Roadholder Mk3 reseal rebuild in place

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p400

p400

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In progress , Mk3 fork reseal in place.
Have RGM springs #067723P
Leakproof 06-5483/A seals appear too thin compared to OEM.
bottom circlip requires training to remove.
Have PJ1 fluid for fill 20w

Fork tube not disturbed, still clamped in place.

any advice?

20210826_RoadholderResealInPlace1.jpg
 
Instructions are not for Roadholder even tho Roadholder is printed on back.

The difference in height is 3mm.
OEM = 11mm
Leakproof= 8mm

20210826_OEMLeakproofCompare1.jpg
 
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How about notching the top of the bronze type fork bush?
Maybe I have misunderstood the notching, are other aware of this modification?

20210826_NotchBushRecc2.jpg
 
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How about notching the top of the bronze type fork bush?
why? This should all be hydraulic? no air...fluids.
 
p400 said:
Instructions are not for Roadholder even tho Roadholder is printed on back.
Click to expand...

The same applies. The Leakproof seal is intended to float below the retainer (whatever that may be) and in this case, the retainer is the collar.

CanukNortonNut said:
Can you turn your collar down enough to meet your new seal?
Click to expand...

The collar (or whatever retainer is used) should not be "turned down to meet the seal".

The Leakproof seal must have space to float below the retainer.
 
L.A.B. said:
The same applies. The Leakproof seal is intended to float below the retainer (whatever that may be) and in this case, the retainer is the collar.



The collar (or whatever retainer is used) should not be "turned down to meet the seal".

The Leakproof seal must have space to float below the retainer.
Click to expand...
Ok??? Now where does it seal???? the shaft of the the main tube or the slider ? or where ever??? I'm confused now! The leakproof is now batting up and down between the slider and the collar when it goes over rough roads?
 
Triumph twins had Leakproof or 'self-aligning' seals from '78, initially with a pressed-in retainer washer set above the seal to provide the necessary clearance...
www.thunderbirdspares.com

Fork Seals & Retainers,Set, Triumph T140/TR7, 1978-1980, 97-7010, "Leakproof"

This is a pair of good quality fork seals & retainers to fit all Triumph T140/TR7 models that use the forks with the alloy sliders from 1978-1980
www.thunderbirdspares.com www.thunderbirdspares.com
Roadholder Mk3 reseal rebuild in place


...and from '80 (according to the '80 parts book) a groove machined in each slider for a circlip and floating retainer washer above the seal.
www.thunderbirdspares.com

Fork Seals, Retainers & Circlips,Set, Triumph T140/TR7, 1981-1983, 97-7079

This is a pair of good quality fork seals, retainers & circlips to fit the Triumph T140/TR7 models that used the last type of fork seal retention
www.thunderbirdspares.com www.thunderbirdspares.com
 
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Thanks LAB. I just went back to my pile of excess Norton parts and looked at the slider internals and how much sealing area there is for the seal to float. More than enough. I know I am getting old. old school ... momentary laps of reason....new school....brain fart.
Cheers,
Tom
 
The difference in seal height is 3mm.
OEM = 11mm
Leakproof= 8mm

Because of this height difference, the retainer collar #7 will be allowed to screw in further to allow itself to bottom on the alloy lower leg rather than the seal stack.
I would guess about 1-1½mm.

Mk3RoadholderIPB.jpg
 
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p400 said:
The difference in seal height is 3mm.
Click to expand...

"Seals naturally float to the top of the cavity, 2-4mm space...is not a problem."

p400 said:
Because of this height difference, the retainer will be allowed to screw in further to allow itself to bottom on the alloy lower leg rather than the seal stack.
I would guess about 1-1½mm.
Click to expand...

The seal needs a minimum of 0.5mm (0.020") float clearance.
 
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Wrapped up for the day. Still need oil and assembly.
Thank you for the help, it is nice to have such an active forum, it is crucial to have LAB., Thank you.


20210826_RoadholderResealInPlace2.jpg
 
p400 said:
How about notching the top of the bronze type fork bush?
Maybe I have misunderstood the notching, are other aware of this modification?

View attachment 81609
Click to expand...

Did you notch the bushes?
www.accessnorton.com

Leakproof seals or not?

I understand from Rabers in San Jose that people are not using Leakproof seals like they once did. Seems that there have been issues with them and some are swearing off them. I don't know exactly what the issues are. The way the person at Rabers put it is that where a few years back most used...
www.accessnorton.com www.accessnorton.com
 
L.A.B. said:
Did you notch the bushes?
www.accessnorton.com

Leakproof seals or not?

I understand from Rabers in San Jose that people are not using Leakproof seals like they once did. Seems that there have been issues with them and some are swearing off them. I don't know exactly what the issues are. The way the person at Rabers put it is that where a few years back most used...
www.accessnorton.com www.accessnorton.com
Click to expand...
Did not notch. Could not find any info on this mod.
 
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