*This part replaces obsolete part #: and 4.591-036.0.
|Product Number: 4.591-040.0|
|Weight: 0.02 lbs.|
|Also Known As: Spill Valve, Unloader|
|Shipping: Ships Worldwide|
|This is a genuine Karcher replacement part, it is sold individually.|
When your pressure washer loses pressure, it probably means you have a bad spill valve.
Also known as an unloader valve.
This part allows water to recirculate in the pump when you're not spraying water and is responsible for most of the pressure-related problems with your pressure washer.
We do have an article and video on "How to Replace the Spill Valve on a Karcher Pressure Washer" on our site. Just go to the front page of our site and click on Repair Center.
This part is compatible with the following machines:
K 4000 G (1.133-201.0) Pressure Washer
K 1800 G (1.133-209.0) Pressure Washer
K 5000 G (1.133-109.0) Pressure Washer
K 5800 GH (1.194-103) Pressure Washer
K 6000 GH (1.194-109.0) Pressure Washer
K 2300 G (1.194-110.0) Pressure Washer
K 1800 G (1.133-114.0) Pressure Washer
K 2200 G (1.133-115.0) Pressure Washer
K 1800 IB (1.133-121.0) Pressure Washer
K 1800 AB (1.133-122.0) Pressure Washer
K 2200 IB (1.133-211.0) Pressure Washer
K 2400 HH (1.194-301.0) Pressure Washer
K 2400 HH (1.194-304.0) Pressure Washer
HD 2500 HK (1.194-115.0) Pressure Washer
K 2200 MTD (1.133-120.0) Pressure Washer
G 2301 LT (1.133-213.0) Pressure Washer
G 2300 IB (1.133-214.0) Pressure Washer
G 2401 OH (1.194-505.0) Pressure Washer
G 2500 HT (1.194-307.0) Pressure Washer
G 2000 QT (1.133-601.0) Pressure Washer
G 2650 HH (1.194-508.0) Pressure Washer
G 2500 LH (11944030) Pressure Washer
G 2650 OH (11945130) Pressure Washer
G 2000 MK (11336210) Pressure Washer
G 3000 BH (11946010) Pressure Washer
G 2500 OH (11945120) Pressure Washer
G 2000 ET (11336200) Pressure Washer
G 2600 PH (11944050) Pressure Washer
G 2500 VH (11944020) (Version 1) Pressure Washer
G 2500 VH (11944020) (Version 2) Pressure Washer
G2500PH (11944010) Pressure Washer
K4400G (1.133-208.0) Pressure Washer
G 2600 VH (11944040) Pressure Washer
This item works with the following types of products:
- • Pressure Washer
I did all this with the instruction from the video. Could not have done it without the video, I am a scientist and not mechanically inclined
2. Removed washer front cover.
3. Removed unloader cover with screwdriver.
4. Removed plastic unloader cap screws with torx driver.
5. Removed top spring & seals.
6. Removed broken unloader (spill) valve.
7. Reassembled top spring & seals & new spill valve after lubing seal surfaces with lithium grease.
8. Notes: Clean off any corrosion; no grease on spill valve lower seal surface.
Used allen wrench to loosen 4 bolts holding pump onto the pressure washer motor.
Removed button cap holding black cap on to the pump.
Used torx screwdriver to remove 2 screws on white plastic upper portion piece that houses the unloader valve.
Removed spring, then used large needle-nose pliers to remove unloader valve.
Put grease around green band on new unloader valve.
Reinserted the new unloader valve into the pump.
Put spring and white plastic piece back in place and screwed into place.
Put black cap and button cap back into place.
Reinstalled pump back onto the pressure washer and tightened all 4 bolts.
Hooked up water hose and turned on spigot.
Started the pressure washer and all worked fine.
I ended up having to drill and tap the valve with 10-32 threads. I put in a socket head screw and still couldn't get it out with the vice grips. I finally was able to pry it out by using two screwdrivers under the screw head. The valve cavity was very corroded so I wrapped fine sandpaper around a small drill bit and used my drill to clean it up a little. Installed the new valve and it works fine now.