Great-plains PH-20 Operator Manual Manuel d'utilisateur télécharger pdf (Page 11)

Section 1 Preparation and Setup

12/29/2011

PH-15, PH-20, PFH-15 and PFH-20 Precision Fertilizer Hitch 148-365M

Great Plains Mfg., Inc.

Bleeding Air from Hydraulics

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.

You could be severely injured or killed by being crushed under

the falling implement. Always have transport locks in place and

frame sufﬁciently blocked up when working on implement.

The hydraulics must be bled of air before hitch operation.

If the hydraulics are not bled, the cylinders will move with

jerky, uneven motions. The hydraulics should be bled dur-

ing initial hitch setup. If the hydraulics have not be bled, or

if you replace a hydraulic component during the life of the

drill, follow these procedures.

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.

4. Cycle cylinders in and out completely at least three

times to purge air from cylinders and hoses.

5. Fully extend cylinders and repin rod ends.

6. Recheck tractor reservoir and ﬁll to proper level.

Hooking Hitch to Drill

You may be severely injured or killed by being crushed between

the hitch and drill. Do not stand or place any part of your body

between the drill and moving hitch. Stop tractor engine and set

park brake before installing hitch pins.

This hitch could have negative tongue weight when hitched to a

three-point drill in the raised position. Negative tongue weight

will cause the unsecured hitch tongue to raise suddenly and

could cause injury or death. Always lower drill before unhook-

ing hitch from tractor.

1. Place hitch extension (1) between top hitch plates on

drill. Bolt hitch extension in place as shown in Figure

1-3 using two 1-by-5 1/2-inch bolts (2), lock washers

(3) and hex nuts (4).

Figure 1-3

Top Hitch Extension

2. Move transport-lock handle to ﬁeld position. See Fig-

ure 1-4.

Figure 1-4

Transport-Lock Handle in Field Position

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Great-plains PH-20 Operator Manual Manuel d'utilisateur Page 11

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