northstar power washer 1578812G

   #1  

frogracer

Bronze Member
Joined
Jan 15, 2018
Messages
67
Location
Sealy/Columbus, TX
Tractor
NH T4.120 - ArmstrongAg Grapple, Pallet Fork
Hope someone maybe able to help - I have had the subject power washer for several years but the last few times I have used it I have noticed water continuously squirting out of a small 90 degree nozzle/hose barb that I do not recall happening when new.

Attached are a few pics of the PW -

In the picture that is more of a close up of the pump - the water is flowing out of the small black barb on the lower left of the brass pump casing.

It can also be seen in a few of the manual drawings.

Any insight as to why this is happening - if it should or should not and if not what do you think the repair is would be greatly appreciated.

IMG_3594.jpg

IMG_3595.jpg

IMG_3596.jpg

IMG_3599.jpg

IMG_3600.jpg


Thank you!
 
   #2  

Richard001

Platinum Member
Joined
Jun 25, 2015
Messages
997
Location
Plymouth, MN
Tractor
Jd lx178
I have worked on some power washers, but never had any luck with repairing the pump. I suggest that you go to a dealer who works or sells the pump on your washer. They will be able to give you an idea of what maybe wrong.

Most likely there is some dirt or other foreign material in the valves, or a spring has rusted.

Good luck

Richard
 
  
  • Thread Starter
#3  
OP
frogracer

frogracer

Bronze Member
Joined
Jan 15, 2018
Messages
67
Location
Sealy/Columbus, TX
Tractor
NH T4.120 - ArmstrongAg Grapple, Pallet Fork
Richard - Thank you for the feedback. I was hopping not to do so but will try and find time tomorrow or Friday before leaving for the weekend.

My son wants to power wash this summer to make a little money. He and his friends are hoping to start doing so next week.

Thanks once again
 
   #4  

RANDYT

Veteran Member
Joined
Mar 27, 2006
Messages
2,088
Location
BEECHER CITY, IL
Tractor
KIOTI DK45S
I would say that the black barb area is part of the thermal relief valve. Suppose to open when the internal water temperature exceeds around 190 degrees. After working on pressure washer and their pumps for close to 20 years, sometimes parts can be hard to track down, and the pumps with the aluminum heads are about cheaper to just replace the pump or the entire pressure washer.

Most common issue with the brass head pressure washers is unloader valve issues causing low pressure in most cases, followed by damaged check valves and water seals.
 
  
  • Thread Starter
#5  
OP
frogracer

frogracer

Bronze Member
Joined
Jan 15, 2018
Messages
67
Location
Sealy/Columbus, TX
Tractor
NH T4.120 - ArmstrongAg Grapple, Pallet Fork
Tracked down the part - Thermal relief valve - no one really has it in stock but Comet Pumps but I found an online shop that can get it from them and ship it to me for less time or money than Comet or other stores. It’s a $12 part but most places want $30-40 for S&H. Sorry no go with them.
 
   #6  

Midniteoyl

Elite Member
Joined
May 20, 2013
Messages
4,238
Location
N. W. Indiana
Tractor
Kioti CK3510SE HST, Ford 3400, Gizmow ZTR, Simplicity 7016H
Tracked down the part - Thermal relief valve - no one really has it in stock but Comet Pumps but I found an online shop that can get it from them and ship it to me for less time or money than Comet or other stores. It’s a $12 part but most places want $30-40 for S&H. Sorry no go with them.
If you know the thread size, opening temp and PSI, you could use anyone's valve to replace it (though I'm pretty sure they mostly all the same):

 
   #7  

5030

Super Star Member
Joined
Feb 21, 2003
Messages
12,010
Location
Somewhere, but not there....
Tractor
Kubota M9000 HDCC3, Kubota M9000 HD, Kubota Sidekick UTE
You can buy a replacement pump on Amazon for about 150 bucks delivered.
 
  
  • Thread Starter
#8  
OP
frogracer

frogracer

Bronze Member
Joined
Jan 15, 2018
Messages
67
Location
Sealy/Columbus, TX
Tractor
NH T4.120 - ArmstrongAg Grapple, Pallet Fork
Thanks for all the feedback. I took a chance at a local NorthernTool and they had one in stock by chance. The. Lack hose 90 was cracked at the barb but otherwise they said it should be just fine. Total cost $5.
I also have one on order that will be here in 10-15 days. Son is happy he can start work now!
I was thinking the same on the - can use most any - online. This confirmed it for me.
Cheers
 
   #9  

5030

Super Star Member
Joined
Feb 21, 2003
Messages
12,010
Location
Somewhere, but not there....
Tractor
Kubota M9000 HDCC3, Kubota M9000 HD, Kubota Sidekick UTE
I would say that the black barb area is part of the thermal relief valve. Suppose to open when the internal water temperature exceeds around 190 degrees. After working on pressure washer and their pumps for close to 20 years, sometimes parts can be hard to track down, and the pumps with the aluminum heads are about cheaper to just replace the pump or the entire pressure washer.

Most common issue with the brass head pressure washers is unloader valve issues causing low pressure in most cases, followed by damaged check valves and water seals.
Considering how cheap replacement pumps are today (unlike back in the day when all there was were Cat pumps and they cost a fortune), pretty easy to have a spare on the shelf which is exactly what I have. AR really took the wind out of the cost of a Cat pump. When mine pukes (it's 6 years old), I'll pull off the old pump and replace it with a new one and the old one can go to the landfill.

So far, so good. 2 things I never do and that is, I always keep the PW inside and safe from freezing and two, I run a pre filter on the inlet of the pump and only use rainwater to wash with.

Of course I only use triplex pumps with brass heads and checks.
 
 
Top