Kenwood Chef A701A - Planet Hub Rotates with Back Cover Off - UK Vintage Radio Repair and Restoration Discussion Forum

gilubilu · 16th Jul 2019, 1:14 pm

Hi,

I am in the process of restoring an old Kenwood Chef A701A. When re-servicing the gearbox, I have noted that that the clutch which should disengage the rest of the gears when the back cover is removed is not working. It seems that small gear is not being pulled up enough to remove contact from the rest of the gears. I have tried to pull this up manually and turn the wheel, but nothing.

Any suggestions?

Thanks.

trsomian · 17th Jul 2019, 8:11 am

From what I remember of these there are two axial projections on some part or other, that engage with the first gear, and when the cover is removed the thing, whatever it is, moves upwards so that the gear is no longer driven. Is that so on yours, because if it is it would seem that the part is not moving up enough: I seem to recall it is some sort cast zinc thing, with the cover pushing down on the top of it. I think it has a spring underneath it; could the spring be broken?

gilubilu · 17th Jul 2019, 8:31 am

Thank you. You are correct there is a spring-loaded shaft which moves up or down depending on whether the back cover is there or not. Thing is that even if I pull it up completely (by hand) it seems to still be engaging the rest of the gears. My worry is that it remains only just engaged (on the edge of the teeth) and could possibly damage the gears. I would almost prefer for it to be always fully engaged (I think).

mark_in_manc · 17th Jul 2019, 8:48 am

Yes, there's a pin on the front lower face of the blue plastic cover which you take off to put the liquidiser on, which bears down on a sprung-loaded shaft. This shaft should pop up when the cover comes off, leaving the end of the shaft more or less flush with the top of the hole in which it sits, or perhaps a mm or so recessed. If it doesn't pop up like that, it sounds like a broken spring underneath the thing.

Refugee · 17th Jul 2019, 1:26 pm

I would guess that the two halves of the clutch are stuck together with hardened grease.
Drip a small amount of thin oil down the plunger hole and leave it over night with the cover off and see if the plunger comes up by itself.

16th Jul 2019, 1:14 pm	#1
gilubilu Retired Dormant Member Join Date: Jul 2019 Location: Balzan, Malta Posts: 2	Kenwood Chef A701A - Planet Hub Rotates with Back Cover Off Hi, I am in the process of restoring an old Kenwood Chef A701A. When re-servicing the gearbox, I have noted that that the clutch which should disengage the rest of the gears when the back cover is removed is not working. It seems that small gear is not being pulled up enough to remove contact from the rest of the gears. I have tried to pull this up manually and turn the wheel, but nothing. Any suggestions? Thanks.

17th Jul 2019, 8:11 am	#2
trsomian Hexode Join Date: Oct 2010 Location: Box End, Beds. UK. Posts: 271	Re: Kenwood Chef A701A - Planet Hub Rotates with Back Cover Off From what I remember of these there are two axial projections on some part or other, that engage with the first gear, and when the cover is removed the thing, whatever it is, moves upwards so that the gear is no longer driven. Is that so on yours, because if it is it would seem that the part is not moving up enough: I seem to recall it is some sort cast zinc thing, with the cover pushing down on the top of it. I think it has a spring underneath it; could the spring be broken?

17th Jul 2019, 8:31 am	#3
gilubilu Retired Dormant Member Join Date: Jul 2019 Location: Balzan, Malta Posts: 2	Re: Kenwood Chef A701A - Planet Hub Rotates with Back Cover Off Thank you. You are correct there is a spring-loaded shaft which moves up or down depending on whether the back cover is there or not. Thing is that even if I pull it up completely (by hand) it seems to still be engaging the rest of the gears. My worry is that it remains only just engaged (on the edge of the teeth) and could possibly damage the gears. I would almost prefer for it to be always fully engaged (I think).

17th Jul 2019, 8:48 am	#4
mark_in_manc Octode Join Date: Nov 2011 Location: Manchester, UK. Posts: 1,874	Re: Kenwood Chef A701A - Planet Hub Rotates with Back Cover Off Yes, there's a pin on the front lower face of the blue plastic cover which you take off to put the liquidiser on, which bears down on a sprung-loaded shaft. This shaft should pop up when the cover comes off, leaving the end of the shaft more or less flush with the top of the hole in which it sits, or perhaps a mm or so recessed. If it doesn't pop up like that, it sounds like a broken spring underneath the thing.

17th Jul 2019, 1:26 pm	#5
Refugee Dekatron Join Date: Apr 2012 Location: Worksop, Nottinghamshire, UK. Posts: 5,553	Re: Kenwood Chef A701A - Planet Hub Rotates with Back Cover Off I would guess that the two halves of the clutch are stuck together with hardened grease. Drip a small amount of thin oil down the plunger hole and leave it over night with the cover off and see if the plunger comes up by itself.