2076 NORTHWOODS DR
MUSKEGON, MI 49442
PHONE (231) 788-7025
FAX (231) 788-7030
www.dynatorque.com
ISO 9001:2008 CERTIFIED
Page 3 of 7
IOMSRD
IOM FOR DYNATORQUE™ SPRING RETURN MANUAL OVERRIDE (SRD TYPE)
Revised: 4-15-11
Step 4.
Rotate the SRD input shaft CCW until the key
in the drive coupling comes into contact with the end of
the key slot and the coupling just begins to turn. (Ref
Photo 2). Upon contact, reverse the SRD input shaft ½
to ¾ of a turn to disengage the drive coupling key from
the worm wheel. This will put a very small opening
between the key slot and the drive coupling key. This is
the SRD unit’s
Home Position.
(Ref Photo 3)
Step 5.
Set the SRD travel stop for the closed position (Home
Position) by turning the bolt clockwise until the bolt comes into
contact with the end of the worm wheel. Reverse the bolt ½
turn to ensure that the SRD travel stop is not used as the
primary seating element for the pneumatic actuator. Tighten
the lock/jam nut against the body of the override. (Note: If the
SRD override has been optionally equipped with the Home
Position Indicating Stop Bolt, the indicating head will be
extended to indicate the SRD override is in the “Home
Position”.
Step 6.
Reposition the valve to the full open position using the
pneumatic actuator. (Note: There should be no interruption of
the 90 degree strike of the valve by the SRD or any other
component. If there is an interruption, identify the problem and
make the necessary corrections.) Set the
pneumatic actuator
travel stop for the full valve and actuator open position. (Ref.
Photo 5)
