Every so often when my mac700 is building up pressure and reaches the cut-out point, the valve on the side of the pressure switch (I think it is called the pressure switch unloading valve) seems to stick open and lets air pour out. Therefore the motor runs continuously and never shuts off. Is this a common problem and do I need a new pressure switch or should I adjust something on the valve?
Hi My MAC700 is slow to build up pressure (20 minutes to 120 psi). The previous owner said he put too much oil in it. Any idea what the problem could be? Valves?
Had a similar problem. My Mac700 went from 0 to 120 psi in about 45 sec. (when new) to 2 min 9 seconds. (after three years of service) I brought the valve kit and replaced them (didn't bother to change the dowel pins, afraid I'd do more harm that good trying to pull them) It now goes from 0 to 120 is 1 min 12 sec. I accept the longer time (as compared to a new unit) as normal wear in the remaining parts.
Be cheaper to buy a new unit and replacing them.
mac 700 Question by patrick
Patrick Bernal. Question, compressor will come on, fill to 105psi after drawn down it will bog down and kick out the breaker. when the presser is down and the reset button is pushed on it will start again.
This is a great compressor, except for 1 thing. It's quiet, uses very little electricity, and makes a lot of air for the short time it runs. My only beef is that Makita does not sell replacment parts, they only sell replacement components. The air regulator started leaking after 1.5 yrs, and needs a new rubber seal, which is not available. They'll gladly sell a replacement regulator for $36 but not the $.50 seal. Sounds like the auto industry, making most of their money on parts and service.
This is a high output air compressor with a cast iron pump. It comes in a very compact size with a roll bar handle for added protection to the compressor. The best thing about this compressor is that it is oil lubricated. Oil lubricated air compressors last longer than other compressors because the pump runs at a cooler temperature.
Some of the most common parts that would need to be replaced would be the check valve, the oil sight gauge, the oil dipstick / breather, the regulator nipple, the power cord, and we have even sold one motor cover. I am guessing that it must have cracked and needed a full replacement.
The MAC700 is a great choice for a 2 HP compressor because it is compact, yet powerful....
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