Great-plains 2525P Operator Manual User Manual download pdf (Page 60)

56 2020P/2025P and 2520P/2525P Great Plains Manufacturing, Inc.

118-231M 2013-05-10

Marker Maintenance

High Pressure Fluid Hazard:

Escaping ﬂuid under pressure can have sufﬁcient pressure to

penetrate the skin. Check all hydraulic lines and ﬁttings

before applying pressure. Fluid escaping from a very small

hole can be almost invisible. Use paper or cardboard, not

body parts, and wear heavy gloves to check for suspected

leaks. If injured, seek medical assistance from a doctor that is

familiar with this type of injury.

Marker Cylinder Bleeding

Refer to Figure 69

Always bleed at a JIC or NPT ﬁtting.

Never bleed an O-Ring Boss (ORB) ﬁtting.

1. Begin with drill lowered, and with both marker sides

extended. For sequenced markers, see “Both Sides

Unfolded (with Sequence Valve)” on page 21.

2. Note the position of the cylinder stop.

3. Un-pin the rod end of the marker cylinders, and ori-

ent the cylinders so that the rods may extend with-

out striking marker components.

4. Loosen the JIC ﬁtting at the base end of one

marker cylinder.

5. Extend the circuit until ﬂuid appears at the loosened

ﬁttings. It may be necessary to

extend-retract-extend to cycle the sequence valve to

that marker. Set circuit to Neutral. Secure ﬁttings.

6. Loosen the JIC ﬁtting at the rod end of that same

marker cylinder.

7. Retract the circuit until ﬂuid appears at the loosened

ﬁttings. Set circuit to Neutral. Secure ﬁttings.

8. Repeat for the other side.

9. Re-orient cylinder stop to position noted at step 2.

10. Re-pin marker rod ends.

Figure 69

Marker Bleed

17643

26222

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Great-plains 2525P Operator Manual User Manual Page 60