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Speedaire Operating Instructions
Models 4MU10A and 3VB60
Circuit Breaker or
Fused Disconnect
L1
X2
Pressure Switch
Coil
Thermal
Units (3)
T1
Motor
Single Phase
Wiring Diagram
Figure 4 - For Motor Frame Sizes 184T, 215T, 254T or 284T. Refer to Motor
Nameplate
1. Rewire motor per data plate on
motor or instruction sheet.
2. Check electric rating of magnetic
starter and replace thermal overload
elements or magnetic starter as
required. The voltage and amperage
ratings are listed on the motor
nameplate.
DIRECTION OF ROTATION
NOTE: Improper rotation will result in
reduced unit life.
The direction of rotation must be
counterclockwise (as shown by the
arrow on the flywheel) while facing the
flywheel side of the pump. The motor
nameplate will show wiring information
for counterclockwise rotation.
The proper direction is very
important. The direction of rotation
of 3 phase motors can be reversed by
interchanging any two motor-line leads.
For single phase motors, refer to the
motor nameplate
IMPORTANT: Check motor rotation
before operating the compressor.
Circuit Breaker or
L2
Fused Disconnect
Over
Load
Pressure
Switch
T2
Three Phase
Wiring Diagram
Operation
All lubricated compressor pumps
discharge some condensed water
and oil with the compressed air.
Install appropriate water/oil removal
equipment and controls as necessary for
the intended application.
oil removal equipment may result in
damage to machinery or workpiece.
GUARDING
The belt guard provided
must be installed before
operating the unit.
All moving parts must be guarded.
All electrical covers must be installed
before turning on the power.
LUBRICATION
operating compressor, fill crankcase
with compressor oil according to the oil
capacity chart listed in "Replacement
Parts Manual."
Some residual oil may still be in the
pump leaving a thin coat on the sight
glass, however; there is not enough
oil to operate the unit. Add oil only
L1
L2
L3
through the oil fill plug. Pouring oil
into any other orifice will cause oil to
Coil
X2
leak and spray out during operation.
Over
Thermal
Load
Fill to the center of the sight gauge
Units (3)
(see Figure 5). Synthetic oil has proven
T2
T3
T1
to provide superior lubrication and
is recommended for Speedaire air
Motor
compressors. Use 10W30 100% synthetic
oil such as Mobil 1 (Stock No. 4F743).
Single viscosity, ISO100 (SAE 30)
nondetergent compressor oil such as
Mobil Rarus
be used. Both are available at your local
Grainger branch.
Failure to install
appropriate water/
Oil
Fill
Plug
Figure 5 - Oil Fill Diagrams
NOTE: Use of petroleum based
automotive engine oil will cause carbon
THIS UNIT CONTAINS
deposits to build up on the valves. This
NO OIL. Before
will shorten the life expectancy and
will require more frequent service to
the valves. Do not use ATF hydraulic
fluid, two-cycle oil or any oil treatment
product. Do not use diester synthetic oil.
5
(Stock No. 4ZF21), can also
®
Breather Cap
Oil Fill
Full
Low
Sight Gauge
Oil Drain Plug
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