A A A
Avatar

Please consider registering
Guest

Search

— Forum Scope —






— Match —





— Forum Options —





Minimum search word length is 3 characters - maximum search word length is 84 characters

Register Lost password?
sp_Feed sp_PrintTopic sp_TopicIcon
D14 fork leak
Avatar
BantamBaz
Reading Berkshire
Top Gear User
Club Member
Forum Posts: 112
Member Since:
September 15, 2018
sp_UserOfflineSmall Offline
1
June 5, 2020 - 7:17 pm
sp_Permalink sp_Print

Good evening all !

Sorry but it's me again.

My Bantam kindly dumped half of it's fork oil on the shed floor last night after I topped them up.

Pulled apart today & the seals are shot. That's a fairly easy job but on stripping down & checking I see just above the lower bush on one is a bleed hole.

The other shaft doesn't seem to have one. This shaft is a bit rusted & the hole may be just blocked.

Do you think I may have an earlier shaft & can just get my drill out ?

As always the knowledge of the wise is appreciated.

Barrie.

Avatar
mikef
Chatham Kent
Club Technical Advisor
Committee
Forum Posts: 968
Member Since:
September 30, 2011
sp_UserOfflineSmall Offline
2
June 5, 2020 - 7:44 pm
sp_Permalink sp_Print

Hi Barrie.
     I don't remember a bleed hole in either shaft (stanchion tube) of the D14 forks. I am not sure why it would be there. The only holes I know of are in the lower bushes and pass through the stanchion tubes.
Any rust in the fork assembly will put particles in the fork oil and will quickly destroy the seals, I've had that happen because of rusty springs.
You say that you topped up the forks. Each leg only holds 1/8th of a pint, could you have over filled them?

Mike.

Avatar
BantamBaz
Reading Berkshire
Top Gear User
Club Member
Forum Posts: 112
Member Since:
September 15, 2018
sp_UserOfflineSmall Offline
3
June 5, 2020 - 8:39 pm
sp_Permalink sp_Print

Hi Mike,

Yes, seems a bit odd, the hole is about 1/4 inch up the shaft from the lower bush about 1/16th dia.

I had thought I would change the fork oil as I didn't know any history of it so took the drains out & nothing came out.

Thought it a bit ominous but put 1/8 pt in & it certainly gave the forks some feel but went out today to find 2 puddles.

Another Bantam learning curve !!

Barrie.

Avatar
SpacedMarine
Up north
Top Gear User
Club Member
Forum Posts: 720
Member Since:
July 1, 2018
sp_UserOfflineSmall Offline
4
June 5, 2020 - 11:07 pm
sp_Permalink sp_Print

You mean the holes where the front mudguard stays attach?They are meant to be bleed holes there should be a fibre washer on the fork leg side of the nut in the centre of the thread.

Mine dont "bleed" very well either not sure if its muck or just a bit of weld in the way of the hole or something.If I had the right size tap I'd run it through the thread on the forks alas!

What's 7/16 in mm again?

Avatar
BantamBaz
Reading Berkshire
Top Gear User
Club Member
Forum Posts: 112
Member Since:
September 15, 2018
sp_UserOfflineSmall Offline
5
June 6, 2020 - 12:48 am
sp_Permalink sp_Print

Thanks SM.

No, not those. Those I would say are drains.

Mike is in the right place with the stanchions. An internal drilling. 

I'll clean it up a bit more & look again . bsa

Barrie

Avatar
SpacedMarine
Up north
Top Gear User
Club Member
Forum Posts: 720
Member Since:
July 1, 2018
sp_UserOfflineSmall Offline
6
June 6, 2020 - 8:13 am
sp_Permalink sp_Print

Ah you mean the fork stanchion?Yeah mine have a hole on one side above the bottom Bush I'm guessing it's to aid damping.

Must have been half asleep when I read your post it's when I read bleed hole I immediately thought of the nuts on the outside.I guess the proper term for those would be a drain!

What's 7/16 in mm again?

Avatar
BantamBaz
Reading Berkshire
Top Gear User
Club Member
Forum Posts: 112
Member Since:
September 15, 2018
sp_UserOfflineSmall Offline
7
June 6, 2020 - 8:36 am
sp_Permalink sp_Print

Ah, good morning,

Yes that's the one, you say you have it on just one stanchion only ? I did wonder if it was any thing to do with torque reaction as I think it's on the brake plate side.

Wasn't planning to take them apart just yet but will take advantage & get the rattle cans out whilst I wait for new seals.

Cheers 

B

Avatar
mikef
Chatham Kent
Club Technical Advisor
Committee
Forum Posts: 968
Member Since:
September 30, 2011
sp_UserOfflineSmall Offline
8
June 6, 2020 - 8:41 am
sp_Permalink sp_Print

Hi Barrie.
    I have just been looking at some pictures of D14 stanchion tubes and guess what? They do have a small hole just above the lower bush.
So not sure why one of yours has the hole and the other doesn't but looks like they should both have a hole.
Mike.

Avatar
BantamBaz
Reading Berkshire
Top Gear User
Club Member
Forum Posts: 112
Member Since:
September 15, 2018
sp_UserOfflineSmall Offline
9
June 6, 2020 - 8:55 am
sp_Permalink sp_Print

Thanks Mike.

As the parts list only shows one stanchion I guess they should both be the same. 

I'll have a look further under the rust.

1 stanchion differs slightly from the other in that the top section is turned down a bit.

I wondered if one had been replaced at some time by one from a different model. ie. D7 / D10.

Barrie

Avatar
stubaker58
Sunny Felixstowe
Area Rep
Club Member
Forum Posts: 581
Member Since:
June 13, 2015
sp_UserOfflineSmall Offline
10
June 6, 2020 - 9:51 am
sp_Permalink sp_Print

Hi 

I think all the lightweight stanchions are the same, the oil seal holders improved on the D14 but these can be retrofitted to the D7/10 sliders.  Tiger Cub stanchions are superficially the same but would need turning down as I don’t think they have the taper at the top.

The drain holes are a mystery to me too. On my Bushman refurb. the drain in one slider was blocked with muck.  I spent some time soaking it, cleaning it out, washing it through, generally getting it just so only to find that as soon as I screwed in the damper rod it completely blocked it again!

Regards.

D7/14 hybrid (4 speed with D7 crank etc.) on the road, D10 Bushman awaiting rebuilding.

Avatar
BantamBaz
Reading Berkshire
Top Gear User
Club Member
Forum Posts: 112
Member Since:
September 15, 2018
sp_UserOfflineSmall Offline
11
June 6, 2020 - 6:20 pm
sp_Permalink sp_Print

Hi, 

Well I've pulled it all apart this afternoon.

It looks as though one leg has been changed for an earlier one.

Internally the leg without the drilling looks rustier than the other.

I've solved the missing hole problem with my trusty Black & Decker.

Just need the new seals & a coat paint now.

Thanks everyone for your help & interest.

Barrie.

Avatar
BantamBaz
Reading Berkshire
Top Gear User
Club Member
Forum Posts: 112
Member Since:
September 15, 2018
sp_UserOfflineSmall Offline
12
June 7, 2020 - 7:55 pm
sp_Permalink sp_Print

Just as an after thought & to see if I could resize a photo, here the holes in question.

Barrie

Avatar
BantamBaz
Reading Berkshire
Top Gear User
Club Member
Forum Posts: 112
Member Since:
September 15, 2018
sp_UserOfflineSmall Offline
13
June 7, 2020 - 7:57 pm
sp_Permalink sp_Print

Ah, that didn't work, back to the drawing board!

Avatar
BantamBaz
Reading Berkshire
Top Gear User
Club Member
Forum Posts: 112
Member Since:
September 15, 2018
sp_UserOfflineSmall Offline
14
June 7, 2020 - 8:05 pm
sp_Permalink sp_Print

rsz_rsz_img_20200606_171211_burst006.jpgSome sort of success maybe

Forum Timezone: Europe/London

Most Users Ever Online: 223

Currently Online:
8 Guest(s)

Currently Browsing this Page:
1 Guest(s)

Top Posters:

cocorico: 3309

Cornish Rooster: 3109

bart: 2685

Blue Heeler: 2543

David Dale: 2346

Sprung Chicken: 2293

Piquet: 1976

Mags 1: 1853

sunny: 1699

jess steele: 1672

Newest Members:

Jamesbug

Forum Stats:

Groups: 9

Forums: 48

Topics: 11068

Posts: 98063

 

Member Stats:

Guest Posters: 1434

Members: 3106

Moderators: 0

Admins: 3

Administrators: Bantam-Super, JMD, Stoo63