Safety valve releases on stroke of motor when it gets around 145 P.S.I. replaced safety valve and still the same. please help

I don't find that model in my database but if the safety valve is popping it is one of only a few issues:
1) The safety valve is weak or defective - run the compressor and watch the pressure gauge and see when it releases. Most compressors cycle on at around 90psi and off at around 120psi - the relief valve is usually set at 130-140psi. If it releases before 130psi I would replace the safety valve.
If it blows off above 130psi...
2) The pressure switch is defective if the unit doesn't shut down at it's labeled pressure (most are 120-125psi)
If it runs beyond the labeled pressure and blows off then replace the pressure switch.
3) If the unit has a pilot valve instead of a pressure switch and the unit builds up past the labeled pressure then you can follow these instructions to adjust https://www.youtube.com/watch?v=6CZ9Hznh6EI

The pressure switch is either out of adjustment or has failed. The compressor should shut off at a much lower pressure than the safety valve (~100 psi)

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/dave_fb2c45146b845cea

how to adjust over head values

Hi,

It is 40:1 (see below)

If this helps, pls leave feedback, if not let me know and I'll try and help some more!

~~Technical Specification~~

~ Engine
Capacity 38cc
Stroke 32mm
Idle Speed 3000rpm
Max speed 13000rpm
Power 1.6kW (2.15hp)

~ Ignition
Manufacturer Walboro
Type of ignition CD
Spark plug Champion
Electrode Gap 5mm

~Fuel
Unleaded Petrol mixed 40:1 with 2-stroke engine oil
Capacty 0.38 litres

~Noise
Max 111DbA (as loud as a very loud Nightclub get those earplugs in!!!)

~Weight
4.7Kg (trust me that is very light for a chainsaw)

~Chain Bar
Length 14" (36cm)

~~Safety~~
As with all chainsaws it is essential to wear full protective equpment, and be aware of others around you. You should wear

Safety Hard Hat with Face shield
Safety Googles
Ear plugs/Ear Defenders
Snug Tight Fitting Clothing
Safety Footware with steel toecaps and non-slip soles.
Heavy Duty Rigger Gloves
Leg Chaps

did u hav piston @tdc power stroke-valves shud slightly clic with ur hand after ajust-mite hav performed it at exhaust stroke! let me know

As I understand it, your air compressor motor runs but you can not build pressure. Is this correct?

Two main reasons:

#1: Your safety valve popped and the air is going straight out the safety valve. You should be hearing a loud hissing noise if this is the case. Press the safety valve back in and you should build pressure. Many such valves have a ring on them (to help you find them). It should be very near the pressure switch.

#2: You have a broken reed valve. A reed valve opens or closes based on the pressure it is under. It allows air to enter the tank on the compression stroke, but will not let it out of the tank as the piston strokes up and down. If it is broken or stuck open, you cannot build pressure.

and #3, a after thought, no extra charge ;-) The rings on the piston may have broken.

For #2 and #3, it will be necessary for you to remove the head to inspect.

Find repair parts at the Coleman web site.

I hope this helps you solve your trouble.

Thanks for your question at FixYa.com

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Thanks

The small black valve is a thermal relief valve. It opens when the water gets up to about 145 degrees. If it is heating up that much in 20 seconds, you probably have a bearing issue.

If you have the manual, check the compressor and normal pressure settings and ratings - 145 psi sounds high and unless you are using huge air tools. You may not need that kind of pressure. It sounds like the relief valve and motor overload are both doing their jobs to protect the system.