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Author Topic: Hitachi Powerhouse CV-770D Refurb!  (Read 1206 times)

Offline beko1987

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Hitachi Powerhouse CV-770D Refurb!
« on: January 26, 2015, 10:58:23 PM »
I've had this one a while, saw it on ebay back in the summer, missed it, and grabbed it on the re-list. SWMBO picked it up, as she was going shopping that day (could have been any day really  :underchair:)



I remember seeing these everywhere when I was little! They ran for a few years, did a 900w, this one, 1100w, and 1300w I think, in different colours!





The hose came off first, as I had a load of dyson hoses and filters to wash, so bunged this in as well



Typical hitachi tools





It wasnt too bad when I got it, but it was a tad loud

<a href="https://www.youtube.com/watch?v=ZbcwlzA1k2Y" target="_blank">https://www.youtube.com/watch?v=ZbcwlzA1k2Y</a>

So, on with the usual!

Bag door off





Door catch popped off



Inner seal removed





Pre motor filter wasnt too bad, I think the elderly couple who owned it since new took ok care of it



Handle off



Top cap popped off



Onto the underneath now



Blockage channel removed



Hood unscrewed and removed



Release pedal off





Belt guard off



Very stretched belt and brushroll removed



Brushroll end caps off



and the brushroll was split down



One of the bearings was seized solid, and the other was none too healthy, which explained the awful noise it made. More on that later

2 pivot hinges removed and the base seperates from the main body



Onto the wheels now





Wheels removed, and the brace bar removed, with its orientation refrenced



Height adjuster knob split and removed



There were 2 pictures of the rest of the reclining mechanism being removed, but the flash made them useless so I'll skip that, and move onto removing the baseplate seal



I tried to remove the rear wheels, but failed, and didn't want to damage the, so left them be!



Many screws later, and the main body of the machine splits into 2



Was filthy



Lower cord hook removed



Hose clip removed



Onto the top wiring now



Mains incoming terminal



I see alot of solder sadly around the switch terminals





I had to snip a wire to remove it all



Then realised I'd snipped the wrong wire, so had to snip again  :censored:



Carrying on, the bag fill indicator piston pops off





The whole motor assembly lifts out now, and this is the suction diverter piece





The bag seal pulls out



as does the bag holding clip



These clogged bits of foam revealed themselves



On to the motor now, it didnt look too clever







Rubber mount off





I decided to see how far the motor comes apart, so fan shroud tapped off



Fan retaining nut off



Fan and inner shroud off



The carbon brushes are removed with just a few screws



Which takes the rest of the wiring with it



All the wires the machine has



4 more screws seperate the motor unit



The coil seems to be fixed, so I didnt persuade it too hard, but the fancase bearing tapped out easily



and, brilliantly, was re-greaseable!



so I did



Coil and armature looked very good



and again, had a servicable bearing



All tickled, I re-assembled the motor unit



All the screws for the whole machine



Everything was the nwashed and dried, including the motor fan and fan cover as it was full of dust, and hair as it turned out once the water flushed it through!



All back together with the clean motor seals







Clean foam bungs were re-fitted





And I then fitted a lick of tape over them for good measure



Cleaned bag seal refitted





Motor was mated back up with the suction diverter, then the whole assembly drops into the chassis



Bag piston reassembled



and refitted



All the wiring was fitted and trunked appropriatly





and crimped up where I cut it

Lower cord hook and hose hook refitted



Bottom section now



Hood seal fitted



Reclining mechanism fitted



Front wheels refitted



Pivot clamps fitted



and the hood and blockage window screwed down. Was waiting for bearings by this point, so left her like this



Bag door clip back on



and the seal pushed into its slot



The pre motor filter cleaned up nicely



and that was that! 2 weeks later, the new bearings arrived (from some country or other), so work re-commenced!





anti vibration shim fitted into the bearing holder





fitted into the brushroll



End caps and axle fitted



New belts





All finally back together







<a href="https://www.youtube.com/watch?v=mDUVaMEFIJo" target="_blank">https://www.youtube.com/watch?v=mDUVaMEFIJo</a>

And the old girl is all done! Things got a bit busy with paying Dyson work, so I've been using it upstairs whilst I wait to polish and wax and finish her, so for now, that's it!
Collector and restorer of vintage vacuums, Dyson Appreciator! Come and see my blog, where I am uploading all my mountains of brochures, manuals and other vacuum cleaner paperwork, and also my youtube channel @beko1987!

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