McElroy Pit Bull 250, Руководство оператора

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7 - 4
Maintenance
Bleeding Air From Hydraulic System
The two carriage cylinders have air bleed screws and must be
bled if the system ever runs low on oil or leaks air on inlet side
of pump. Air in the system is indicated when carriage movement
becomes jerky and erratic. To bleed the system, proceed as
follows:
Remove upper jaws & clamping eye bolts from the two movable
clamp jaws to expose the bleed plugs recessed in top of the
lower jaws.
Tilt machine so the fixed jaw end is higher than the opposite end.
Shift the directional control and move the carriage to the fixed
jaw end. Adjust the pressure to approximately 50-100 psi (345-
690 kPa) before proceeding.
Loosen the bleed plug on one cylinder next to the fixed jaw.
Hold pressure on the cylinder until no air is indicated and quickly
tighten the plug.
Repeat this operation on the opposite cylinder.
Tilt the machine so the opposite end is higher than the fixed jaw
end. Move the carriage to the end opposite the fixed jaw and
repeat the above procedure on the this end of the cylinders.
Installing Butt Fusion Heater Plates
Coated butt fusion heater plates are available for all non-coated
heaters.
Butt fusion heater plates are installed with stainless steel cap screws.
Install butt fusion heater plates while the heater is cool.
Care should be taken to assure that the butt fusion heater plates are
seated on the heater body, and that there is no foreign matter trapped
between these surfaces.
IMPORTANT: Do not over tighten the bolts.
The surface of the butt fusion heater plates are coated with an antistick coating.
TX02716-11-30-10
PH019
91-11-15-00
TX00427-9-15-94
PH019
92
-11-15-00
PH019
94
-11-15-00
PH019
93-11-15-00
28, 250, 500
28, 250, 500
412 and 618 412 and 618
PH
02
33
3-
7-0
8-0
2