Bush Hog CBH80 - Manual (Page 36)

MODEL CBH80 BACKHOE
ATTACHING KIT INSTRUCTIONS
3-POINT HITCH LINKAGE & HYDRAULIC HOOK-
UP TO TRACTOR HYDRAULIC SYSTEMS
General Description
Mounting and hydraulic kits do not include hoses
which connect the backhoe control valve to the trac-
tor hydraulic system. Additional hydraulic compo-
nents, hoses and /or kits will be required to complete
the hook-up to the tractor hydraulic system. Refer to
the Hydraulic Hook-up section for further informa-
tion. Pumps and reservoir kits are available as
options.
The backhoe is mounted on the tractor lower link
arms and an adjustable upper link is supplied to
replace the tractor upper link. A set of stabilizer arms
is included. They bolt from the adjustable upper link
to the backhoe mainframe, locking the hoe rigidly in
one position.
IMPORTANT: Tractor lower links must be kept
free of lifting forces at all times after installation
of the attaching kit, by keeping tractor quadrant
lever in the lowered position.
IMPORTANT: If the 3-Point Kit is to be used with
a PTO & Reservoir Kit, the Reservoir Tank and
it’s fittings should be installed before proceeding
with the 3-Point installation.
ASSEMBLY
IMPORTANT: Tighten all hardware to the require-
ments specified in the torque chart.
! !
WARNING
To prevent bodily injury, do not operate backhoe
unless Lower Link Weldments (19, 20) are prop-
erly installed and adjusted. Failure to do so may
result in backhoe being thrust upward, crushing
operator against cab or ROPS.
1. Use hoist to raise the backhoe mainframe so
that the boom pivot pin is approximately 16” off
the ground.
2. Back tractor close to the backhoe. Connect trac-
tor lower link arms to lower link mounts using
two L-pins (14), two Cotter Pins (11), and two
Wire Form Cotter Pins (12).
NOTE: If tractor has a category II hitch, install two
Bushings (15) in lower link arms.
3. Attach Upper Braces (18), to backhoe with 3/4 x
7-1/2” Bolt (5), Lockwasher (9), Flat Washers
(10) and Nut (7). Do not tighten hardware at this time.
4. Install Bushing (13) or Bushing (16) in hole of
the Upper Bar (17) that most closely matches
the diameter of the tractor upper link pin. No
bushing is necessary for Category II tractors.
5. Secure Upper Bar (17) between Upper Braces
(18) using 3/4 x 4-1/2” Bolt (3), Flat Washers
(10), Lockwasher (9) and nut (7). Use hoist to
raise or lower backhoe slightly until a hole in the
upper bar aligns with a hole in the upper braces.
6. Attach RH Lower Link Weldment (19) and LH
Lower Link Weldment (20) to backhoe main-
frame using 3/4 x 2-1/2” Bolt (2), Flat Washer
(10), Lockwasher (9), and Nut (7).
7. Align RH and LH Link Weldment (19, 20) with a
hole in the upper bar/brace assembly, as close
to the tractor as possible. Use 3/4 x 6” Bolt (4),
Flat Washer (10), Lockwasher (9), and Nut (7).
You may need to return to Step 6 and readjust
upward or downward the bolt connection.
8. Remove backhoe from the tractor.
9. Install connector plate (21) to RH and LH Lower
Link Weldments (19, 20) using 1/2 x 1-3/4” Bolt
(1), Lockwasher (8), and Nut (6).
10. Tighten all hardware at this time. Check your
installation very carefully to be sure all members
are correctly installed and securely fastened.
11. If using optional PTO Pump and reservoir Kit
proceed to that section prior to remounting the
backhoe onto the tractor.
12. Connect hoses from the backhoe control valve
to the tractor hydraulic system as described in
“Hydraulic Hook-Up” section, prior to remounting
the backhoe onto the tractor.
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