Section 1: Assembly & Set-up
DH3510 & DH3512 Disc Harrow 322-251M
12/7/18
13
Disc Gang Positioning
Refer to Figure 1-7 & Figure 1-8:
You must know the Disc Harrow model number and
distance between disc blades (7 1/2" or 9") to position
disc gangs on the swing arms correctly.
1.
Measure distance between disc blades. Use this
measurement to find dimensions A & B in the
below. Dimensions A & B are
the distances from end of swing arms to end of the
first inside mounting bracket flange (#1).
2. Make a pencil mark (Dimensions A & B) on the swing
arm where the end of the mounting bracket flange
begins.
3. Move disc gang along the length of the swing arm
until end of inside mounting bracket flange is aligned
with the pencil mark made on the swing arm.
Rear Gang Position on Swing Arms (Right Side Shown)
Figure 1-7
Front Gang Position on Swing Arms (Right Side Shown)
Figure 1-8
Positioning Chart
Distance
From End of Swing Arm to End
of Mounting Bracket Flange
Model DH3510
Disc Spacing
Model DH3512
Disc Spacing
7 1/2"
9"
7 1/2"
9"
A
7 1/16"
7 5/8"
6 15/16"
7 1/2"
B
8 7/8"
9 1/2"
8 7/16"
9 1/16"
26523
Pencil
Mark
26523
Pencil Mark
4. Tighten the short u-bolt (#6) for the inside mounting
bracket (#1) to 170 ft-lbs. Do not attach nuts (#3A) to
the long u-bolts.
5. Move out to the next mounting bracket. Align this
bracket vertically and then tighten short u-bolt to
170 ft-lbs.
6. Continue moving out while aligning the mounting
brackets vertically and then tightening the short
u-bolts until all brackets have been secured.
7.
Refer to
page 18 if optional disc scrapers are included. Skip to
step 8 if they are not included.
8. Install two flat washers (#4) and 3/4" hex flange top
locknuts (#3A) to each leg of the long u-bolts (#5).
Tighten nuts to 170 ft-lbs.
IMPORTANT:
Make sure all mounting bracket legs
are vertical before tightening short u-bolts. This will
ensure that the long u-bolts are spaced properly
when mounting scraper channels.
