SERIES 41 AND 81 MODUTROL IV™ MOTORS
5 63-2187—3
Mounting
Use the following guidelines for proper motor mounting:
• Always install motors with the crankshaft horizontal.
• Mounting flanges extending from motor housing base are
drilled for 6.4 mm machine screws or bolts.
• Motors are shipped from the factory in their normal position:
— Normally closed models are shipped at the counter-
clockwise rotation limit (viewed from the power end).
— Normally open models are shipped at the clockwise
rotation limit, (viewed from the power end).
NOTE: Refer to Fig. 2 for graphical representation of
fully-open and fully-closed positions.
Fig. 2. Motor shaft positions at stroke limits
(viewed from power end).

Adapter Bracket

The 220738A Adapter Bracket, positioned between the motor
and the equipment, raises motor shaft height by 19 mm to
match that of previous Modutrol® Motor models.
The following applications require this bracket:
• Q607 External Auxiliary Switch.
• Damper linkage applications require added clearance to
allow:
— Crank arm rotation through the downward position.
— Sufficient damper linkage to reach the motor shaft.
• All valve linkages except the Q5001.
NOTE: When the bracket is not used in a replacement
application, the damper linkage can require
adjustment for the new shaft position.
To mount the motor with the bracket:
1. Mount the bracket to the equipment with existing or
standard bolts.
2. Using the provided bolts, mount the motor to the bracket
threaded holes. See Fig. 3.
For valve linkage applications (other than the Q5001):
1. Mount the bracket to the linkage.
2. Position the motor on the bracket to align the motor
shaft with the linkage.
3. Attach the motor to the bracket with the four bolts
(provided).
NOTE: The bolts go through the motor flange holes
and into the threaded holes of the bracket.
Fig. 3. Mounting the motor with an adapter bracket.
FULLY
OPEN
FULLY
CLOSED
VERTICAL
REFERENCE
10
90
90 DEGREE STROKE
FULLY
OPEN
FULLY
CLOSED
VERTICAL
REFERENCE
10
160
160 DEGREE STROKE
M17712
EQUIPMENT
BASE
ADAPTER
BRACKET
STANDARD
BOLTS (4)
MOTOR
BOLTS
PROVIDED (4)
No. 12 OR 1/4 in. ZINC PLATED
MACHINE SCREWS OR BOLTS
1
1
POWER END
POWER END
M17715
WIRING BOX