Buy a spare piston ....gasket...and valve rebuild kit know...$18.00 to $28.00.... I wore out the top end piston quite a few times....The yong heng are easy enough to work on
Upvote 0
Yong Heng Not Up To Pressure
- Thread starter MikeAllen
- Start date
Good advice - I ordered all of that and a little more earlier this evening.Buy a spare piston ....gasket...and valve rebuild kit know...$18.00 to $28.00.... I wore out the top end piston quite a few times....The yong heng are easy enough to work on
Upvote 0
Decided to rebuild my older Yong Heng. When reassembling the cylinder to the main unit should I use gasket sealer on the gasket and if so what do you recommend? Come to think of it itās a splash oiler and not under any pressure so sealant probably isnāt needed. Your thoughts?
Upvote 0
Ideally use a new gasket. Otherwise, just be mindful of piston to cylinder head clearance.
Last edited:
Upvote 0
Thanks - did use a new gasket. Decided to go ahead and order a whole new top end assembly. Hope to have it in the next few days.
Upvote 0
Check for carbon bits under second stage piston anti back flow plate. Easy fix. I had simular problem using Royal Puple Syn 100. Changed to Mobil 827 Rarus and no problems since. Important: Be sure to check placement of plate so can reassemble exactly. Bill
Upvote 0
I removed the auto shot of gauge completely several months ago started acting weird. Mine has about 63 hrs running time. Rebuilt the housing ones (from a spare basic YH alu housing) because of a cracked crank case.
Looks like ready to replace the pistons now, the refill takes long time and noticed the line between a first and second stage is not warm even the second stage output I can hold my hand on it.
Looks like ready to replace the pistons now, the refill takes long time and noticed the line between a first and second stage is not warm even the second stage output I can hold my hand on it.
Upvote 0
I had those small stainless ball bearings to leave indents in this brass valve ( loosing air ) See Photo
Upvote 0