UK Stationary Engine Forum
 

Go Back   UK Stationary Engine Forum > Main Engine Section > Restorations Section

Reply
 
Thread Tools Display Modes
Old 13-03-18, 07:29 PM   #41
nickh
Forum Supporter 2013
 
nickh's Avatar
 
Join Date: Feb 2011
Location: Middx.
Posts: 13,198
Default

Simply that you can flick a mag over on the bench a deal faster than cranking speed.

Open circuit measurement is never a good thing but depending where the break is, it could soldier on for ages.

NHH
nickh is offline   Reply With Quote
Old 21-03-18, 06:03 PM   #42
woodsman
Senior Member
 
Join Date: Apr 2017
Location: Gods own county - Yorkshire
Posts: 324
Default

Got heads off and cylinders - bores look OK. Had a peer inside and it doesn't look too gunky.
Left hand piston had only one seized ring which slowly freed up with a little heat and GT85. Right hand piston is more of a challenge - all rings seized. I have managed to free up one compression ring using same method but the other are proving more stubborn. I'm wary of applying a lot of heat in case I ruin the temper. Any advice on safest way to proceed - don't want to snap any as I did with a Villiers a while back.
__________________
Regards Paul

Tha can alus tell a Yorkshireman - but tha can't tell him much.
woodsman is offline   Reply With Quote
Old 21-03-18, 06:39 PM   #43
1956ld1
Senior Member
 
1956ld1's Avatar
 
Join Date: Jun 2015
Location: galway ireland
Posts: 287
Default

Lots of oil/diesel/anything that will lubricate etc. and very gentle heat to the piston itself ( since its aluminum it should expand at a faster rate than the rings ). I would then get to work with a small screwdriver such as a phase tester. This is my usual method but I could be wrong.
Josh.
1956ld1 is offline   Reply With Quote
Old 22-03-18, 04:53 PM   #44
woodsman
Senior Member
 
Join Date: Apr 2017
Location: Gods own county - Yorkshire
Posts: 324
Default

OK - first the good news...

Cylinder heads pickled in citric acid solution for a couple of days came out nicely -see pics. Wondering whether to do the barrels as well.

Whipped out the valves from one cylinder (that little pin retaining the spring cap is so much easier than the spilt cotters used by Villiers) and seats look pretty good but lapped them in anyway to remove slight pitting. Cleaned up valve stems, guides, springs and inlet / exhaust. Re-assembled and all operating smoothly.

Now the bad...

Despite patiently heat cycling and applying loads of Plus Gas, GT 85 and careful scraping with a scalpel the second compression ring came out in two pieces. Looking at the break I think it may already have been cracked.

So, can anyone suggest where to get replacements - I'd probably also go for a couple of oil control rings just in case. Any advice gratefully received.
Attached Images
File Type: jpg image21.jpg (86.5 KB, 27 views)
__________________
Regards Paul

Tha can alus tell a Yorkshireman - but tha can't tell him much.
woodsman is offline   Reply With Quote
Old 22-03-18, 05:48 PM   #45
1956ld1
Senior Member
 
1956ld1's Avatar
 
Join Date: Jun 2015
Location: galway ireland
Posts: 287
Default

Quote:
Originally Posted by woodsman View Post
OK - first the good news...

Cylinder heads pickled in citric acid solution for a couple of days came out nicely -see pics. Wondering whether to do the barrels as well.

Whipped out the valves from one cylinder (that little pin retaining the spring cap is so much easier than the spilt cotters used by Villiers) and seats look pretty good but lapped them in anyway to remove slight pitting. Cleaned up valve stems, guides, springs and inlet / exhaust. Re-assembled and all operating smoothly.

Now the bad...

Despite patiently heat cycling and applying loads of Plus Gas, GT 85 and careful scraping with a scalpel the second compression ring came out in two pieces. Looking at the break I think it may already have been cracked.

So, can anyone suggest where to get replacements - I'd probably also go for a couple of oil control rings just in case. Any advice gratefully received.
I got mine from cox and turner.
1956ld1 is offline   Reply With Quote
Old 22-03-18, 06:50 PM   #46
woodsman
Senior Member
 
Join Date: Apr 2017
Location: Gods own county - Yorkshire
Posts: 324
Default

Cheers Josh. Already dropped them a line but thanks anyway. Fingers crossed.
__________________
Regards Paul

Tha can alus tell a Yorkshireman - but tha can't tell him much.
woodsman is offline   Reply With Quote
Old 29-03-18, 12:32 PM   #47
woodsman
Senior Member
 
Join Date: Apr 2017
Location: Gods own county - Yorkshire
Posts: 324
Default

Still working on freeing up the remaining rings but I have a new question or two.

My copy of the working instructions states clearly on the front cover 'T.300 Mk One, Serial letters TE'. However on the first inside page dated June 1965 the heading reads Type T.300 MK II - and someone has stencilled the word 'one' over the top.

Magneto drive cover is rounded as stated previously.

Looking at the parts diagrams shows two compression rings and one oil control ring per piston - all at the top. My pistons have an additional oil control ring at the bottom. Any ideas?
__________________
Regards Paul

Tha can alus tell a Yorkshireman - but tha can't tell him much.
woodsman is offline   Reply With Quote
Old 29-03-18, 01:11 PM   #48
Lister M
Senior Member
 
Join Date: Jun 2009
Location: Bedfordshire
Posts: 4,461
Default

In my experience you cant always rely on manuals particularly when you have one that's been changed like yours. A lot of the time they tell you the basics only.

Martin P
__________________
Lister optimum melius quam ceteri, quid tibi pro vita.
Lister M is online now   Reply With Quote
Old 29-03-18, 07:26 PM   #49
1956ld1
Senior Member
 
1956ld1's Avatar
 
Join Date: Jun 2015
Location: galway ireland
Posts: 287
Default

I think one of my Normans has 4 rings aswell
1956ld1 is offline   Reply With Quote
Old 03-04-18, 05:58 PM   #50
woodsman
Senior Member
 
Join Date: Apr 2017
Location: Gods own county - Yorkshire
Posts: 324
Default

Next question.
Am I right in thinking the T300 has a Solex carburettor and, if so, what is thread size of the inlet?
__________________
Regards Paul

Tha can alus tell a Yorkshireman - but tha can't tell him much.
woodsman is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 12:08 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.