Defective flywheel ring gear... :: Triumph Torque

Triumph Parts Sign up for our Newsletter Rimmer Bros

Welcome, Guest.
Please login or register.
Defective flywheel ring gear...
Forum Login
Login Name: Create a new account
Password:     Forgot password

Triumph Torque    Cars    Herald/Vitesse  ›  Defective flywheel ring gear...
Users Browsing Forum
Alex, Lundyosprey and 18 Guests

Defective flywheel ring gear... Print
1 Pages 1 Recommend Thread
Scimher
December 5, 2017, 8:58am Report to Moderator

Posts: 532
Posts Per Day: 0.23
My late '64 Herald 1200 convertible has a Dolomite 1300 engine. For some time now the starter has 'meshed' occasionally - once the ominous 'click' has happened I have just put the gearlever into 4th & either pushed the car a foot or so forward or backwards so that the starter would engage......invariably she would start instantly.

Needless to say the situation has got worse with the occasional severe locking up which no amount of rocking the car will free. A spanner on the starter 'pinion' has saved the day on a couple of occasions...

My question is, is it better to look for a replacement flywheel - or would it be better to get some new ring gear for the existing flywheel? I am presuming the gearbox is original Herald so what flywheel should be sought if it needs to be replaced?

Any comments or advice, gratefully received...  
Logged
Private Message
JohnD
December 5, 2017, 9:10am Report to Moderator


Posts: 6,794
Posts Per Day: 1.51
Scimher,
What makes you think that the ring gear is at fault?

Far more likely is the starter motor pinion throw-in mechanism.  I think the original had a Bendix gear, that uses the inertia of the pinion on a screw thread to throw the pinion into gear with the ring.
The Bendix notoriously becomes fouled with clutch wear debris and oil.
Remove the starter, clean the Bendix gear and lubricate with graphite powder - never oil or grease.

More modern starters, and the Hi-Torque versions retro-fitted to Triumphs, had a 'pre-engaged' pinion, pushed into place by a solenoid, identified as a second cylinder on top of the starter.
They are nore difficult to service.

John


Serial Vitesse racer.

Old Blue.  1995-2001
Silverback. 2001-2007
SofS. 2007 - to date.

Logged
Private Message Reply: 1 - 7
Scimher
December 5, 2017, 9:39am Report to Moderator

Posts: 532
Posts Per Day: 0.23
Thanks very much for your prompt response, John - the starter motor was replaced 6 or 7yrs. ago.....The only thing that I have to go on was that I was told that the fault was due to some broken teeth on the flyheel, a few years ago. The problem has got considerably worse.  
Logged
Private Message Reply: 2 - 7
Nick Jones
December 5, 2017, 6:10pm Report to Moderator

Club Member
Posts: 9,933
Posts Per Day: 2.21
Worth removing the starter and doing what John suggests first off as it's free and won't take very long.  Check the condition of the starter teeth - if they are mangled then that won't be helping.

While the starter is out, take a look at the ring gear through the starter hole.  Wear will be noticeable at two diametrically opposed points (or 3 points @ 120º on a 6 cyl) because the engine usually comes to rest near the top of a compression stroke.  The wear will be on the back side.  If the teeth have almost gone then you'll need a new ring gear or a better flywheel assembly.  If they are just ragged and burred then a tidy-up with a file in situ will help.

Nick


Nick Jones
Somerset UK

Vitesse Mk 1.5 Convertible EFI, Survivor of RBRR 2008, HCR & 10CR 2009, HCR 2010, 10CR2011, HCR 2012, 10CR2013, 10CR2015, HCR 2016 & HCR 2017.
GT6 Mk3 Roto - project in progress
Spitfire MKIV son's project now on the road as a daily driver
2.5 PI Saloon now EFI (PIe?), Engine rebuilt and running sweet.  Diff howling...... Survivor of HCR 2013 & 2014 Gone to live in Swansea

http://www.tengaston.plus.com
Logged
Private Message Reply: 3 - 7
poppyman
December 5, 2017, 6:17pm Report to Moderator
Club Member
Posts: 298
Posts Per Day: 0.72
You also dont have to replace the starter.  You can just fit a new bendix, much cheaper than a complete starter and are available on "fleabay" around £8.

Cheers, Tony.
Logged
Private Message Reply: 4 - 7
Scimher
December 5, 2017, 9:33pm Report to Moderator

Posts: 532
Posts Per Day: 0.23
Thanks for the advice, Nick and Tony, will see if I can sort it without having to get someone to strip it all down. I'll start with the starter motor...
Logged
Private Message Reply: 5 - 7
poppyman
December 5, 2017, 10:36pm Report to Moderator
Club Member
Posts: 298
Posts Per Day: 0.72
Quoted from Scimher
Thanks for the advice, Nick and Tony, will see if I can sort it without having to get someone to strip it all down. I'll start with the starter motor...


If you could post a pic of the starter showing the bendix, it would give us a better idea as to the main culprit
Cheers, Tony.
Logged
Private Message Reply: 6 - 7
Scimher
December 6, 2017, 3:43pm Report to Moderator

Posts: 532
Posts Per Day: 0.23
I'll see what I can do, chaps - many thanks!
Logged
Private Message Reply: 7 - 7
1 Pages 1 Recommend Thread
Print

Triumph Torque    Cars    Herald/Vitesse  ›  Defective flywheel ring gear...

Thread Rating
There is currently no rating for this thread
 


Powered by E-Blah Forum Software 10.3.5 © 2001-2008

Latest Blogs-
Steve Weblin

16th December 2017 07:30am gmt
Loxhams - Triumph Car Dealers 54
Rob Pearce

15th December 2017 10:31pm gmt
They Think The Welding's All Over...
more blogs...
Next Group Meetings-
North London & Herts Monday 18th December 20:00
Glasgow Tuesday 19th December 20:00
Shropshire Wednesday 20th December 19:00
West Midlands - 2nd meeting Wednesday 20th December 20:00
Southern Area 2nd meeting Thursday 21st December 20:00
more local groups...
Upcoming Events-
more events...
For Sale-
Spitfire MKIV cylinder head, refurbed not used. Casting 312240, Stamp number 218142. Unleaded inserts, seats triple cut, new valves, guides and springs. Skimmed 0.040 inch. £300. Mob. 07764 860234 email: steve-karen.dee@ hotmail.co.uk
Pair of Stromberg CD 175 carburettors, linkage and mounting nuts. Removed from an American-spec TR6. Looking for £35. Based in Peterborough. Matt George on the forum or phone 07921 853482.
project colander aka 1973 1500tc dolomite - needs lots of welding but is largely complete though partly dismantled . contact dinger on the forum
more adverts...
CLUB TRIUMPH the Club for all Triumphs
© Club Triumph Ltd MCMXCVI - MMXV