HFT500 probe seal

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oyster
Posts: 40
Joined: Tue May 05, 2015 3:25 pm
Location: retirement land, Kent

HFT500 probe seal

Sat Feb 11, 2017 4:38 pm

What size is it? I might have one in my collection
Any clues how best to remove and fit?
S400 MPR
S200T
DS Regal
HW77
HW77K
HW97K
BSA Goldstar SE
HW100

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Archer50
Posts: 200
Joined: Mon Jun 20, 2016 5:06 pm
Location: Perth

Re: HFT500 probe seal

Sat Feb 11, 2017 9:26 pm

Assuming you mean the seal in the breech, it's the usual 4.5x1.5 nitrile, 70 Shore that, as far as I know, all the 400/500 series use.

Removing it is easy (in fact almost automatic :D ), just hook it out. Replacing it is more of a hassle. I use a length of 4mm wooden dowel down the muzzle, held in place with insulating tape, as a backstop to prevent the o ring going past the seating groove, and then fiddle it in with 2 small Allen keys.

If your HFT500 is anything like mine, I'd make sure you have plenty of spares - it's probably the weakest part of the whole design and you might find yourself becoming a bit of an expert ;)

Happy fiddling...

Alan

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oyster
Posts: 40
Joined: Tue May 05, 2015 3:25 pm
Location: retirement land, Kent

Re: HFT500 probe seal

Sun Feb 12, 2017 1:07 pm

Thank you Alan.
To confirm, that is 4.5mm od x 1.5mm cs ?
It is the getting the old one out that is usually the challenge!
S400 MPR
S200T
DS Regal
HW77
HW77K
HW97K
BSA Goldstar SE
HW100

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TenMetrePeter
Posts: 1043
Joined: Wed Jun 29, 2016 5:40 pm
Location: Luton Beds UK

Re: HFT500 probe seal

Sun Feb 12, 2017 1:23 pm

4.5 ID hopefully!

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oyster
Posts: 40
Joined: Tue May 05, 2015 3:25 pm
Location: retirement land, Kent

Re: HFT500 probe seal

Sun Feb 12, 2017 2:42 pm

ah yes; 4.5mm od would leave quite a small id !!
S400 MPR
S200T
DS Regal
HW77
HW77K
HW97K
BSA Goldstar SE
HW100

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Archer50
Posts: 200
Joined: Mon Jun 20, 2016 5:06 pm
Location: Perth

Re: HFT500 probe seal

Mon Feb 13, 2017 10:48 am

Yep, ID.

I've never had any problems getting them out - they're not held in place by anything except their own rigidity (if that's the right word). I use an old dental pick, but any sort of a hook will do the job fine, just be careful not to scratch the metal.

Alan

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Blackbaronfish
Posts: 3690
Joined: Sun Feb 15, 2015 6:20 pm
Location: Nuneaton

Re: HFT500 probe seal

Mon Feb 13, 2017 11:30 am

Use a cocktail stick with a bit of grease to ease it out.

BBF
Did I mention that I'm the only one to have attended EVERY meet since we started

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