SOURCE: I have a Sullair 185 air compressor. The engine
your not return balve is stuck open or your valves are sticking the pressure from the tank is going back to the pump so when the compressor goes on the compress stroke its very hard as it has to open the valve with pressure behind it its hard to explaing buddy but on the tank you wil see anon return valve from the pump unscrew it and inside is a rubber with a spring turn the rubber around and try this if doesnt work you need to inspect the valves (if sticking) good luck
SOURCE: I have a 900xh 350 psi sullair compressor the
Check the piping between the tank, regulator and governor. Given the spike, it's a fair guess some trash has lodged in or gunked up the regulator,perhaps the governor.
SOURCE: Cannot find a Service Manual for Sullair
in your browser put this link http://pdfservicemanual.com/ebook/sullair-compressor-rotary
SOURCE: i need a workshop manual
You can contact your local Sullair distributor. Many of them will email a copy if it is available. You can find your dealer by going to Sullairs web site and on the industrial tab, look for reps.
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