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Old 03-09-17, 06:06 PM   #1
listerlad
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Default Fairbanks Morse not hitting and missing.

I took my Fairbanks Morse Z 2hp hit n miss along to The Bredgar and Wormshill Light Railway today and it lost compression because the exhaust valve was being kept open, so adjusted it but now it has been adjusted, it runs every beat and has no control as such over the speed. What is the correct setting of the exhaust valve?


Ollie
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Old 04-09-17, 05:01 AM   #2
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Default Fairbanks Morse valve timing

From what I can work out we have upset the valve timing. does anyone know the seetings or set up for this or where I can get the manuel for a 2hp hit n miss version?


Ollie
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Old 04-09-17, 07:54 AM   #3
chrismac
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Hi, on my dishpan there are timing marks on the cam gears, 2 dots on one and a single dot on the other that line up.

I got my manual from ebay.

If you get no joy I will see if I can find my manual and take a picture of the pages of interest.

Chris

Last edited by chrismac; 04-09-17 at 08:03 AM.
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Old 04-09-17, 08:16 AM   #4
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Did you adjust the valve clearance or something else? Not familiar with the Fairbanks so don't know how it regulates the speed.
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Old 04-09-17, 09:08 AM   #5
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Quote:
Originally Posted by Appletop View Post
Did you adjust the valve clearance or something else? Not familiar with the Fairbanks so don't know how it regulates the speed.
Yeah changed the valve clearence, something I don't think we should of changed


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Old 04-09-17, 10:29 AM   #6
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Quote:
Originally Posted by listerlad View Post
Yeah changed the valve clearence, something I don't think we should of changed


Ollie
First thing to try is to change it back and see what effect it has. The manual certainly won't tell you how to fix it.

Dan
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Old 04-09-17, 01:14 PM   #7
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Just wondered if it gave valve clearances.


Ollie
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Old 04-09-17, 02:33 PM   #8
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I'm pretty sure I just tapped it so daylight could just be seen between the valve stem and rocker arm.
Have you checked that the latch isn't holding the tappet up?

Dan.
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Old 04-09-17, 03:32 PM   #9
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No, I will investigate tonight.


Ollie
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Old 11-09-17, 08:43 PM   #10
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Next thought was the govener, now soaked in WD40 to see what happens. Don't think the weights where traveling in and out. Will try tomorrow.


Ollie
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