Next Day Delivery Available
Will This Part Fit My Appliance?
Choose your brand from the list below to check your model compatibility.
Start typing your model number below to check compatibility.
Part is compatible with 
We are unable to confirm if this part will fit with model number ""Description
Manufacturers Part Number:
- 4.580-663.3
Alternative Part Numbers:
- 4.580-663.0
- 45806630
- 45806633
EAN Number:
- 4039784234932
Latest Product Review(s)
Read All Reviews
7 Customer Review(s)
Worked a treat
Good price , fitted perfectly & repaired my jet wash . All happy here
By Lee - Durham
29th May 2023
Key part
I’ve got a Kärcher 7.85 which cost me a new fuse every time I released the grip on the handle. Nothing to do with the capacitor but everything with the outworn excess current unloader. It’s a lot of work getting to it and prying it out but it’s all done now and the Kärcher works as if new! Thanks to great parts from ransomspares.
By Jozef Wiewel - Cambridge
13th Aug 2021
All genuine Karcher parts
Sticking spill valves, unloader valved are a common fault with the karcher aluminium pumps fitted to the older K and some HD 5 series machines. This type also contains the safety valve for this model K7.85 and opens if the pressure is to high to protect the motor. Pressurepoint UK
By Andrew Sneddon - MIDLOTHIAN
24th Apr 2021
Genuine Karcher part
Genuine Karcher part. Takes about a week for delivery.
By Frank Kerr - Chester
9th Dec 2015
Good product and a karcher genuine parts
By Mr Rui Mendes - Lisboa
25th Jun 2014
gets pressure washer back in action
this little unit controls pump motor,was going to scrap my pressure washer but purchased this unit and within 20 minutes washer was back in working order. Good price and speedy delivery
By Mr James Yeomans - Matlock
26th Nov 2013
Questions And Answers
1 Answer(s)
How do I remove old excess current switch ?.it's very tight doesn't want to move can I test this switch in situ?.
Hi, You need to make sure you remove the retaining pin first, then you can usually pry the current unloader out with a screwdriver in behind the spring.
1 Answer(s)
I have a karcher k 7-85 , and i need a new presure current unloader, but i ame unable to remove the old one
please can you give me some information?
thanks
Hi, there is usually a pin in front of this holding it in the machine. I'd recommend checking Youtube for a video on how to replace this to get a better understanding of what would need to be done.
Customers Also Viewed
Grooved Ring
Grooved ring for a leak proof pressure washer
The high-pressure output and pump...
£3.05
Grooved Ring
Grooved ring for a leak proof pressure washer
The high-pressure output and pump...
£3.05
Grooved Oil Seal
How does a grooved oil seal function on a pressure washer?
A grooved oil seal&n...
£2.95
