I am getting ready to do a little service to our craftsman chain drive GDO,
lube/adj tension on the chain,etc.
IIRC they give you a spec. of like ~1 inch sag below the C/L of the
trolley or track.
My question is; is this with the door open, or the door closed, because it
is different in either case.
Also, is it a good Idea to put a little White grease or some type of dry
lube on the track and the trolley?(Not the roller tracks)
TIA Tony D.
It's with the door disconnected from the opener & the opener carriage
stopped at about half way opened so there is no force being exerted on
Yes the opener rail should be greased w/ a white or light weight
grease periodically to reduce friction but should be put on very
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