Question about Campbell Hausfeld 2000 Psi Gas Pressure Washer PW2002

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Chemical injector not working

Order new check valve and will not pick up chemical

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Check that the suction tube orifice is not clogged.

If there is no detergent , then filter on detergent suction tube may be clogged.Remove filter, clean with fine needle and rinse with warm water.

See here.

Check also the websites below:

Troubleshooting Guide

CampbellHausfeld Pressure Washer Troubleshooting

Pressure Washer

Pressure Washer Problems And Pressure Washer Troubleshooting

If still no luck, ask directly to Campbell Hausfeld , using Ask a Question Form.

If you cannot find any solution use the Campbell Hausfeld Service Center Locator

Posted on Jan 26, 2009

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Hi I had a look on the Cambell Hausfeld site. There is a similar problem and suggested solution on the following page of their website:

Also if this isn't useful you could ask them a question at the following link:

Hope this is some help. You can also find a manual for your pressure washer at their website.

Posted on Jan 25, 2009

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I prefer to use a pump up garden sprayer for all chemicals/cleaners. Always check prior to using the dispenser/injector that the agent you use won't adversely affect the pump.

Posted on Jan 25, 2009

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What type of chemical... perhaps the injector is being clogged.... something new to what you usually use ?


Posted on Jan 25, 2009

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1 Answer

Will not pick up paint

Hi Dan,

Yes there is a second ball valve; it is the outlet valve located inside the piston. When you remove the inlet housing to access the inlet valve and its parts, you can partly inspect the outlet ball valve which you can see in the end of the piston; check that it is free to move and nothing is stuck in it. Another thing that can stop the sprayer from priming is the priming circuit is blocked up, either the bypass valve or the return hose or both. This happens when you don't flush this out at the end of the day.

Sep 16, 2014 | GRACO INC 210 ES Airless Sprayer

1 Answer

How to install replacement packings

I guess you have found out how to do this by now, but if not its quite easy. These instructions apply to all the Graco St series II sprayers, so the repair kit (Graco # 244-194) contains all the parts to service these different sprayers and you may not need them all for your pump. The back of the kit shows the order in which the parts are installed. Follow it carefully.

The first thing to do is open the repair kit and squirt engine oil into the blisters that contain the packings so that the leather packings soak it up while you are working. Note that the kit will not use all the parts, as it is good for several different pumps, so you need to keep a careful watch on which parts you need.

You need to repack the pump with it held in a bench vice, so first remove it from the sprayer: Disconnect the pump output hose and the suction assembly, then push out the pin that holds the piston into the gearbox piston, slacken the locking ring and unscrew the pump.

Grip the inlet valve body (the lower tapered part) in the vice on the 2 flats. Unscrew the main body and set it aside, take the inlet valve housing out of the vice and remove the valve parts, noting the order of them; you will be reusing the valve seat and cage.

Put the main body upright in the vice and remove all the parts: Unscrew the brass packing nut and tap the piston out with a suitable tool, taking care to catch it. Remove the top packings and the O-ring on the end that goes into the inlet valve housing, clean the pump body including the outlet connection, and inspect the inside of the cylinder to check that it is not scored; if it is, you will have to replace it otherwise the scores will tear up the new packings.

I always keep the old packings in a stack to check the order and number of them when I install the new ones later.

Now remove the packings from the piston, keeping the parts together to check the right order when you install the new ones. There's a drawing on the back of the kit but having the real ones on the bench is a helpful check.

Clean the piston rod and check that the end that goes through the top packing is not scored and replace it if necessary. Rebuild the packings onto the rod being careful to use the correct spacer that goes on first; the thick one is for the rod that does not have a wiper at the other end. Do this with the flats in the end of the rod gripped in the vice. The packings must be installed so that the outer lips face up towards the end of the rod with the hole for the piston pin. The packings are three plastic and two leather between them supported at both ends by spacers. Before screwing in the outlet valve housing (the stud) that keeps the packings in place, check that the valve seat is OK, then install the wiper ring if there is one on the stud with the lips facing the opposite way from the other packings. Install the outlet ball and apply some Locktite on the screw threads and screw in the stud until it is firmly tight (Graco says 3 ft-lbs if you have a torque wrench).

Install the packings into the pump body, taking care again to get them in the right order with the lips facing down into the pump (this will be against the fluid pressure). Install a new O-ring on the brass nut and screw it in until it just contacts the packings but does not compress them. Turn the body upside down in the vice. grease the top couple of inches of the piston and push it through the packings. You will have to tap the rod through. Now tighten the brass nut; it is tricky to get the torque right so if you have a torque wrench tighten to 5 ft-lbs or an extra 1/2 turn from hand tight. Don't overtighten as this will accelerate wear and under tight leads to leaks. Install a new Teflon O-ring on the body end that screws into the inlet valve housing.

Now service the inlet valve and its housing. Remove the Teflon O-ring that sits under the inlet valve seat and the thick washer inside where the suction assembly goes. Clean all the parts thoroughly including the valve seat and cage. Examine the valve seat land where the ball will sit to ensure that it is not pitted; if it is you can turn it over to the other side if that is OK, otherwise you will need a new inlet valve seat. Install a new O-ring that goes in the groove under the valve seat.

With the inlet valve housing gripped on the 2 flats, in the vice, install the inlet valve parts; first the valve seat, then the new inlet ball and finally the valve cage with the legs downwards around the ball. Grease the threads on the end of the pump body and the O-ring on the end of it. Screw the body into the inlet valve housing and tighten it firmly but not too much (the seal does not depend on it being tight)

Now install the pump section into the gearbox housing. When it is in far enough, the top of the pump body will be about flush with the inside of the hole that it comes through. Now install the piston pin; this is tricky as you need to line up the hole in the crank piston, with the hole in the rod, so you may have to first screw in the body too far and rotate the rod inside it before you can push in the pin which requires that you also lift the retaining spring. Once the pin is in place, rotate the pump body until the top is just flush with the inside of the bottom of the gearbox housing, then tighten the locking ring. Reinstall the outlet hose and inlet suction assembly.

Jul 15, 2014 | GRACO INC 390 Stand Airless Paint Sprayer

1 Answer

My graco linelaser 3900 IV pulsates/winks

Hi Brendan,

Your LineLazer is probably single stroking. This means that one of the 2 valves is not closing properly so that the pump is only working on the down or the up stroke. You need to switch off, depressure and open up the pump lower by knocking the lugs on the conical housing. Be careful not to lose any parts and note their order. clean out the inlet velve parts where the problem is usually found. With the inlet valve housing removed check the outlet valve in the end of the piston; use a small screwdriver and a torch; you will have lie on your back to do this. Call Lion Industries on 01543 251 560 if you still have a problem.

David Dundas

Jan 19, 2014 | GRACO INC LineLazer IV 200 HS Airless Line...

2 Answers

Graco manual

May be clogged. Push out roll pin with a pin punch and remove assembly.Check plastic pices for broken parts ( black). Put pump in water make sure it's delivering material with valve out. Ports on valve are not that big and do clog.

Oct 24, 2013 | GRACO INC Ultra Max II 1095 Premium...

1 Answer

I installed a new grease cartridge in my grease gun and grease does not come out when triggered.

If the gun was working properly before you changed the cartridge, The gun is air-locked
Two things: 1. Make sure the bottom rod is pushed in. 2. Holding the gun by the handle on the top left of the gun, below the hose there is a little metal valve. Push that vent valve down and pull the trigger repeatedly until grease starts to come out.
If that doesn't work. Remove the grease hose, hold the vent valve down, pull the trigger a few times. Then release the valve and pull the trigger until grease comes out. Replace the hose.
And if that doesn't work. Sometimes when you put in a new cartridge the metal "washer" that actually pushes the grease up the cylinder will get caught at the bottom of the new cartridge. Make sure the washer will move freely into the cartridge.
That should do it!

Jan 14, 2011 | Lincoln Automotive Pneumatic Grease Gun...

1 Answer

I HAVE A MODEL sx55nxpcd-7443 ailess sprayer that has not been used in 4yesrs I tried to use it today I put a bucket of water for the pick up tube but nothing happens Ihave also missed placed my maunel...


When you say nothing happened.
If the machine doesn't run at all, check the cord and plug.
If the machine doesn't pick up paint, read the following:

There are 2 steel balls inside the sprayer.
The first one is in the pipe at the first joint > this ball keeps prime in the pump head.
The second ball is 5" higher, and it is opened and closed by the prime valve
These balls can rust and then the sprayer needs to be replaced
Always store sprayer filled with kerosene

The prime valve goes bad too
And the intake can be clogged with wasp nest or paint.

Let's say your prime valve is okay, and the pipe is not clogged.
Tap the pipe where the ball is located while the machine is running.
See if you can loosen the ball.
If you can't loosen it, take the pipe apart, but be careful because the ball has to fit perfectly to hold the high pressure of a paint sprayer.

If you can get the machine to prime, then tap the next ball to see if machine will fill the hose.

Oct 22, 2010 | Campbell Hausfeld Airless Spray Guns &...

2 Answers

Wagner Paint crew - No pressure

In order of likelyhood:

1. There is an inlet valve where the paint first enters from the hopper. With the machine off, you can poke your finger all the way down the hole. It's spring loaded and will depress abouta quarter inch. If the inlet valve is stuck no paint will pump in PRIME or SPRAY position.
2. In SPRAY position. Motor runs for a few seconds then turns off. This means the pump is working. When you pull the trigger, if you get poor pressure, the problem is in the gun. Unscrew the handle and remove the filter. Clean out everything you can, and replace filter if necessary. Also try turning the spray nozzle 180 degrees and spray to clear if necessary.

there are more things that can go wrong, but these are the most likely.

Jul 08, 2009 | Air Tools & Compressors

2 Answers

AL2340 will not prime. Motor runs but cannot get it to prime

I worked at a tool rental center when I was going to college and learned many useful tips / tricks about airless sprayers. Airless sprayers have two check valves/balls that can stick on their seats or stay open due to chips of paint on seat. Easy method to prime is to remove intake filter from machine, tilt the machine back far enough so that the pick-up tube is pointing up high enough to pour water in tube until full; hold in this position and turn on machine. If water is sucked in turn off machine and tilt machine into pail of water and restart to check for prime. If it still will not prime remove water from pickup tube and use air pressure into tube with bypass valve open. Air pressure will attempt to release the stuck lower check ball. If air pressure does not release stuck ball you may have to use physical pressure against ball. If lower check ball was stuck you can assume that the upper check ball is probably stuck also. An aid to loosen stickey valves is to pour solvent into pickup tube with machine tilted back as before leave overnite. Enjoy

Dec 09, 2008 | Campbell Hausfeld Airless Spray Guns &...

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