16
Jackshaft (JDC) and Hoist (JHDC)
Operators
Carton Inventory
Your door operator is packaged in one carton which contains the motor unit
and the parts illustrated below. If anything is missing, carefully check the
packing material.
Description
• Powerhead assembly
• Installation manual and caution labels
• Hardware box (includes fasteners)
• Floor level Wall Controller with LCD display to program and setup the door and operator system
• LiftMaster Monitored Entrapment Protection, CPS-U Photoelectric Sensors
• Hoist hand chain (JHDC models only)
• Sash chain (JHDC models only)
• Door/operator drive chain
JDC Operators also include:
• 700 operators - (2) 4.5 AH batteries and battery mounting tray
• 1200 operators - (2) 4.5 AH batteries and battery mounting tray
• 2200 operators - (2) 7 AH batteries and battery mounting tray
NOTE: The new DC logic board includes inputs for CTM (Cable Tension Monitor). Although, not required to operate the
unit, it is highly recommended to include Cable Tension Monitors (part #s: K41-0157-000 and K41-0156-000) in all
Jackshaft installations. The Cable Tension Monitor detects cable slack and will stop and reverse the door.
NOTE: Pusher springs should be used with the door system to help get the door moving in the Close direction. For
certain types of doors, such as standard lift, angled track may also be recommended. Please check with the door
manufacturer for details.
Door Sprockets
Door Sprocket (with setscrew and keyway) will now be sold separately via accessory kits. Please see the guide below for
the correct Door Sprocket kit for your door type and installation.
NOTE: Reference the recommended drum/sprocket conguration on page 4 to help determine sprocket tooth
count.
Kit Number Description Kit Number Description
71-1550B16LGH Sprocket Kit - 16 Tooth, 1" Bore, 1/4"x1/4"
Keyway
71-1550B16QGH Sprocket Kit - 16 Tooth, 1.25" Bore, 1/4"x1/4"
Keyway
71-1550B22LGH Sprocket Kit - 22 Tooth, 1" Bore, 1/4"x1/4"
Keyway
71-1550B22QGH Sprocket Kit - 22 Tooth, 1.25" Bore, 1/4"x1/4"
Keyway
71-1550B32LGH Sprocket Kit - 32 Tooth, 1" Bore, 1/4"x1/4"
Keyway
71-1550B32QGH Sprocket Kit - 32 Tooth, 1.25" Bore, 1/4"x1/4"
Keyway
71-1550B42LGH Sprocket Kit - 42 Tooth, 1" Bore, 1/4"x1/4"
Keyway
71-1550B42QGH Sprocket Kit - 42 Tooth, 1.25" Bore, 1/4"x1/4"
Keyway
71-1550B50LGH Sprocket Kit - 50 Tooth, 1" Bore, 1/4"x1/4"
Keyway
71-1550B50QGH Sprocket Kit - 50 Tooth, 1.25" Bore, 1/4"x1/4"
Keyway
71-1550B60LGH Sprocket Kit - 60 Tooth, 1" Bore, 1/4"x1/4"
Keyway
71-1550B60QGH Sprocket Kit - 60 Tooth, 1.25" Bore, 1/4"x1/4"
Keyway
71-1550B72LGH Sprocket Kit - 72 Tooth, 1" Bore, 1/4"x1/4"
Keyway
71-1550B72QGH Sprocket Kit - 72 Tooth, 1.25" Bore, 1/4"x1/4"
Keyway
71-1550B82LGH Sprocket Kit - 82 Tooth, 1" Bore, 1/4"x1/4"
Keyway
71-1550B82QGH Sprocket Kit - 82 Tooth, 1.25" Bore, 1/4"x1/4"
Keyway
WARNING
To prevent possible SERIOUS
INJURY, DEATH, or uncontrolled
descent of the door:
• When installing a jackshaft-
style operator on a sectional
door, additional precautions
MUST be taken to assure that
proper door cable tension is
present throughout the ENTIRE
travel of the door.
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