The 2 filters are just pieces of foam one is a 1"×1"×1.5" rectangular chunk of foam that goes around the rod for manual oiler to keep gunk out of the oil pump compartment and the manual oiler portion of the pump and the other is 3/8"×3/8"×1.5" rectangular strip of foam that gets threaded in one hole and out the other hole on the oil pump body so that a little piece of foam sticks out of each hole to keep gunk out of the diaphragm portion of the pump. To clean and test the the check valves you have to remove the inlet and outlet lines which are in the bar oil tank and connect to the backside of the oil pump. The oil pump diaphragms are NLA but its a simple diaphragm that can be cut from a sheet of 1/64" nylon thread insert Buna N Nitrile. The oil pumps on these saws are impulse operated not gear driven and if your having issues with flow one thing you can try is thinning your bar oil down just a tad with something like kerosene or diesel. The earlier late seventies models of that series of saw had the exact same oil pump but it had a flow adjustment screw for the auto oiler portion but for some reason they did away with the adjustment screw and switched to the non adjustable oil pump sometime around 1980. I have a 1979 Poulan 3400 countervibe with the adjustable oiler. The 3400's are really good running saws that are super easy to work on and pretty much bulletproof and its too bad that some of the parts are now NLA but they made alot of the saws so alot of the parts can still be found on places like ebay.
It appears, when you did the rope trick the port was open when you put the rope in. Always make sure the piston is above the port so you don’t have what happened to you. A piece of rope was probably stuck in the rings and lowered the compression.
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For future reference a small cordless impact will loosen both the clutch and flywheel nuts without the use of a piston stop.
The 2 filters are just pieces of foam one is a 1"×1"×1.5" rectangular chunk of foam that goes around the rod for manual oiler to keep gunk out of the oil pump compartment and the manual oiler portion of the pump and the other is 3/8"×3/8"×1.5" rectangular strip of foam that gets threaded in one hole and out the other hole on the oil pump body so that a little piece of foam sticks out of each hole to keep gunk out of the diaphragm portion of the pump. To clean and test the the check valves you have to remove the inlet and outlet lines which are in the bar oil tank and connect to the backside of the oil pump. The oil pump diaphragms are NLA but its a simple diaphragm that can be cut from a sheet of 1/64" nylon thread insert Buna N Nitrile. The oil pumps on these saws are impulse operated not gear driven and if your having issues with flow one thing you can try is thinning your bar oil down just a tad with something like kerosene or diesel. The earlier late seventies models of that series of saw had the exact same oil pump but it had a flow adjustment screw for the auto oiler portion but for some reason they did away with the adjustment screw and switched to the non adjustable oil pump sometime around 1980. I have a 1979 Poulan 3400 countervibe with the adjustable oiler. The 3400's are really good running saws that are super easy to work on and pretty much bulletproof and its too bad that some of the parts are now NLA but they made alot of the saws so alot of the parts can still be found on places like ebay.
Thanks for all the great information! It has helped me and will hopefully help more folks in the future who find this video.
It appears, when you did the rope trick the port was open when you put the rope in. Always make sure the piston is above the port so you don’t have what happened to you. A piece of rope was probably stuck in the rings and lowered the compression.
I think you might be spot on. I learned the hard way on this one, but it worked itself out and compression returned, thankfully.
Flat blade screws, is this 1956? My old Poulan uses a mix of torx and phillips .😂
And they were tight for sure. I would have preferred allen or torx for sure. I think it was made in the early 80's.