Bit of help needed for Dyak loco

Bit of help needed for Dyak loco

This topic has 6 replies, 4 voices, and was last updated 19 July 2024 at 15:39 by JasonB.

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19 July 2024 at 09:32 #742114
Michael Callaghan
Participant
@michaelcallaghan68621
Hi, can anyone please let me know the following please. What size bolts are the used to hold the piston cylinder front plate closed. I know longer have the means to check after having a number of small tools including all my thread gauges pocketed by some toe rag.
Advert

19 July 2024 at 11:53 #742160
Weary
Participant
@weary
“Each [cylinder end] cover is held on by six 3/32″ or 7BA screws, either cheese or hex. heads.”

Source: Model Engineer Magazine, Vol. 71, Issue No. 1746, October 25 1934, page 405
19 July 2024 at 13:34 #742181
SillyOldDuffer
Moderator
@sillyoldduffer
On 19 July 2024 at 11:53 Weary Said:

“Each [cylinder end] cover is held on by six 3/32″ or 7BA screws, either cheese or hex. heads.”

…

Why is nothing ever easy!!! Those two are incompatible, so unless Michael has, or can afford to buy, six of each, he still needs to find out.

I’d roll something like a toothpick in the hole to capture the thread spacing, and measure the indentations in the wood. May be tricky – this is a small thread.

I don’t believe 3/32″ is British Standard, so could be American? Unlikely given the age of the design. In the UK small diameter screws are usually BA, so that’s my bet.

Dave
19 July 2024 at 13:46 #742183
JasonB
Moderator
@jasonb
Dave 3/32″ Whit was common on older models. Stuart Progress for example
19 July 2024 at 15:01 #742201
Michael Callaghan
Participant
@michaelcallaghan68621
I think you need to take a pill mate if you call me Useless michael again. Very useless is ok. But truly you need to get over the name calling.
19 July 2024 at 15:01 #742202
Michael Callaghan
Participant
@michaelcallaghan68621
Thankyou
19 July 2024 at 15:39 #742205
JasonB
Moderator
@jasonb
On 19 July 2024 at 15:01 Michael Callaghan Said:

I think you need to take a pill mate if you call me Useless michael again. Very useless is ok. But truly you need to get over the name calling.

I think Dave wrote “unless Michael” no e
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