Liftmaster garage opener

[Bazsm]

I inherited one of the LIftmaster chain type garage openers when we moved into our house 20 odd years ago and have tolerated it just because whenever I think about laying out £2k for a decent replacement the money ends up going elsewhere!

Anyway, after the opening and closing mechanism had been playing up for a bit the sprocket sheared off the top of the control unit so I have to do something now!

Short term I'll try and fix the unit but I've also noticed the anchor point above the garage door into the mortar has become loose so can anyone suggest a DIY product I can use to stabilise the loose mortar before I try and reattach the anchor point bolts?





TIA

[andy43]

2 part resin would do it - hack out the loose stuff then inject it and smooth it out so it looks like it’s been pointed?

[Bazsm]

andy43 said:

2 part resin would do it - hack out the loose stuff then inject it and smooth it out so it looks like it’s been pointed?

Thanks, I've never used a product quite like that, would I be able to drill into it after it's set?

[andy43]

Bazsm said:

andy43 said:

2 part resin would do it - hack out the loose stuff then inject it and smooth it out so it looks like it’s been pointed?

Thanks, I've never used a product quite like that, would I be able to drill into it after it's set?

I’ve fired self tappers into resin with a pilot hole drilled first so yeah I reckon that’d work.

[VTC]

Or a simple spreader plate to give a better fixing over a larger space

[Fatboy]

It looks like it's currently fixed with expanding anchors that are damaging the brick and mortar - if you remove the existing bolts and then use a 2 part resin to fix some new threaded rod into the holes it'll give a rock sold fixing for them

Resin like this:
https://www.screwfix.com/p/rawlplug-r-kem-ii-styre...

And sruds like these (assuming the existing are M8)
https://www.screwfix.com/p/easyfix-studs-silver-m8...

Just remove the bracket from the runner, clean the holes out with a brush/vacuum, set the studs the the same length sticking out of the bits as you have at present so that it still clears the cog and chain, fill the hole half to three quarters full of resin and stick the studs through the bracket and then into the holes in the wall - hold it for 5-10 minutes while the resin hardens and you'll have a sold fixing that'll last. Give it another couple of hours, tighten the nuts and then refit the rail with the cog and chain in it

Edited by Fatboy on Saturday 8th March 17:34

[Bazsm]

Fatboy said:

It looks like it's currently fixed with expanding anchors that are damaging the brick and mortar - if you remove the existing bolts and then use a 2 part resin to fix some new threaded rod into the holes it'll give a rock sold fixing for them
Resin like this:
https://www.screwfix.com/p/rawlplug-r-kem-ii-styre...
And sruds like these (assuming the existing are M8)
https://www.screwfix.com/p/easyfix-studs-silver-m8...
Just remove the bracket from the runner, clean the holes out with a brush/vacuum, set the studs the the same length sticking out of the bits as you have at present so that it still clears the cog and chain, fill the hole half to three quarters full of resin and stick the studs through the bracket and then into the holes in the wall - hold it for 5-10 minutes while the resin hardens and you'll have a sold fixing that'll last. Give it another couple of hours, tighten the nuts and then refit the rail with the cog and chain in it

Appreciate the detailed reply, by the time I'd seen it I'd already gone out and got some Milliput 'terracota' 2 part putty which it states is suitable for brickwork: https://www.milliput.com/terracotta.html - it was very easy to work with and I basically forced it into every gap and between the anchor bolts. 12hrs later and it had set hard and seems to be up to the job...I'll know for sure after I've replaced a few gears in the door opener and test it in anger!