Question about Dewalt Air Tools & Compressors
It seems to run often, but I think the disconnect couplers are worn. What is the parts number for them. I forgot to add that when using the regulator nothing changes on the guage.
GUAGES: Guages read exactly what pressure is on them at the time, there is no bleed down time. If the reading is off at zero it will be off accross the dial. The case may have been hit to knock the guage out of allignment or the needle is bent but that's hard to do unless the plastic cover is broke off.
PRESSURE SWITCH: The pressure switch is the black box under the large pannel right behind the quick connects.
LEAKS: Leaks cause compressors to cycle on and off frequently. They are easily found with soapy water in a spray bottle. The guages and quick connects should be replaceable with off the shelf (Home Depot, Lowes, tool repair shops) similar parts.
REGULATOR: If adjusting the regulator does not affect the pressure at the quick connects, and on the guage, it may be stuck or broken. This could also be the place to look for a leak. Dewalt does make a regulator repair kit, part number 5130027-00.
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Posted on Jan 02, 2017
your correct either the valves are worn or maybe just need cleaning as for the gaskets,idont know what part of the world your in but check out coleman on the internet or failing that ,i have maid these from gasket material suuplied from my local bearing supplier
Posted on Dec 03, 2008
Parts for coleman are available at www.mastertoolrepair.com your compressor is listed as L0502710. If however you like to tinker, you can make a pretty good reed valve out of aluminum can material or other (any ideas?). It is fairly easy to cut, does not last as long as factory stainless steel, but for short term, why not? Good Luck
Posted on Jan 10, 2009
The d55155 unit suffers from regulator problems due to weakness in the design of the manifold. The manifold parts are very light duty metal and will break during installation if not carefull. If you can return the parts to dewalt it may be more efficient to to use a generic pressure regulator from www.grainger.com for about 20 bucks and mount using a couple of 1/4" tees directly off the pressure switch. Remove the hose from the pressure switch that feeds air to the manafold . Install parts so that the quick disconnects, guages and new regulator are accessable from the side. It will not be pretty but problem will be solved for long term. We repair other brands that come with control panels using the same method. Pressure regulators built into a manafold will fail. For demanding customers we have recreated the manafold using 1/4 pipe fittings and refit the gauges and grainger regulator into panel.(lots of work) But leave the safety unloader at the pressure switch. If all you need is a good functioning compressor same time and money and mount to side. Good Luck and email if you have questions or other issues with your dewalt.
Posted on Feb 26, 2009
put a blower on the hose and see if air comes out
very possible there is a blockage in the hose or if you are using quick connects they may have failed
Posted on Apr 17, 2009
I am assuming that your compressor is oilfree type. Lets go over some basics to determine where fault is located. You will need to do some simple tests. If there are leaks the compressor may not reach set pressure. I use soapy water on all connections and on the head/headvalve (remove plastic covers to get to all parts that may leak) while compressor is running. Make repairs as necessary. If still low pressure, while compressor is running and has reached max obtainable pressure (in your case 15 lbs), carefully place finger over intake port hole (remove filter). If the compressor is pumping normally but leaking there will be ample suction at intake and cause the compressor to speed-up when intake is obstructed with finger. If you feel plenty of suction and no visible (soapy water) leaks, then the problem is probably the cylinder /ring is not correctly seating /scratched and air is leaking past cylinder. Make sure that the cylinder /piston ring is properly aligned and that the lip on the vinyl ring is up toward the head. On oilfree compressors you can examine the cylinder by pushing the piston all the way up, then look for scratches neer top of cylinder. If scratched install cylinder kit. If you do not feel suction but rather air blowing out of the intake, then the problem is the headvalve plate/reed valves are leaking. The reeds must seal perfectly on their seats and not be bent or have obstruction. Replace as necessary. Only one other thing to check and that is the intank check valve. Easy to check. Run compressor till you have about 15 + lbs in the tank then unplug compressor. Carefully loosen the inlet hose at checkvalve and listen for air leaking out of tank. If leaking replace checkvalve. Use caution when removing head to try and save the gaskets. If you see any model numbers on your compressor beginning with WL, you probably have a unit built by Campbell Hausfeld and can find parts at www.chpower.com
Good luck on your repair and email if you have other question.
Posted on May 09, 2009
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