Brawn BGMF100, Operation And Maintenance Manual

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BGMFSB-S
ERIES
O
PERATION
& M
AINTENANCE
M
ANUAL
3389 ~ 128
th
Avenue Holland, MI 49424 Phone: 616/399-5600 Fax 616/399-3084

Copyright 2015 BRAWN Mixer, Inc. www.BRAWNMIXER.com Page 6 of 11
8 /6/2015
AIR MOTORS
If your mixer was supplied with an air motor, certain
precautions must be taken as follows:
1. The mixer was shipped with a needle valve installed
on the motor inlet port. A muffler is provided for
installation at the exhaust port. The function of the
needle valve is to control the motor speed.
2. The air supply must be adequately sized to provide
the proper pressure and volume of clean filtered, dry
air. A pressure regulator followed by an air line
lubricator is required prior to connection to the
needle valve. A combination filter/regulator/lubricator
is commonly used for this purpose. The air line filter
should be capable of 25 micron or better.
3. Blow out the air supply line before connecting to the
motor to remove any dirt or debris in the air line.
4. The exhaust port must not be obstructed such as to
cause a back pressure on the motor. An obstructed
exhaust has an adverse affect on the air motor. This
may also cause the motor shaft seal to fail thus
pressurizing the gearbox and/or mixer drive housing
and causing seal failure.
AIR MOTOR ROTATIONAL
DIRECTION DIAGRAM
MAINTENANCE
Mixers operating in wet environments or exposed to
washdown should be considered severe applications.
Under these conditions water, condensation and
cleaning chemicals may accumulate in the motor or,
from the other end, be blasted under high pressure past
the mixer driveshaft oil seal. Water in the motor may
eventually leak through the motor bearing and into the
gearbox thus contaminating and increasing the volume
of oil. This in turn can cause the gearbox output shaft
seal to fail and leak oil into the mixer housing. Oil in the
mixer housing will eventually find its way through the
bearings and the mixer driveshaft seal and ultimately into
the product being mixed.
To prolong the life of your mixer for these applications, a
preventive maintenance program should be established
and adhered to. The frequency of preventive
maintenance inspections are unique to every application
and must therefore be determined through experience.
Initially, one month intervals are suggested.
The following steps are recommended as part of a
preventive maintenance program:
1. Periodically remove the oil fill plug from the
gearbox (with motor shut off and locked out) and
check the oil level as described under the
heading of LUBRICATION. Also check for the
presence of water in the oil. If water is detected
or if the oil level appears low, proceed with the
following steps.
2. Remove a motor condensation drain plug from
the lowest elevation on the motor and the
conduit box cover to check for water. If present,
separate the motor from the gearbox and inspect
for evidence of water in the motor adapter. If
water exists, the motor should be disassembled
to inspect for water damage to the windings and
bearings.
3. Separate the gearbox from the mixer housing
and inspect the inside of the housing and around
the gearbox output shaft for evidence of leakage.
The inside of the mixer housing should appear
dry.
4. Separate the mixer housing from the mixer
mount and inspect for the presence of water or
oil.
If water has been detected in the motor, the bearings
and seals should be replaced after drying out the motor.