Great Plains PH-20 Predelivery Manual - Manual (Page 18)

16
Section 3 Setup
PFH-15 and PFH-20 Precision Fertilizer Hitch 148-365Q 2/20/2006
Great Plains Mfg., Inc.
This section covers hooking the hitch to the tractor and
drill, hooking the hydraulic hoses to the tractor, and bleed-
ing the hitch hydraulics.
Hooking Hitch to Tractor
!
DANGER!
You may be severely injured or killed by being crushed between
the tractor and hitch. Do not stand or place any part of your
body between hitch and moving tractor. Stop tractor engine and
set park brake before installing the hitch pin.
1. Place hitch weldment (1) over ball swivel (2) on hitch
tongue. Hold hitch weldment in place by inserting
spacer tube (3) through hitch clevis and ball swivel.
2. Back tractor up to hitch and bolt hitch weldment to
tractor drawbar using 1-by-10-inch bolt (4), large flat
washer (5), lock washer (6), and nut (7).
3. Use 3/4-by-9-inch bolt (8) to bolt hitch weldment
through its slotted hole and onto secondary hole of
tractor drawbar. Install a 3/4-inch flat washer (9) next
to top slotted hole and fasten with a lock washer (10)
and nut (11). Tighten both bolts.
Figure 3-1
Drawbar Assembly Illustration
4. Securely attach safety chain to frame of tractor draw-
bar.
17215
5. Remove jack from stob on side of hitch tongue and
place in transport position on frame brace. See Figure
3-2.
Figure 3-2
Jack in Transport
Bleeding Air from Hydraulics
!
WARNING!
Escaping fluid under pressure can have sufficient force to pene-
trate the skin. Check all hydraulic lines and hoses before apply-
ing pressure. Fluid escaping from a very small hole can be
almost invisible. Use paper or cardboard, not body parts, to
check for suspected leaks. If injured, seek medical assistance
from a doctor that is familiar with this kind of injury. Foreign
fluids in the tissue must be surgically removed within a few
hours or gangrene will result.
The hydraulics must be bled of air before hitch operation.
If the hydraulics are not bled, the cylinders will move with
jerky, uneven motions.
Bleeding Tongue Cylinder
1.
Check hydraulic fluid in tractor reservoir and fill to
proper level. Add fluid to system as needed. Tongue
cylinder capacity is one-half gallon (1.89 liters).
2. Raise and safely support hitch, transport frame and
front tongue.
3. Unpin rod end of tongue cylinder. Block, wire or other-
wise safely support cylinder so when rod end is fully
extended it does not contact anything.
4. Cycle cylinder completely in and out at least three
times to purge air from cylinder and hoses.
5. Fully extend cylinder and repin rod end.
6. Recheck tractor reservoir and fill to proper level.
Bleeding Transport Lift Cylinders
1.
Check hydraulic fluid in tractor reservoir and fill to
proper level. Add fluid to system as needed. Cylinder
capacity is about 2 gallons (7.57 liters).
2. Jack up and support hitch frame.
3. Unpin rod ends of cylinders. Block, wire or otherwise
safely support cylinders so when rod ends are fully ex-
tended they do not contact anything.
12083
Section 3
Setup