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26
Section 4: Options
HD25 and HD35 Hydraulic Post Hole Diggers 317-076M
7/31/17
Refer to Figure 4-10:
4.
Insert spacer (#1) into hole in down pressure cylinder
plate (#5) located on the left side of Post Hole Digger.
5.
Place left side cylinder plate with spacer back into pin
position. Make sure bushing tube at the top is
pointing inward as shown.
6.
Push pin (#3) in until pin projects through spacer (#1)
and out through yoke mounting bracket on the left
side.
7.
Repeat steps 3 to 6 for the right side spacer and
down pressure cylinder plate (#4).
8.
Install spacer (#6) between cylinder plates (#4 & 5).
9.
Insert bolt (#7) through cylinder plates (#4 & 5) and
spacer (#6). Draw nut up snugly, do not tighten.
Refer to Figure 4-11:
10. Attach cylinder (#9) between cylinder
plates (#1 & #2) with pin (#8). Insert both cotter
pins (#7) into pin (#8) and bend one or more legs to
prevent pin from falling out.
11. Torque 1/2" x 5 1/2" bolt (#5) to 76 ft-lbs.
12. Attach clamp plates (#3) to digger boom with
1/2"-13 x 2 1/4" GR5 bolts (#4) and lock nuts (#6).
Thread nuts only one or two full turns to allow for
easier attachment of down pressure cylinder (#9). Do
not tighten nuts (#6) until step 6 on page 27.
13. Fully retract hydraulic cylinder (#9) and connect
cylinder to clamp plates with cylinder pin (#11).
Secure pin with hairpin clip (#10).
Cylinder Plate Installation
Figure 4-10
Cylinder Clamp Plate Installation
Figure 4-11
26827
Bushing Tubes
Yoke Mounting
Bracket
26828