Question about Hitachi EC79 13 Amp 2Horsepower 6Gallon OilFree Pancake Compressor

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Will not contain air in tank so has to keep pumping

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The relief valve often goes bad and will leak by so that the air will not stay in... this is a safety valve so do not just plug it off....find a proper replacement part and then replace the old one...


Posted on Nov 07, 2010


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Posted on Jan 02, 2017


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Water in 2005 Nissan Pathfinder gas tank yet to start car or turn key over yet. How do I drain fuel tank of everything?

If the tank does not have a drain plug, you could syphon the fuel from the tank from the filler tube, or disconnect the fuel line at the intake and use the pump to discharge the fuel into a container before it gets to the injectors. Water mixed with fuel should not damage the pump.
And there is no filter in the line, only a screen before the pump inside the tank.
Using the pump in the tank would require you to jumper the pump relay to keep it pumping.

Oct 09, 2015 | Nissan Cars & Trucks


Well Pump Problems The Water Well Tank

2811e7c.jpgOne of the common problems with having a well for you water supply is that you have the maintenance of the water pump and the related things that are necessary to make that all work. One of the most important parts of that system is the water well tank or the water pump tank. This tank is what keeps the well pump from having to turn on and off every time you draw a few drops of water.

In the past the tanks were made with an air valve that injected just a bit of air into the tank every time the pump started. This helped to keep some air in the tank and also gave the annoying problem of air coming out of the faucet at times. To make this better well water pump tanks are now made with a diaphragm that separates the air from the water.
This keeps the water cushion trapped inside the tank. That is great and makes the well tank virtually maintenance free as long as there are not holes in the rubber bladder that separates the water and the air.

There are some easy ways to tell if your well pump tank is not working the way that is should work. And also here are some things that you can do to maximize the capacity of the tank.
  1. Drain all the water pressure out of your system. Then check the air pressure in your tank and adjust it to 2 PSI below the cut in pressure of your pump.
  2. Make sure that your pressure switch is giving you 20 PSI differential between the cut in and the cut out of your pump.
  3. Make sure that your tank is big enough to give you at least 2 minutes run time when your pump starts till it stops.

Now for pressure tank not working
  1. The pump starts and stops rapidly while you are drawing water. This means the bladder has failed in the tank and you have no air in the pressure tank. Replace your pressure tank.
  2. You get a slight hesitation as you are drawing water before the pump. This means that you have too much air in the tank and you need to release some air or increase the cut in pressure on the pressure switch.
  3. If in the summer time you see condensation more than halfway up the side of the tank then you have a bad tank. The tank should never be more than about half full of water. Replace the well pressure tank.

One note to consider. If you are not drawing water and your pressure drops rapidly when the well pump shuts off then it is NOT a pressure tank problem, it is a problem with the check valve in the pump.

This should give you a basic trouble shooting guide to your well water tank or water pressure pump tank.

on Dec 22, 2009 | Plumbing

1 Answer

How do I take apart a dewalt d5141 compr3ssor?

This number is for the D20114 its the safety valve that can not be set to a max basic pressure .
its strange but its not adjustable it can be defect i have one time the same the experience there is not a adjustable Pressure Switch on this model , the moast compressors have a 8 to12 bar adjustable.pressure switch.
Very important This safety valve gives an electronic brake between the pump and to a end of top about 10 bar . if its not switching off then a drain valve opened . and blows all the air out. (but only over 10 bar ) the max pressure on the tank , the moast tools are working on a pressure from 6 to 8 bar.

Checking Safety Valve
WARNING: Risk of bursting. If the safety valve does not work
properly, over-pressurization may occur, causing air tank rupture or
an explosion.
Before starting compressor, pull the ring on the safety valve to
make sure that the safety valve operates freely. If the valve is
stuck or does not operate smoothly, it must be replaced with the
same type of valve.
Draining Air Tank (Fig. 1)
WARNING: Risk of unsafe operation. Risk from noise. Air tanks
contain high pressure air. Keep face and other body parts away from
outlet of drain. Use safety glasses when draining as debris can be
kicked up into face. Use ANSI S12.6 (S3.19) ear protection as air flow
noise is loud when draining.
NOTE: All compressed air systems generate condensate that
accumulates in any drain point (e.g., tanks, filter, aftercoolers,
dryers). This condensate contains lubricating oil and/or substances
which may be regulated and must be disposed of in accordance with
local, state, and federal laws and regulations.
1. Ensure On/Off switch (A) is in the OFF position.
2. Move compressor into an inclined position so drain valve (H) is
at the lowest point (this will assist in removing moisture, dirt, etc.
from air tanks)
3. Place a suitable container under the drain valve to catch
4. Grasp black lever on drain valve.
5. Slowly rotate lever to gradually bleed air from air tank.
6. When air tank pressure gauge reads 10 PSI (275.1 kPa), rotate
valve to the fully open position.
7. Close drain valve when finished

Apr 19, 2015 | Dewalt Air Tools & Compressors

1 Answer

93 4runner slow throttle response or no throttle response and shakes

Hi I'm Peter, First air , fuel ignition is what keeps it going. Pull the air filter out and make sure it
's not clogged up. Next when was the last time you replaced the fuel filter, put some safety glasses on and lay to the side when you remove the filter to keep fuel spilling on you, once you have it off take a clean container and dump the fuel out of the inlet end them blow air through the outlet end into the container. You may see a lot of dirt but make sure there is no water. if you don't mind a little mess then you can hold a container over the end of the fuel line coming from the tank and have someone turn the key on for a second just to see if fuel pumps out to verify the pump is operational. Install a new fuel filter, turn the key on so the pump can build up pressure in the line and start the engine. it may take a couple of tries to get the air out. Test it see if it revs up and take it for a drive to make sure everything is OK. If this isn't it then check back and let me know if or what it's doing. Oh yes the filter is designed to go on one way so make sure you have it going in the right direction.

Apr 19, 2014 | 1993 Toyota 4Runner

1 Answer

Cf2600 won't build pure pressure. Could air intake be stopped up. Had dirt dobber stop up on older compressor. Where is air intake. Can't locate.

No there is not a filter. Since the pump is enclosed in the plastic covers there would not be a way to service it. Now if it is not building any pressure then it could be a few things. First would be the drive belt. (item 125) If it breaks then it won't pump at all. Also if the air hose that exits the pump (item 122) gets a hole in it then it won't fill the tank. A worn head valve plate (item 106), blown gasket (item 105), or a worn piston and sleeve (items 109 and 112-2) can also cause this. If the check valve into the tank (item 16) gets stuck open it too will limit how much the compressor will pump BUT usually it will build up some pressure then just keep running without building any higher pressure into the tank.

Here is a parts diagram so you can see where the belt and other parts are located plus it contains all of the part numbers.

PC CF2600 diagram

Aug 23, 2012 | Porter Cable Air Tools & Compressors

2 Answers

Gas is not getting from gas tank to Carburator .. 1987/88 Wrangler 42. engine was recently rebuilt .. gas tank sending unit was removed and repaired .. fuel line was blown out with air compressor. fuel...

Make sure you have the lines attached correctly on the sending unit and make sure there no small holes in the line. The pump pulls fuel and will draw in air. To make sure the pump is good, attach the tank side to a container of fuel and see if the engine starts. (keep the container below the pump or it can start a siphon and appear to be OK when it's not)
If the repair to the sender involved soldering up a line leak, make sure the line is not still leaking and that the line has not filled with solder.
It's a really simple system...there are no "trick" items there. If everything is intact and the pump is good, it has to work!!!

Jun 10, 2010 | 1989 Jeep Wrangler

1 Answer

I need to drain the gas tank on my 2002 dodge

Hopefully your not attempting to replace a fuel pump in this vehicle or the tank its self?

There is no drain plug you have to purchase a fuel extractor pump. They are manual or electric. You put pump hose in tank threw fill up and start pumping the fuel out into its container.

Apr 26, 2010 | 2002 Dodge Neon

2 Answers

Where is a fuel pump located, for 1994 villager mercury

In the tank!!!

CAUTION Observe all applicable safety precautions when working around fuel. Whenever servicing the fuel system, always work in a well ventilated area. Do not allow fuel spray or vapors to come in contact with a spark or open flame. Keep a dry chemical fire extinguisher near the work area. Always keep fuel in a container specifically designed for fuel storage; also, always properly seal fuel containers to avoid the possibility of fire or explosion.

The fuel pump and fuel tank sending unit are removed as an assembly.
  1. Remove the fuel tank. Please refer to Fuel Tank, Removal and Installation for the procedure.
  2. Clean the area around fuel pump.
  3. Remove the six fuel pump bolts.

    WARNING The fuel pump and fuel tank sending unit assembly must be tilted to remove it from the fuel tank. Do not lift the assembly straight out of the tank, or damage may occur to the sending unit.

  4. Lift the fuel pump and fuel tank sending unit assembly from the fuel tank and discard the gasket.


Apr 18, 2010 | 1994 Mercury Villager

3 Answers

Water tank full (!) in bosch tumble dryer WTE86301gr

As a matter of fact I have solved the problem. The dryer is now fully functioning again. :-)
I'll try to explain how to fix the problem:
The water that condenses in the condensor (doh!) drips down into a container situated below the condensor. The moist air that passes through the condensor is the same air that circulates via the clothes, thus it also contains some lint that the filter doesn't catch. Over time there will be some build-up of lint and mucus (?), clogging the tank AND a sensor that sends a signal to the electronics to start the pump that evacuates the condensed water to the removable tank in the upper part of the machine. This messes up the function of the water evacuation system.
Alright, pull out the condensor and find a hatch in the 'floor' in the farther part of the compartment. Below the hatch you'll find the container that collects the condensed water. Start by cleaning it as thoroughly as you can. There are a few 'nooks and crannies', take your time, also flush with some fresh water and maybe some gentle cleanser to get rid of the mucus. The pump and the sensor for the pump are located in the left part (viewing from front of the machine) of the container. Try to flush there as well.

If this procedure doesn't solve the problem you'll have to disassemble the machine to also be able to remove the pump and sensor housing. I had to do this on mine. Quite a few screws to remove and keep track of, but pretty straight forward if aren't too uncomfortable with 'fixing things'.

I have some pictures of the 'project' somewhere, let me know if you would like to see them or if I may help you some other way.

BR /Hans

Mar 10, 2010 | Bosch Dryers

1 Answer


Going to keep it simple since it started up again and is running, Chances are the fuel filter has come to the end of it's life and needs to be replaced. After saying this you may get away with filling the gas tank a few times and adding fuel injector cleaner to the gas since the new style fuel pump with the filter is also know as self cleaning filters and is good for life till the electric pump fails it self, which has an average life of 150,000 miles. You can get more life out of the pump if you run more then half a tank of gas always, the gas it self is what keeps the electric pump cool and less gas means hotter running fuel pump. 
GM has stopped putting in-line filters in some models since 2004. Other manufacturers have been doing it longer. The fuel sender assembly (pump/regualtor/sock/level sensor) inside the tank has a container on the bottom of it about the size of 1/2 coffee can. All the fuel pick up components are inside of this container. It has a small intake port in the very bottom that filters the bigger debris so that the fuel that is filling the container is fairly clean. The fuel fills the container and a sock(filter) is used at the end of the fuel pumps pick-up tube. Smaller debris that makes it to the sock is then filtered by the sock before entering the fuel pump and simply falls to the bottom of the container.

Todays pumps are much more robust then pumps of old also. We still see more failures of the old style pumps with in-line fuel filters then we do of the newer style. GM calls this a self cleaning system. Any debris that does not go into the canister of the fuel pump assembly falls to the bottom of the tank and any debris that the sock stops falls to the bottom of the canister when the fuel pump is shut off. We are talking very small amounts of debris here too.

Good luck and hope this helps and like mentioned, try running the HHR with more then half a tank of gas and adding fuel injector cleaner for now. 

Jul 16, 2009 | 2006 Chevrolet HHR

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