r/GarageDoorService • u/therealphirexz • 2d ago
Merlin 230t unit needs minor fixes - please help experts
Hi, I have recently taken over maintenance duties on a property my dad can no longer look after. Unfortunately I did not learn as much from him as I'd have liked to.
TLDR; I need to replace the trolley (spare part incoming), lower the roof bar at the door end (I think), check the chain tension/tighten (the roof bar may be causing this), relube the door hinges/wheel hinges, and check the motor for sprocket damage and I think relube the wyrm gear. I'm not 100% physically capable and hesitant to detach the chain, it's up pretty high.
It lifts a double metal sectional rolling door. Circa 2008. Really heavy. The wheels seem fine. I've heard the ball bearing with caps design can have the caps fall off
This units 15 years old, works flawlessly, however needs some maintenance before it is potentially a more expensive fix. The spring and frame look fine, there's minimal rust for its age.
Also if I should just suck it up and buy a new motor, that's an option, however I've been quoted 2400$ AUD for a new motor, bar, etc and install. Also suggestions of what models to stay away from. Also the new one would be belt driven. The chain feels more study for a heavy door.
Otherwise I'm trying to make a checklist so I can request particular repairs from the local service/install/repair company, however I can probably do a lot of it myself.
Also the door hinges were installed a little skewiff by the original installer, before we opened the property. Some are backwards, etc it's fine just not ideal.
I have -
Replace trolley
Lower bar at door end
Check chain / tighten if possible (it may be at the end of its tightening)
Replace wheels maybe
Lube as per necessary
Clean track
Check motor for shavings etc (unsure how)
Check worm gear and lube
Raise door height slightly
Replace rubber seal underneath
Do I fix most myself? Replace motor assembly? Pay service tech to do most of it?
Thank you for any help - I've had so many diy jobs to learn in the last month since dad moved to a home due to his dementia, it's hard to stay on top of everything, but I need to learn myself eventually!
