Mannesmann Demag MRD 12-3250 Betriebsanleitung Seite 9

Instructions
and maintenance
1 Safety instructions
!
– Please read through these instructions thoroughly before starting the motor and then follow them precisely
during operation.
– Motor and accessories may not be used for other purposes.
– For reasons to do with product liability and operating safety, all changes made to the motor and / or accessories
must be approved by the manu facturer's corresponding technician.
– No liability is assumed for damage caused by failure to comply with the instructions or improper repairs, together
with the use of not original spare parts.
– Subject to modifications in the interest of technical progress.
1.1 Using the motor
– Standard motors may not be used in potentially explosive areas. Please order our information sheet "Explosion-
proof compressed air motors (in accordance with ATEX guidelines for certified motors)" for these areas.
1.2 To avoid injuries and damage, please note:
– Always disconnect the motor from the compressed air pipe before changing the motor adjustments / settings!
– Protect your hands, hair and clothing from getting trapped by rotating parts.
– Use suitable filters or silencers to reduce noise development. Here we recommend various silencers which can be
purchased from us.
2 Instructions and installation
2.1 Air quality and connection conditions
– The motor may only be operated up to a max. flow pressure of 7 bar. Pipe length max. 3 m. Always note the resulting
pressure loss from overlong pipes.
– Always ensure that clean, dry compressed air is used. Provide prescribed air quality as per DIN ISO 8573-1, quality
class 4.
– Use a maintenance unit mounted as close as possible to the motor. Adjust the oil supply quantity to 2 – 3 drops
(1 drop = 15 mm³, types MU / MUB 200 – 600 = 10 drops) per minute. We recommend using an oil spray device or
maintenance unit from MANNESMANN DEMAG.
– Pay attention to the correct inner diameter of the compressed air pipe! Also consult the technical data for the motor.
– Before connecting the motor, the compressed air pipe (hose) should be blown through thoroughly to remove any
possible dirt particles.
– Before connecting the motor, check the water level in your compressed air. Water, corrosion etc. in the pipes can
cause rust in the motor and thus high motor wear or failure.
2.1.1 Lubricants
– As lubricating oil: Resin- and acid-free oil in viscosity class HL 32.
– As lubricating grease: Multi-purpose grease for roller bearings, plain bearings and gears, resin- and acid-free.
NLGI class: 2 | Saponification: Lithium | Drop point: 185° C | Worked penetration: 265 – 295
Applications in the food industry:
– Food oil: Oil that complies to USDA-H1 or FDA 178.3570 viscosity class 32
– Lubricating grease: USDA-H1 or FDA 178.3570, NLGI class: 2 – DIN 51818
2.2
Oil-free motors
In the case of completely dry compressed air without any added oil, the neutral speed may drop depending on the
running time of the motor. However if the compressed air does contain small quantities of oil, the functional capability
is not affected.
2.3
Direction of rotation of the motors
Depending on the motor type, different directions of rotation are possible depending on the connection.
2.3.1 Reversible compressed air motors
type MU (page 02, fig. 1)
The reversible motor has two air connections: L for counter-clockwise and R for clockwise operation. When connecting
up the motor, ensure that the side not subject to pressure is vented. If the motor is used for only one direction of rota-
tion, ensure that the second air connection is not sealed. This would cause the motor to malfunction. For silencing in
this case, we recommend using a silencer available from the manufacturer.
6 MANNESMANN DEMAG