Warner Electric EUM-50_EUM-100_EUM-180_EUM-210_EUM-215 - Manual (Page 8)

8 Warner Electric • 800-825-9050 P-226 • 819-0355
Pre-BurnishingandMaintenance
Pre-Burnishing
All Warner Electric UniModules are pre-burnished
before leaving the factory and are designed to pull
full torque as shipped. Like all friction based
products, their consistency will improve after a
short break-in period.
Maintenance
As with any friction-type device, some initial care
should be given to wear rate, as minor
adjustments in actuation time can sometimes
extend the life of the unit.
The exploded views and drawing illustrate and
describe the various components in each
Electro-Module.
Wear Pattern
Wear grooves appear on the friction surfaces.
This is a normal wear condition, and does not
impair functioning of the unit. Never machine the
friction surfaces to remove grooves or score
marks resulting from normal wear.
Heat
Excessive heat and high operating temperatures
are causes of rapid wear. Units, therefore, should
be ventilated as efficiently as possible, especially if
the application requires fast, repetitive cycle
operation.
Foreign Materials
Do not spray internal friction surfaces with oil.
EUMs will withstand humid, wet environments.
The washdown version is able to withstand high
pressure wash applications.
Torque Loss
If a brake or clutch module slips or loses torque
completely, the initial check should be the input
voltage to the magnet or field as follows:
90-Volt: Connect a DC voltmeter with a range of
0-100 volt directly across the magnet or field
terminals. With the power on and the
potentiometer turned up, a normal reading is 90
volts, although 85 to 95 is satisfactory. The
reading should drop as the potentiometer
control is adjusted counterclockwise.
6-Volt: Use a DC voltmeter of approximately 0-15
volt range. A normal reading is from 5.5 to 6.5
volts, depending on the power supply.
The above checks normally are sufficient. Further
checks may be made as follows: a low range
ammeter, when connected in series with one
magnet lead, will normally indicate 0.2 to .35
amperes for the 90 volt units and 3.0 to 4.5 for
the 6 volt series. These readings are with the
power on and the potentiometer control in the
maximum position.
Ohmmeter checks should be made with the
power off and the circuit open. (To be certain,
disconnect one lead to the magnet.) Compare
resistance to the data on page 8.
If the above checks indicate that the proper
voltage and current is being supplied to the coil,
mechanical parts should be checked to assure
that they are in good operating condition and
properly installed.