearings need to
be repacked every 2 to 3 years. If the grease seal or grease cap becomes damaged or is missing, the hub should be
disassembled, cleaned and bearings repacked. A new seal or grease cap should be installed.
MARKER TRANSPORTING
Always transport the marker with it folded in the flat fold position. Make sure the second marker section(s) rests securely
on the transport carrier(s).