Duff-Norton SK6905-200 - Manual (Page 3)

3
Section I
General Information
1-1. General
This manual provides instructions for the installation, op-
eration and maintenance of the Duff-Norton 3905, 3904,
6905 & 6904 Series DC electromechanical actuator. It in-
cludes proper procedures for the disassembly, cleaning,
inspection, rebuilding and assembly of the actuator. To
ensure efficient, long, satisfactory use of this unit, these
instructions should be followed closely.
1-2. Industrial Use Only
The 3905, 3904, 6905 & 6904 Series actuators described
and illustrated in this manual are intended for industrial
use only and should not be used to lift, support or other-
wise transport people, unless you have a written statement
from Duff-Norton which authorizes this actuator unit, as
used in your application, as suitable for moving people.
1-3. Factory Preparation
Each actuator is carefully assembled and tested at the
factory to ensure that the motor and the mechanical com-
ponents will function properly and that the actuator will lift
its rated load.
The brake is preset at the factory and no further adjust-
ment is required. With proper maintenance, this brake
prevents the actuator from self-lowering.
The actuator is prelubricated at the factory and thus re-
quires minimum maintenance.
Limit switches are checked at the factory for proper func-
tioning.
The motor current draw is checked to make certain that it
is within Duff-Norton standards.
Every effort has been made to deliver this unit in its fac-
tory-approved state. You should, however, carefully inspect
the actuator for damage that may have occurred during
transit.
1-4. Warranty and Warranty Repair
Subject to the conditions stated herein, Duff-Norton will
repair or replace, without charge, any parts proven to Duff-
Norton's satisfaction to have been defective in material
and workmanship. Claims must be made within one year
after date of shipment. Duff-Norton will not repair or re-
place any parts that become inoperative because of
improper maintenance, eccentric loading, overloading,
chemical or abrasive action, excessive heat, or other
abuse.
Equipment and accessories not of Duff-Norton's manu-
facture are warranted only to the extent that they are
warranted by their manufacturer, and only if the claimed
defect arose during normal use, applications and service.
Equipment which has been altered or modified by anyone
without Duff-Norton's authorization is not warranted by
Duff-Norton. EXCEPT AS STATED HEREIN, DUFF-
NORTON MAKES NO OTHER WARRANTIES, EXPRESS
OR IMPLIED, INCLUDING WARRANTIES OF MER-
CHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE.
If you have any questions concerning warranty repair,
please contact Duff-Norton.
Authorization for return must be received from Duff-Norton
before returning any equipment for inspection or warranty
repair.