Comet axd 3020 will not build pressure - Comet Garden

Found this ... hope it helps ...
" 87025760 Comet AXD3020 replacement pump 2000 psi @3.0 gpm, 3/4" shaft. Fits most 7hp and below engines with horizontal mountings."
Otherwise maybe these guys can advise.. Good Luck! https://www.rjbowers.com/xcart/Comet-AXD3020-Replacement-Pump-87025760.html

On pump assembly page 30 in manual
https://www.northerntool.com/images/downloads/manuals/15781820.pdf

30 weight non detergent works in most pressure washer pumps. available at most auto parts stores.

check your check valves.
or one of the wobble plate pistons is not working right ( broken, broken spring etc)

this is a piston seal issue. You can get a kit to rebuild the pump.

hi there sal rick85

sounds like the unloader valve is not working or stuck closed , check the setting of the unloader valve may be set too high, the unloader must open in odrder to cycle water back to inlet side of pump - if not builds up heaps of pressure , stalls the engine - service the un loader valves on the pressure head

take look and let me know - what brand your blaster unit is i know its honda but what pump
comet - axd, lw/zw, - in line or axial cam

in the mean time here is good web site on power washers

http://www.the-power-washer-advisor.com/

or go to
http://www.the-power-washer-advisor.com/pressure-washer-pump-trouble-shooting.html

cheers pauly46

These AXD pumps usually do not require a rebuilding process. What happens is the unloader / bypass valve gets stuck and you do not get any output pressure. What you can do is tip you pressure washer so that the input and output fittings are vertical and actually dump oil into the water supply hole. (3 oz at least) Slowly pull the recoil (ign off) and add a bit more oil and let it sit overnight. Then the next day once again pull the recoil through and let it sit another 10 minutes. Then connect all hoses (Purge the air in the garden hose) BEFORE connecting the main water supply and start the unit then running at MAX SPEED rapidly fan the wand trigger. What your doing is cycling the unloader valve. Do not do this for more than 2 minutes if the pressure does not suddenly start. IF the pressure builds continue at lease another 30 rapid cycles of the wand trigger.
I lost count on just how many pressure washers I have brought back to a good working service life by just doing the above. I do know it is a substantial number.
Give this a try before you go off on the need to rebuild the pump avenue.

You should use what the pump manufacturer recommends. Typically a 30wt non-detergent (non foaming) oil. Do not over fill. If there is a sight glass half way is normal. Or if it has a dip stick follow the mark there.
Here is a great link for pressure washer parts and info
This link goes right to oil page:
http://pressure-washer-parts.com/shopdisplayproducts.asp?Search=Yes

Normally, it is one of three things.

1.) The high pressure seals are bad

2.) There is debris in the check valves

3.) the unloader is stuck in by-pass.

aftermarket oil will be fine just use same grade of oil,all manufacturers want that extra kick,