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:
For the 28 and 250 machines:
Remove upper jaws and clamping eye bolts from the two movable
clamp jaws to expose the bleed plugs recessed in top of the lower
jaws.
For the 412 machines:
The bleed screws are on the ends of the rod glands.
Tilt machine so the fixed jaw end is higher than the opposite end.
Move the carriage control valve to close carriage, and move the
carriage to the fixed jaw end.
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.
TX02975-4-15-09
PH
03
87
2-
4-15-0
9
Maintenance
6 - 5
Heater Indicator Light
The heater has a green indicator light which will flash on and off. This
indicates that the controller is operating normally. If the green indicator
is not flashing then the controller may not be operating properly. If this
occurs, disconnect power and have the heater repaired by an McElroy
Authorized Service Center.
The heater has a red indicator light on the handle at the bottom of the
temperature scale. When the heater is plugged in and preheating the
light glows steadily until the set temperature is reached. The light then
goes off and on slowly as the heater maintains temperature.
If the heater is not operating properly, the control will attempt to turn
the heater off and the indicator light will flash rapidly. If this occurs,
disconnect the power and take it to a McElroy Authorized Service
Center for repair.
TX02213-09-16-03
PH
02
31
4-
4-
24
-02
PH
02
571-0
9-16
-0
3
Summary of Contents for DynaMc 250HP
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