Overview
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DynaMc EP Hydraulic Power Unit (HPU)
The DynaMc EP HPU consists of three main hydraulic components:
1. Power pack - Consists of a capacitor start electric motor and gear
pump that are submerged in the fluid reservoir to aid in cooling and
reduce noise.
2. Hydraulic accumulator - Allows the power pack to cycle on and off
to meet the demands of the hydraulic system, which reduces noise and
power consumption.
3. Carriage manifold assembly - Standard McElroy design for familiar
operation and common service parts with other McElroy equipment.
There are two pressure gauges on the HPU. The carriage pressure gauge
above the carriage directional control displays fusion pressure. The
pressure gauge on the rear left side of the HPU displays main system
pressure, which will fluctuate as the power pack cycles on and off.
The main power switch for the HPU is located on the front side of the
electrical box. Next to the power switch is a digital volt meter that displays
incoming voltage to the HPU. On the bottom side of the electrical box is a
motor circuit breaker.
Electric motors are not explosion proof. Operation of
these components in an explosive atmosphere will result in
serious injury or death. Refer to Special Operation - Fusion
in Explosive Atmosphere for safety precautions.
TX04796-05-05-16
CD0115
3-0
3-06
-14
0
100
200
300
400
500
600
700
800
900
1000
DIRECTIONAL
CONTROL
VALVE
FACING
PRESSURE
HEATING
PRESSURE
FUSING
PRESSURE
SELECTOR
VALVE
CD014
34
-11-16
-15
¡PELIGRO!
Carriage Control Box (Acrobat HPU)
Mounted on the top of the HPU is the carriage control box. The
box has controls for the operation of the HPU.
A)
Pressure Selector Control:
Selects one of the three pressure
reducing knobs. The three selectable knobs are Facing,
Heating and Fusing pressure.
B)
Carriage Directional Control:
Three position switch that closes
and opens the carriage and has a neutral position.
C)
Pressure Reducing Knobs:
Use the pressure selector to select
the pressure to use. Use the knob to adjust the selected
pressure.
D)
Power Switch:
Powers the HPU on and off.
E)
Fuses:
Four fuses for machine electrical protection.
TX04795-12-12-16
FUSES
MOTOR
POWER
SUPPLY
CD018
92
-12
-0
7-16
B
A
D
E
C
Summary of Contents for A714201
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