Question about Makita Air Tools & Compressors
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Posted on Jan 02, 2017
If this is a no oil unit, more likely your piston and sleeve are damaged and need to be replaced. thy are not that hard to do. when you get your new parts you'll see what I mean. good luck
Posted on Oct 17, 2009
unhook the output line from the pump. run unit for 5 to 10 min. if no problem, check the tank valve at the end of you out put line, it screws into your tank. that valve must shut off at every down stroke of the piston, or air well flow back to the pump. will put an overload on the motor. good luck
Posted on Oct 17, 2009
The motor will run until the pressure switch detects approximately 150psi in the tank. If it never gets to 150psi, it will continue to run. If you are not getting over 50psi in the tank check:
1. that the drain valve on bottom of the tank is fully closed. Don't use a wrench on it but it must be tightly closed by hand.
2. that you don't have any air leaks on the top end of the compressor or on your lines going out of the tank.
If these are OK, your problem lies either in a damaged valve plate or cylinder/piston. You can remove the head and check the condition of both the cylinders and the valve plate. All reeds on the valve plate have to be in good condition with no bends, cracks or warpage from over heating or debris from using the compressor with no air filter. The cylinders should be smooth with no scaring. If a cylinder is damaged you will have to also replace the rings or piston assembly. None of the air compressor companies make an oversized ring set so you can lightly hone cylinders but you cannot have them bored out oversized to correct any damage to the cylinder walls.
Posted on Mar 31, 2011
There should be a pressure regulator with a gauge hooked to it. They usually have a knob that you turn to the right to increase the output pressure. If the compressor itself is not building more then 50 PSI then there is a problem with the unit.
Posted on Jul 16, 2011
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