LiftMaster LIF-CHNGUARD Manuel D'instructions

To prevent possible SERIOUS INJURY or DEATH:
• ALL maintenance or servicing MUST be performed by a trained door
systems technician.
• Disconnect electrical power to the operator (including battery backup
if provided) BEFORE performing ANY adjustments or maintenance.
• Do NOT reconnect electrical power until instructed to do so.
WARNING: This product can expose you to chemicals including
lead, which are known to the State of California to cause cancer or
birth defects or other reproductive harm. For more information go
to www.P65Warnings.ca.gov.
APPLICATION
CHAINGUARD3IN is a chain guard kit for use with MAXUM extended shaft
length models (RJDC, JDC7 "E", JHDC7/12 "E" and JHDC22).
CHNGUARD is a chain guard kit for use with MAXUM standard shaft length
models (JDC7 and JHDC7/12).
FUNCTIONS
The chain guard covers the operator sprocket and is required if the installed
operator sprocket height is below the minimum 8 foot height requirement.
INSTALLATION
1. Disconnect power from the operator.
2. Secure the garage door according to the door manufacturer's
instructions.
3. Position the Chain Guard over the operator sprocket and chain. Align the
chain evenly with the openings in the Chain Guard. (See Fig 1.)
4. Mark the locations of the Chain Guard mounting slots on the operator
chassis.
5. Use the self-drilling screws to secure the Chain Guard to the operator
chassis through the mounting slots. (See Fig 2.)
6. Reconnect power to the operator.
114-5974-000 (Rev. B)
1
WARNING
INSTRUCTIONS DU KIT PROTÈGE-CHAÎNE
KIT DE INSTRUCCIONES DEL PROTECTOR DE CADENA
Fig 1
Fig 2
LiftMaster and the LiftMaster logo are trademarks, service marks, and/or
registered trademarks of The Chamberlain Group LLC. All rights reserved.
The Chamberlain Group LLC, 300 Windsor Drive, Oak Brook, IL, 60523, United States
CHAIN GUARD KIT INSTRUCTIONS
P/N: CHAINGUARD3IN & CHNGUARD
©2025 The Chamberlain Group LLC