• The Roadster Factory Recovery Fund - Friends, as you may have heard, The Roadster Factory, a respected British Car Parts business in PA, suffered a total loss in a fire on Christmas Day. Read about it, discuss or ask questions >> HERE. The Triumph Register of America is sponsoring a fund raiser to help TRF get back on their feet. If you can help, vist >> their GoFundMe page.
  • Hey there Guest!
    If you enjoy BCF and find our forum a useful resource, if you appreciate not having ads pop up all over the place and you want to ensure we can stay online - Please consider supporting with an "optional" low-cost annual subscription.
    **Upgrade Now**
    (PS: Subscribers don't see this UGLY banner)
Tips
Tips

TR6 Seat diaphragm failure on 2nd seat!

wlcarruth

Freshman Member
Offline
Pardon - I'm learning here - this is my first post other than an intro!

I rebuilt the driver's seat about 4 yrs ago with foam/parts from Moss. The project's been idle until the last two months but I don't remember any problems with the first seat. I installed the seat diaphragm on the 2nd seat. All clips installed successfully but I went out this morning and there was a failure on 3 of the locations that pulled the small rod through the rubber. The garage and parts were not cold (Don't judge... I live in Texas and the garage was about 68F.) I ordered a single replacement diaphragm but after searching the forums and not finding any with this specific failure, I'm wondering if this is an installation issue (it's me, not you...) or a defective diaphragm. Any thoughts?
IMG_6460.jpgIMG_6459.jpg
 

Gliderman8

Great Pumpkin
Country flag
Offline
Welcome to the British Car Forum!
It's been a long time since I replaced the diaphragms on my TR6. I can't say that you've done anything wrong looking at the pics.
I guess its possible that the quality of the rubber parts have deteriorated over the years due to inferior products being supplied to the vendors we buy from.
Have you contacted the supplier of the diaphragms?
 
OP
W

wlcarruth

Freshman Member
Offline
In fairness to Moss, I did inquire through their online system but there has not been sufficient time for a response. Since the first one did not seem to have the problem, I'm tempted to pull the other seat back out of the car and flip it over! I'll give Moss a few days to see how they respond.
 

Gliderman8

Great Pumpkin
Country flag
Offline
I’ve always found Moss to be customer service friendly. With the covid they might be operating remotely and it could take longer to reply. I’m sure they will find a solution for you.
 

ed_h

Jedi Hopeful
Country flag
Offline
I had a pair of these fail in the same way after a few months. Dont remember where i got them, but there are some bad ones out there.
 

wjcstp

Freshman Member
Country flag
Offline
Not that this is necessarily what you did, but the last diaphragm I tore was from kneeling on the seat while trying to fix something. I felt a pop and sure enough, 3 of the clips had torn completely off.

It's possible, with a little extra grunt, to install doubled diaphragms if you want a little extra security (and possibly a little higher sitting position).
 

glemon

Yoda
Country flag
Offline
I had the problem too, I don't remember where I got them, but drivers side failed a few years after redoing my TR250, I redid the seat properly with new seat foams (I had just recovered before) and has held up fine, I am not huge but not time at about 215 these days, sure that doesn't help. I think the new foams probably help spread the load better.
 

Madflyer

Jedi Knight
Country flag
Offline
It is most likely not you but it does not have to be pulled tight the foam does the work and the rubber keeps you off the carpet so use longer clips. Madflyer
 

Derekmcallister

Freshman Member
Country flag
Offline
I kneeled on my seat with a TRF diaphragm and it parted at the metal tabs as described in an earlier post; their part was very thin around the edges. The Moss replacement was much beefier and should last longer, but even with new foam a misplaced knee may wreck them.
 
Similar threads
Thread starter Title Forum Replies Date
Celtic 77 MGB Seat Diaphragm replacement MG 0
SherpaPilot TR6 Difficulty with New Seat Diaphragm Install Triumph 6
SpannerMan TR6 TR6 seat - installing new diaphragm Triumph 3
C MGB Re strapping a MGB seat bottom MG 2
T TR4/4A TR4 seat buffer problem Triumph 5
Scotsman TR4/4A Moss seat covers for TR4A missing spring tensioner pocket Triumph 0
A MGB Seat Cover Installation MG 1
tr6nitjulius For Sale 4$ale: 3 Point Seat Belts Red Triumph Classifieds 0
D TR2/3/3A layout for lap type seat belt Triumph 5
R Vixen 2500 Seat Buckets TVR 3
TunaJ Will MGB Upper Seat Runners work with Midget seat rails? Spridgets 1
Celtic 77 MGB Seat webbing replacement. MG 1
WHT BJ8 Rear Seat Surround Drain Tube Grommets Austin Healey 0
B BJ8 Seat Sliders Austin Healey 4
Got_All_4 For Sale 1969 TR6 Driver Seat Triumph Classifieds 0
D TR2/3/3A tr3a occasional seat padding Triumph 10
AUSMHLY BJ8 Rear Seat Squab Austin Healey 0
TomMull MGA Rumble seat MGA MG 3
T Three-Point Seat Belts Austin Healey 8
B Seat Inserts Austin Healey 6
Michael Oritt Best Seat Trim Adhesive Austin Healey 8
D New seat covers Spridgets 11
Celtic 77 MGB 1977 seat webbing replacement. MG 1
shadowfever Seat runner with lever Spridgets 2
F TR4/4A Seat rail extension Triumph 4
KVH General Tech Seat Upholstered Panel Triumph 2
shadowfever Midget seat nuts and bolts Spridgets 2
shadowfever Moss Motors MG Midget seat covers Spridgets 6
shadowfever 65-69 Spridget seat Diaphragms Spridgets 5
Challenger TR4/4A Seat Retainers Triumph 1
S Wanted BT7 Front Passenger Side Seat Pan Austin Healey Classifieds 0
JohnGone Wanted '80 MGB without seat belts? MG Classifieds 3
D Rear Seat Side Panels, BT7 Austin Healey 3
M For Sale vintage 3-point retractable seat belts MG Classifieds 0
Mickey Richaud Wanted Wanted: BJ8 Seat Track Sets (Both Sides) Austin Healey Classifieds 5
A For Sale '74 TR6 original seat frames Triumph Classifieds 0
J For Sale Triumph Tr2/3 seat foams Triumph Classifieds 1
C Seat Slide Bearings Austin Healey 3
F Wanted TR3A rear seat peg and clip Triumph Classifieds 2
EricJNewman MGB Modern Seat Tracks in MGB Solution MG 8
crispy BJ8 Rear Seat Back Upholstery Hardware Austin Healey 7
Jim_Gruber Bugeye Seat Pans needed Spridgets 1
J BJ8 Rear Seat Changes, 1964 to Later Austin Healey 9
mrv8q TR2/3/3A TR3A TRF vinyl seat reupholstery kit Triumph 7
J TR4/4A TR4A seat retaining clip Triumph 5
R BJ7 Back Seat-Rest Austin Healey 1
A TR2/3/3A Seat position Triumph 2
jlaird Wanted One Bugeye seat Spridgets Classified 0
WHT Late BJ8 Seat Belt Mounting Points Austin Healey 8
J TR4/4A Seat install, Spring clip Triumph 0

Similar threads

Top