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Section 4: Options
HD25 and HD35 Hydraulic Post Hole Diggers 317-076M
7/31/17
Rock Augers (Option)
Refer to Figure 4-5:
Bolt-on Rock Heads (Accessory)
Refer to Figure 4-6:
The HD25 and HD35 Dirt Augers can be converted to
Rock Augers with this accessory. Remove existing dirt
auger teeth and point. Attach rock head (#1) to the auger
with 1/2"-13 GR5 bolt (#2) and lock nut (#3). Clamp rock
head to the auger’s spiral flighting with wear caps (#4 &
#5), 1/2"-13 GR5 bolts (#6), and lock nuts (#3). Tighten
lock nuts (#3) to the correct torque.
Rock Auger Teeth
Refer to Figure 4-7:
PD/HD Rock Augers
Part No.
Part Description
317-258A
PD 6" Rock Auger Assembly
317-259A
PD 9" Rock Auger Assembly
317-260A
PD 12" Rock Auger Assembly
317-261A
PD 15" Rock Auger Assembly
317-262A
PD 18" Rock Auger Assembly
Bolt-on Rock Heads
Part No.
Part Description
317-274A
SA 6" Bolt-on Rock Head Assembly
317-275A
SA 9" Bolt-on Rock Head Assembly
317-276A
SA 12" Bolt-on Rock Head Assembly
317-277A
SA 15" Bolt-on Rock Head Assembly
317-278A
SA 18" Bolt-on Rock Head Assembly
317-279A
SA 24" Bolt-on Rock Head Assembly
Rock Auger Teeth
Part No.
Part Description
820-695C Belltec Auger Tooth (For Rock Augers)
820-713C Pengo Rock Auger Tooth (Bolt-on Rock Heads)
PD/HD Rock Augers
Figure 4-5
Bolt-on Rock Heads (12"Assembly Shown)
Figure 4-6
Rock Auger Teeth
Figure 4-7
70138
70132
4
6
3
1
2
3
5
820-695C
Bolt-on Rock Head Tooth
Rock Auger Tooth
820-713C