Fitting Replacement Thetford Hatches (1 Viewer)

Mar 12, 2012
1,395
1,612
Bridgend, South Wales
Funster No
20,125
MH
Coachbuilt
Exp
Just started!
The rear Thetford hatches on my Burstner are damaged & leaking so I need to change them asap. I've purchased new replacements and Sikaflex 521 sealant.

Would be interested if anyone has any tips before I start? Like what size stainless screws should I buy?

Cheers

John
 
Oct 1, 2007
7,063
13,963
Kirby cross further from londin
Funster No
504
MH
Between Motor homes
Exp
since 08
The rear Thetford hatches on my Burstner are damaged & leaking so I need to change them asap. I've purchased new replacements and Sikaflex 521 sealant.

Would be interested if anyone has any tips before I start? Like what size stainless screws should I buy?

Cheers

John

When I changed my Thetford cassette door
(caught and damaged reversing down the drive
Ooh all right ripped off )
I used the existing screws stainless steel

But I used non setting sealant 2-4 pound from caravan shops
Or possibly halfords

Just think there may be a need to remove it again ,!!!!

But sikaflex is the holy grail of sticky stuff but a complete swine to undo :thumb:
 

rainbow chasers

Free Member
Oct 30, 2009
3,680
1,725
Mid Cornwall
Funster No
9,132
MH
Various
Exp
9
1. Unscrew all screws

2. Using either a plastic trim bar, or a wide head screwdriver covered with tape/cloth gently insert at regular intervals to break the seal.

3. Once you have gone round and loosened the seal, gently prise apart - try to use as little pressure as possible to avoid denting/scrtaching bodywork, it will come!

4. Once started off, you can pull apart with your hands, and gently trim the sealer with a blade as you go.

5. Once off clean all sealer from both door frame and body work with some solvent.

6. Apply a bead to the frame, enough the amply fill the trough. You can't go too overboard - it will just mean more of a clean up later!

7. Attach to body, and screw in screws equally and opposite (like a wheel!)
DO NOT TIGHTEN

8. Pinch the frame to the body, and clear off excess with solvent and a cloth.

9. Leave overnight for a skin to form on the sealant, and then tighten up. This ensures a good seal, and makes sure you don't overtighten and push all the sealant out!

Check around the join to ensure a clean edge of sealant is visable, and there are no gaps and you are done!:thumb:

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