Slack in turntable rotation gear Genie Z45/22

[Lasse Kiel Madsen]

Hi everyone.
I'm looking to buy a 1997 Genie Z45/22 lift. Everything seems to be okay for the age of the lift, but it has a lot of slack in the rotation gear (worm gear system). I've tried to study the service manual to see if there is any way to adjust the tolerance in the worm gear system, but can't figure it out.
Any of you that have any experience into this?
If it can be adjusted, fair I'm going to buy the machine, but if it require a brand new worm gear, I will pass on it.

Appriciate a lot your comments.

 

[mekanik]

Are the worm drive bearing greasable?I used to maintain a lift "not a Genie" that had a worm rotation system. There was a grease fitting on the worm Housing that put grease on the worm gear which it spread around the rotation bearing. There was no way to lube the tapered roller bearings at either end of the worm. They were packed with grease at assembly. Over the years the grease disappeared and the bearings failed damaging the rotation bearing. Can you get someone to move the boom back and fourth while you watch and see if there is end play on the worm gear.

 

[Lasse Kiel Madsen]

Are the worm drive bearing greasable?I used to maintain a lift "not a Genie" that had a worm rotation system. There was a grease fitting on the worm Housing that put grease on the worm gear which it spread around the rotation bearing. There was no way to lube the tapered roller bearings at either end of the worm. They were packed with grease at assembly. Over the years the grease disappeared and the bearings failed damaging the rotation bearing. Can you get someone to move the boom back and fourth while you watch and see if there is end play on the worm gear.

This is a very good point, I follow you 100%. I don't think it's possible to inspect the spindle of the worm gear if I recall correct. Even from the exploded view from Genie site, it not really showing a possibility to unassemble the worm drive it self.

 

[Lasse Kiel Madsen]

@mekanik here are a picture from Genie part manual

 

[mekanik]

The picture does not show the bearings and the grease fitting shown looks like its for greasing the worm.

 

[Lasse Kiel Madsen]

Yes agree. I'm not sure the bearings are accessible.

 

[mekanik]

If there is a problem with the worm unit the upper body has to come off at the rotation bearing.

 

[Lasse Kiel Madsen]

An update just to close this, I decided not to buy the lift. Had a talked with Genie service technician who could tell me the worm gear assembly is not serviceable, and you mention Mekanik the entire upper body needs to come of, and repair will be to expensive. But thanks for your input.