Author Topic: Vax Mach Air U91 Stripdown and Refurb (Read 31102 times)

CroftyJohn · « **Reply #30 on:** January 05, 2020, 01:03:26 pm »

Congratulations Mr BEKO1987 a brilliant set of photos. I have dismantled and maintained, repaired a VAX AIR MACH model U91-MA-B including replacing the power cable from the main motor to the brush roller PCB, quite a fiddle to feed it thru the axle yoke and bearing cap where it gets damaged in service.

I now am trying to find a supplier for the axle lock spring from the opposite side. This is to hold the handle and works in an upright position when not in use.

Can anyone advise where I might find such a spring in stock?

Thanks for all advice.

CroftyJohn · « **Reply #31 on:** January 05, 2020, 01:07:13 pm »

By the way "just pop out" the wheel retainer is absolutly a huge understatement. Just not possible. I even struggled to knock it out after prising the yoke assembly from the floor part. I think a modification to the retainer to reduce its stiffness is necessary.

Marko · « **Reply #32 on:** April 22, 2020, 11:25:34 am »

Great post and v. helpful. I have recently inherited a Vax Mach Air. Cleaned uit up and replaced all filters hoses and belt etc. Although brushes turn there is no suction.
Can someone tell me the cause and give me a solution please?

beko1987 · « **Reply #33 on:** April 22, 2020, 11:31:50 am »

Quote from: Marko on April 22, 2020, 11:25:34 am

Great post and v. helpful. I have recently inherited a Vax Mach Air. Cleaned uit up and replaced all filters hoses and belt etc. Although brushes turn there is no suction.
Can someone tell me the cause and give me a solution please?

Odd, should be loads of suction if you've done the filters!

Is there suction with the cyclone off? Take the cyclone off, and put your hand over where the suction comes from the chassis. If there's loads, put the cyclone back on. Does the machine suddenly start screaming? If so there is a blockage somewhere, or something isn't together correctly in the cyclone.

Also how did you clean the filter? Did you vacuum it off or rinse it in the sink? I had a vax once with the same symptoms but I'd vacuumed off the filter. one 3 hour 60 degree wash with the towels I had to do anyway fixed everything. Sounds odd, but take the filter out and put the bin back together then use masking tape/sellotape to seal the join (the filter provides the seal). Suction restored?

Otherwise I'm a bit sumped as you'd see a clog in the hose or brushroll housing...