Operating Instructions, Form No. 1000090, Back sheet 3 of 6
Draining And Flushing The Reservoir
IMPORTANT: Clean the pump exterior before the
pump interior is removed from the reservoir.
1. Remove the ten screws fastening the motor and
pump assembly to the reservoir.
IMPORTANT: Do
not damage the gasket or bump the filter or
pressure regulating valves when lifting the pump
and motor off the reservoir. See Figure 2.
2. Clean the inside of the reservoir and fill with a
suitable flushing oil. Rinse the filter clean.
3. Place the pump and motor assembly back onto the
reservoir, and secure with two machine screws
assembled on opposite corners of the housing.
IMPORTANT: The hydraulic flow control valve must
be in the neutral position for the following step. If
the pump is equipped with a valve that has only an
advance or retract position, place the valve in the
advance position, and connect a hose to the
advance port on the valve. Place the other end of
the hose into the oil filler plug hole.
4. Run the pump for several minutes. Then disconnect the motor and pump assembly, and drain and clean the
inside of the reservoir.
5. Fill the reservoir with an approved, high-grade hydraulic oil. Place the pump and motor assembly (with gasket) on
the reservoir, and thread the ten screws. Tighten securely and evenly.
Adding Oil To The Reservoir
1. Wrench must be fully retracted and the power supply disconnected when adding oil to the reservoir.
2. Clean the entire area around the filler plug before removing the filler plug.
3. Use a clean funnel with filter when adding oil.
4. Use an approved, high-grade hydraulic oil (215 SSU @ 100° F) only.
Sound Reduction
The electrically-powered hydraulic pump operates in the 90-95 dBA range. If further sound reduction is desirable, any
of the following options will help reduce the sound level.
1. Install a pressure switch. It shuts the motor off automatically when maximum pressure is reached (holding cycle).
2. Use a 3450 RPM, 1-1/2 horsepower, 115 VAC, 60 Hz, 1-phase pumping unit.
3. Use a 3450 RPM, 1-1/2 horsepower, 230 VAC, 60 Hz, 3-phase pumping unit.
4. Install casters (two gallon reservoir only) to reduce the noise level.
Checking Brushes On Universal Motors
To help prevent premature failure of the armature,
check the brushes periodically:
1. Remove the metal brush cover plates.
2. Remove the brush holder caps and brush assemblies
3. The brush assemblies must be replaced if they are 1/8" long or less.
See Figure 3.
4. Install brush assemblies, brush holder caps, and metal brush cover plates.
FIGURE 2
FIGURE 3
7/8"
(new)
Replace when
1/8" lg. or less
