Pressure washer leakage problem
When I switched on my (Karcher KB 9030) pressure washer for the first
time this year there was no pressure and water was gushing out of the casing. I opened it up and found that the plastic elbow (connecting the high pressure hose to the compressor) was cracked. So I Googled the part number, ordered a new part, fitted it. Easy. I guess the frost must have got to it. Then after a few minutes, use another leak started, identical to the first, but on the inlet side this time. No problem it was only a fine spray and it didn't seem to have any effect on the performance. Then after about half-an-hour's use bugger me it developed yet another leak. This time it's a fairly major leak where the second inlet elbow joins onto the compressor. Photo: http://thedowerhouse.com/pics/leak1.jpg Slightly better close-up of leak 3: http://thedowerhouse.com/pics/leak2.jpg The result of the leak is that when the outlet is closed the motor starts and stops about once a second, and water leaks out of the casing. When the outlet is open everything seems to work fine. I'm not so keen to tackle this problem because it looks like I'll have to remove the metal cover and I suspect it won't be quite so easy to reassemble. Anyone got any experience of this? -- Mike Barnes |
Pressure washer leakage problem
"Mike Barnes" wrote in message . I'm not so keen to tackle this problem because it looks like I'll have to remove the metal cover and I suspect it won't be quite so easy to reassemble. Anyone got any experience of this? -- Mike Barnes So whats the alternative or what have you got to lose? When a pressure washer has not been used for sometime? the idea is to hold the lance in one hand ready to operate the trigger and turn on the water with less force then switch on the PW and operate the lance trigger in short burst till the jet builds up pressure,then open the tap more for more force. |
Pressure washer leakage problem
In article ,
Mike Barnes writes: When I switched on my (Karcher KB 9030) pressure washer for the first time this year there was no pressure and water was gushing out of the casing. I opened it up and found that the plastic elbow (connecting the high pressure hose to the compressor) was cracked. So I Googled the part number, ordered a new part, fitted it. Easy. I guess the frost must have got to it. Then after a few minutes, use another leak started, identical to the first, but on the inlet side this time. No problem it was only a fine spray and it didn't seem to have any effect on the performance. Then after about half-an-hour's use bugger me it developed yet another leak. This time it's a fairly major leak where the second inlet elbow joins onto the compressor. Photo: http://thedowerhouse.com/pics/leak1.jpg Slightly better close-up of leak 3: http://thedowerhouse.com/pics/leak2.jpg The result of the leak is that when the outlet is closed the motor starts and stops about once a second, and water leaks out of the casing. When the outlet is open everything seems to work fine. I'm not so keen to tackle this problem because it looks like I'll have to remove the metal cover and I suspect it won't be quite so easy to reassemble. Anyone got any experience of this? Sounds like the plastic has all rotted. Have you ever used it with any chemicals? -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] |
Pressure washer leakage problem
"Andrew Gabriel" wrote in message Sounds like the plastic has all rotted. Have you ever used it with any chemicals? -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] Or used hot water? |
Pressure washer leakage problem
"Andrew Gabriel" wrote in message
... In article , Mike Barnes writes: When I switched on my (Karcher KB 9030) pressure washer for the first time this year there was no pressure and water was gushing out of the casing. I opened it up and found that the plastic elbow (connecting the high pressure hose to the compressor) was cracked. So I Googled the part number, ordered a new part, fitted it. Easy. I guess the frost must have got to it. Then after a few minutes, use another leak started, identical to the first, but on the inlet side this time. No problem it was only a fine spray and it didn't seem to have any effect on the performance. Then after about half-an-hour's use bugger me it developed yet another leak. This time it's a fairly major leak where the second inlet elbow joins onto the compressor. Photo: http://thedowerhouse.com/pics/leak1.jpg Slightly better close-up of leak 3: http://thedowerhouse.com/pics/leak2.jpg The result of the leak is that when the outlet is closed the motor starts and stops about once a second, and water leaks out of the casing. When the outlet is open everything seems to work fine. I'm not so keen to tackle this problem because it looks like I'll have to remove the metal cover and I suspect it won't be quite so easy to reassemble. Anyone got any experience of this? Sounds like the plastic has all rotted. Have you ever used it with any chemicals? Seems to be grasping at unlikely explanations! 3 leaks all more or less at once round the joints after winter - surely the OP's original suggestion of frost damage is the most likely?? -- Bob Mannix (anti-spam is as easy as 1-2-3 - not) |
Pressure washer leakage problem
In uk.d-i-y, George wrote:
"Andrew Gabriel" wrote in message Sounds like the plastic has all rotted. Have you ever used it with any chemicals? Or used hot water? No and no. Has anyone here taken the metal housing off one of these (or similar), and if so, is it easy to put back together gain? -- Mike Barnes |
Pressure washer leakage problem
In uk.d-i-y, George wrote:
"Mike Barnes" wrote in message . I'm not so keen to tackle this problem because it looks like I'll have to remove the metal cover and I suspect it won't be quite so easy to reassemble. Anyone got any experience of this? -- Mike Barnes So whats the alternative or what have you got to lose? The alternatives are (1) try to repair it, and risk not being able to reassemble it - unless anyone here can help with information, which is why I'm asking, and (2) carry on using it and put up with the noise and leakage when the output is switched off. When a pressure washer has not been used for sometime? the idea is to hold the lance in one hand ready to operate the trigger and turn on the water with less force then switch on the PW and operate the lance trigger in short burst till the jet builds up pressure,then open the tap more for more force. I've not head that before. I do make sure that water is flowing before I turn the electricity on. -- Mike Barnes |
Pressure washer leakage problem
Mike Barnes wrote: When I switched on my (Karcher KB 9030) pressure washer for the first time this year there was no pressure and water was gushing out of the casing. I opened it up and found that the plastic elbow (connecting the high pressure hose to the compressor) was cracked. So I Googled the part number, ordered a new part, fitted it. Easy. I guess the frost must have got to it. Highly likely. Then after a few minutes, use another leak started, identical to the first, but on the inlet side this time. No problem it was only a fine spray and it didn't seem to have any effect on the performance. Then after about half-an-hour's use bugger me it developed yet another leak. This time it's a fairly major leak where the second inlet elbow joins onto the compressor. Photo: http://thedowerhouse.com/pics/leak1.jpg Slightly better close-up of leak 3: http://thedowerhouse.com/pics/leak2.jpg The result of the leak is that when the outlet is closed the motor starts and stops about once a second, and water leaks out of the casing. When the outlet is open everything seems to work fine. The leak is on the high pressure side of the pump head and is causing the auto stop start to get confused. Long term use like this will cause damage. I'm not so keen to tackle this problem because it looks like I'll have to remove the metal cover and I suspect it won't be quite so easy to reassemble. I'm assuming this machine has a swash plate pump, unlikely to be anything else (just looked & it does). There are two parts to the head, the pressure head & the crank, called housing 1 & housing 2 on this diagram http://www.espares.co.uk/diagram/pre...507566?ed=2832 Removing the pressure (26 on the diagram) by undoing the bolts (27) should reveal a gasket which has probably gone. Should be simple to do, just make sure you don't lose any o rings. Shouldn't be any ping****its. Don't attempt to remove the crank/housing 2 because you probably need special tools to get it back. HTH -- Dave - The Medway Handyman www.medwayhandyman.co.uk |
Pressure washer leakage problem
In uk.d-i-y, The Medway Handyman wrote:
Mike Barnes wrote: When I switched on my (Karcher KB 9030) pressure washer for the first time this year there was no pressure and water was gushing out of the casing. I opened it up and found that the plastic elbow (connecting the high pressure hose to the compressor) was cracked. So I Googled the part number, ordered a new part, fitted it. Easy. I guess the frost must have got to it. Highly likely. Then after a few minutes, use another leak started, identical to the first, but on the inlet side this time. No problem it was only a fine spray and it didn't seem to have any effect on the performance. Then after about half-an-hour's use bugger me it developed yet another leak. This time it's a fairly major leak where the second inlet elbow joins onto the compressor. Photo: http://thedowerhouse.com/pics/leak1.jpg Slightly better close-up of leak 3: http://thedowerhouse.com/pics/leak2.jpg The result of the leak is that when the outlet is closed the motor starts and stops about once a second, and water leaks out of the casing. When the outlet is open everything seems to work fine. The leak is on the high pressure side of the pump head and is causing the auto stop start to get confused. Actually I'm pretty sure it's on the low pressure side but the effect seems to be the same. Long term use like this will cause damage. That's what I was afraid of. I'm not so keen to tackle this problem because it looks like I'll have to remove the metal cover and I suspect it won't be quite so easy to reassemble. I'm assuming this machine has a swash plate pump, unlikely to be anything else (just looked & it does). There are two parts to the head, the pressure head & the crank, called housing 1 & housing 2 on this diagram http://www.espares.co.uk/diagram/pre.../kb9030/p/1315 /877/75/507566?ed=2832 Removing the pressure (26 on the diagram) by undoing the bolts (27) should reveal a gasket which has probably gone. Should be simple to do, just make sure you don't lose any o rings. Shouldn't be any ping****its. Don't attempt to remove the crank/housing 2 because you probably need special tools to get it back. HTH Yes, thanks. I'll finish the current batch of jobs, strip it down, and see what I find. I suspect a new part 8 is required, or (if I'm really lucky) just its O-ring. -- Mike Barnes |
Pressure washer leakage problem
On 2008-05-16 17:52:44 +0100, "The Medway Handyman"
said: I'm assuming this machine has a swash plate pump, unlikely to be anything else (just looked & it does). There are two parts to the head, the pressure head & the crank, called housing 1 & housing 2 on this diagram WHat is a swash plate pump and how does it work? Enquiring minds need to know. |
Pressure washer leakage problem
Andy Hall wrote:
On 2008-05-16 17:52:44 +0100, "The Medway Handyman" said: I'm assuming this machine has a swash plate pump, unlikely to be anything else (just looked & it does). There are two parts to the head, the pressure head & the crank, called housing 1 & housing 2 on this diagram WHat is a swash plate pump and how does it work? Enquiring minds need to know. A lovely little animation of how they work: http://www.animatedsoftware.com/pumpglos/swashpla.htm (A former life with anorak friends and a certain interest in diesel hyrdaulic locomotives equipped me with the basic idea. But Google was need for anything more.) -- Rod Hypothyroidism is a seriously debilitating condition with an insidious onset. Although common it frequently goes undiagnosed. www.thyromind.info www.thyroiduk.org www.altsupportthyroid.org |
Pressure washer leakage problem
On 2008-05-17 09:51:49 +0100, Rod said:
Andy Hall wrote: On 2008-05-16 17:52:44 +0100, "The Medway Handyman" said: I'm assuming this machine has a swash plate pump, unlikely to be anything else (just looked & it does). There are two parts to the head, the pressure head & the crank, called housing 1 & housing 2 on this diagram WHat is a swash plate pump and how does it work? Enquiring minds need to know. A lovely little animation of how they work: http://www.animatedsoftware.com/pumpglos/swashpla.htm (A former life with anorak friends and a certain interest in diesel hyrdaulic locomotives equipped me with the basic idea. But Google was need for anything more.) That's clever. I've never seen it before. |
Pressure washer leakage problem
Andy Hall wrote: On 2008-05-16 17:52:44 +0100, "The Medway Handyman" said: I'm assuming this machine has a swash plate pump, unlikely to be anything else (just looked & it does). There are two parts to the head, the pressure head & the crank, called housing 1 & housing 2 on this diagram WHat is a swash plate pump and how does it work? Enquiring minds need to know. Early high pressure pumps like the American CAT or the German Speck work by having pistons driven by a crankshaft, rahther like a car engine. They were extreemly durable, but best run at around 1400rpm, and expensive to make. http://www.catpumps.com/pages/aboutus_work.html The swash plate or axial pump can be run faster, so can use a cheaper 2800 rpm motor and are much cheaper to manufacture. They also have the advantage that performance can be changed just by altering the swash plate angle, so you make one pump and have 6 swash plates. Three piston swash plate pumps are the norm, two piston really need a pulsation damper, four piston are a bit of overkill. Good picture here http://www.animatedsoftware.com/pumpglos/wobble.htm This shows the valves integral with the pistons, they are usually in the head casting. HTH -- Dave - The Medway Handyman www.medwayhandyman.co.uk |
Pressure washer leakage problem
Rod wrote: Andy Hall wrote: On 2008-05-16 17:52:44 +0100, "The Medway Handyman" said: I'm assuming this machine has a swash plate pump, unlikely to be anything else (just looked & it does). There are two parts to the head, the pressure head & the crank, called housing 1 & housing 2 on this diagram WHat is a swash plate pump and how does it work? Enquiring minds need to know. A lovely little animation of how they work: http://www.animatedsoftware.com/pumpglos/swashpla.htm (A former life with anorak friends and a certain interest in diesel hyrdaulic locomotives equipped me with the basic idea. But Google was need for anything more.) |
Pressure washer leakage problem
Rod wrote: Andy Hall wrote: On 2008-05-16 17:52:44 +0100, "The Medway Handyman" said: I'm assuming this machine has a swash plate pump, unlikely to be anything else (just looked & it does). There are two parts to the head, the pressure head & the crank, called housing 1 & housing 2 on this diagram WHat is a swash plate pump and how does it work? Enquiring minds need to know. A lovely little animation of how they work: http://www.animatedsoftware.com/pumpglos/swashpla.htm (A former life with anorak friends and a certain interest in diesel hyrdaulic locomotives equipped me with the basic idea. But Google was need for anything more.) Seems to be a difference in terminology here. What the pressure washer industry would call a swash plate pump is described as a wobble plate pump on this site. http://www.animatedsoftware.com/pumpglos/wobble.htm -- Dave - The Medway Handyman www.medwayhandyman.co.uk |
Pressure washer leakage problem
The Medway Handyman wrote:
Rod wrote: Andy Hall wrote: On 2008-05-16 17:52:44 +0100, "The Medway Handyman" said: I'm assuming this machine has a swash plate pump, unlikely to be anything else (just looked & it does). There are two parts to the head, the pressure head & the crank, called housing 1 & housing 2 on this diagram WHat is a swash plate pump and how does it work? Enquiring minds need to know. A lovely little animation of how they work: http://www.animatedsoftware.com/pumpglos/swashpla.htm (A former life with anorak friends and a certain interest in diesel hyrdaulic locomotives equipped me with the basic idea. But Google was need for anything more.) Seems to be a difference in terminology here. What the pressure washer industry would call a swash plate pump is described as a wobble plate pump on this site. http://www.animatedsoftware.com/pumpglos/wobble.htm Very similar at heart. Let's throw the helicopter version in as well: http://en.wikipedia.org/wiki/Swashplate_(helicopter) -- Rod Hypothyroidism is a seriously debilitating condition with an insidious onset. Although common it frequently goes undiagnosed. www.thyromind.info www.thyroiduk.org www.altsupportthyroid.org |
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