By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Allendale Jan 24th

Compressor Problem!

Judder On Swithc-off

All Topics | Latest Posts

Search for:  in Thread Title in  
Dave Burkin15/10/2021 12:00:41
1 forum posts

Hi guys, hope all's well.

I have a Bambi 75/150 'silent' air compressor I used to use for airbrush work. It has stood idle for a couple of years due to the acquisition of a 50L Clarke machine. I've just powered up the Bambi again in preparation for selling it on and it has developed a severe judder/knock on power-down. It pumps well, oil level is fine, pump mounting rubbers are good and no other obvious nasties.

Has anyone else experienced such a problem? I failed to find anything on www

Many thanks,


Ed Duffner17/10/2021 00:45:44
831 forum posts
94 photos

Hello Dave,

- Check for any water in the tank and drain it if necessary.

- Check the motor and crank bearings for any binding. Probably not a five minute job.


Martin Kyte17/10/2021 11:38:52
2597 forum posts
45 photos

They are very soft mounted and do wobble at slow speeds. When moving mine it generally rattles a bit. You could have a hunt around for anything flapping about but if it all works I would leave it to it's own devices.

regards Martin

Dave Halford17/10/2021 14:26:48
1816 forum posts
19 photos

As this unit has a tank.

Is the tank fill valve good?

Last time you used it did it vent pressure (unloader valve) on motor switch off?

It might be if the pump output tube is still under tank pressure the pump is shuddering because it's being braked hard by back pressure from the tank when the motor is turned off.

Just guessing mind you all my comps have been piston or constant bleed without a tank.

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Latest Forum Posts
Support Our Partners
JD Metals
rapid Direct
walker midge
Eccentric July 5 2018
Eccentric Engineering
Subscription Offer

Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest