Dometic Midi Heki (with crank handle): Gearing Mechanism Replacement Query

[Pebble99]

Hi, my Globecar rooflight above the dinette (Dometic midi heki 70x50) is not closing properly so I recently purchased a new gearing mechanism which arrived the other day. Having now seen the replacement parts I am worried that I may not be able to fix this myself. The gearing mechanism looks like it can be removed from the inside of the van once you remove the crank handle and cover. The top of the gearing box (which isn't visible from inside the van) has two parallel channels in it which I assume is for the metal cables which pull the rooflight up and down, and in the middle of the two cable channels is where the metal replacement cog sits. I have attached 2 pics which show both the top and bottom views of the replacement gearing box.

I am wondering whether anyone has successfully replaced this Dometic heki gearing mechanism and if so, how difficult was it, and do you remove the gearing box from inside the van. I am worried that when I remove the 4 or 5 screws and lower the old gearing mechanism, the cables will dislodge and be really hard to get back into place in the new replacement gearing box (since I can't get at it from the top).

 

[Minxy]

I haven't done it but had to have it replaced on a previous Globecar PVC and it was all done from the inside so it must be possible.

 

[Dandm]

Hi, my Globecar rooflight above the dinette (Dometic midi heki 70x50) is not closing properly so I recently purchased a new gearing mechanism which arrived the other day. Having now seen the replacement parts I am worried that I may not be able to fix this myself. The gearing mechanism looks like it can be removed from the inside of the van once you remove the crank handle and cover. The top of the gearing box (which isn't visible from inside the van) has two parallel channels in it which I assume is for the metal cables which pull the rooflight up and down, and in the middle of the two cable channels is where the metal replacement cog sits. I have attached 2 pics which show both the top and bottom views of the replacement gearing box.

I am wondering whether anyone has successfully replaced this Dometic heki gearing mechanism and if so, how difficult was it, and do you remove the gearing box from inside the van. I am worried that when I remove the 4 or 5 screws and lower the old gearing mechanism, the cables will dislodge and be really hard to get back into place in the new replacement gearing box (since I can't get at it from the top).

View attachment 451993View attachment 451994

Did you have any luck. Mine has just failed to lift the skylight so may need to dismantle or replace.

 

[Pebble99]

Hi, yes I managed to replace and much better now

 

[Dandm]

Hi, yes I managed to replace and much better now

Any tips?

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[mitzimad]

best advice we were given in our handover was never use the winder without pushing the top up with your hand to keep the weight of the gears

 

[Pebble99]

Any tips?

Its pretty straight forward to remove the heki trim by undoing all the visable screws and then removing the gearing black box. Once the gearing box is removed, the hardest thing is to fit the new cog between the 2 cables within the cable channel. It took me quite a while to do this part and then once done just put everything back in place. I found it easier with 2 people when putting back and aligning the main interior heki trim. My metal cog was not that worn so probably didnt need replacing (only the gearing box really needed replacing) so you may get away with just replacing the gearing part which is easy.

 

[t&j mitch]

Its pretty straight forward to remove the heki trim by undoing all the visable screws and then removing the gearing black box. Once the gearing box is removed, the hardest thing is to fit the new cog between the 2 cables within the cable channel. It took me quite a while to do this part and then once done just put everything back in place. I found it easier with 2 people when putting back and aligning the main interior heki trim. My metal cog was not that worn so probably didnt need replacing (only the gearing box really needed replacing) so you may get away with just replacing the gearing part which is easy.

hi just wondered if you can let us know where you got the gear from please.
ours failed on our globecar a couple of weeks ago and at moment is taped down to stop it rattling.
everywhere ive tried has said 2 month delivery .

 

[Pebble99]

Leisureshopdirect and the parts I ordered were:
248840 Dometic Midi-Heki Gearing Mechanism Complete for Crank Version
260101 GD1031 Heki Gear Wheel cog

The way I temporarily secured the skylight from flying open was using a dent puller suction cup connected with paracord tied around the passenger armrest and tightened using a tent rope tightener..

 

[t&j mitch]

Leisureshopdirect and the parts I ordered were:
248840 Dometic Midi-Heki Gearing Mechanism Complete for Crank Version
260101 GD1031 Heki Gear Wheel cog

The way I temporarily secured the skylight from flying open was using a dent puller suction cup connected with paracord tied around the passenger armrest and tightened using a tent rope tightener..

hi thanks for info. unfortunatley out of stock till end of october so might have to try your other method

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[Dandm]

Thanks

Its pretty straight forward to remove the heki trim by undoing all the visable screws and then removing the gearing black box. Once the gearing box is removed, the hardest thing is to fit the new cog between the 2 cables within the cable channel. It took me quite a while to do this part and then once done just put everything back in place. I found it easier with 2 people when putting back and aligning the main interior heki trim. My metal cog was not that worn so probably didnt need replacing (only the gearing box really needed replacing) so you may get away with just replacing the gearing part which is easy.

Thanks for the advice, much appreciated