Installation and Operational Instructions for
EAS
®
-dutytorque Type 404_._ _400
Sizes 2
– 9
(B.4.3.1.ATEX.EN)
06/10/2016 TK/GH/SU
Chr. Mayr GmbH + Co. KG
Eichenstraße 1, D-87665 Mauerstetten, Germany
Tel.: +49 8341 804-0, Fax: +49 8341 804-421
Page 13 of 15
Guidelines and Directives for Operation in
Areas Where There is a Danger of Explosion
Initial Operation
If no stipulations regarding lacquering or other surface
treatments have been made customer-side on order, the clutch
surface is protected by a zinc-phosphate coating. The clutch
must only be used in areas protected from the weather.
Additional corrosion protection is required for use in the open air
or if the device is subject to weather conditions. Severely
corroded clutch components mean a danger of ignition.
The functional components of the clutch must not be stuck
together due to paint coatings or other sticky media, and
electrostatic charges must not be caused (see EN 13463-1 7.4).
A functional inspection must be carried out before initial
operation.
The penetration of dirt or dust influences the grease condition of
the clutch and therefore its lifetime. Organic dust binds the
grease filling and the lubrication qualities of the grease are lost.
The clutch must be axially secured onto the shaft. Correct
securement must be checked before initial operation.
Overload clutches are rotating parts, which can cause danger of
injury due to striking foreign bodies or can cause danger of
ignition, should they not be secured properly by a cover. The
user is responsible for providing covers for these parts (we
recommend rustproof steel). The minimum distance of 5 mm
must be observed. The covers must not be made of aluminium.
The respective guidelines and standards must be observed.
Operation in dust layers or in piles of dust is not permitted.
Modifications of the clutch are not permitted.
Maintenance and Inspection Intervals for
Clutches in
Areas Where There is a Danger
of Explosion
Re-greasing the overload elements (6) via the cone
lubricating nipples (17) and the bearings via the cone
lubricating nipples (18) at least every 20 overload
occurrences or 1x per year, with approx. 3
– 4 thrusts of
grease (approx. 5 ccm) from a grease gun.
Maintenance work, which should be carried out after 1000
disengagements or at the latest after 1 year, includes:
Visual inspection
Functional inspection
Inspection of the shaft-hub connection
Inspection of the screw tightening torques
The specified tightening torques (see Technical Data /
pages 5 and 6) must be maintained.
Inspection of the set torque
Clutch release inspection
Bearing or bearing pre-tension inspection
Re-greasing of the bearings via the
cone lubricating nipples (18), 2 x 180° offset on the
element flange (3), see Fig. 2.
Re-greasing of the contact components of the overload
elements (6) and the thrust pieces (8) via the cone
lubricating nipple (17), 2
– 4 times on the element
flange (3), see Fig. 2 (depending on the number of
overload elements (6)).
Clutch re-greasing must only be carried out at the place of
manufacture or by specially trained personnel.
For greasing, please use NLGI Class 1.5 grease with a basic oil
viscosity of 460 mm
2
/s at 40 °C, e.g. Mobilith SHC460.
When re-installing the clutch, please secure all screws with
Loctite 243 (medium hard).
On the clutches, the exact angular position
between the clutch components must be
observed to maintain the balance quality.
On the clutches, the components are therefore
marked and are, on re-installation, to be
screwed together again in the
marked angular
position
to the tightening torque according to
the Technical Data.
If large amounts of dirt or dust are present or in extreme ambient
conditions, it may well be necessary to carry out inspections at
shorter intervals.
We recommend that maintenance work is carried out at the
site of manufacture.
