Gun will not pressure up to shoot - Crosman (4032)

You can check a few things to identify the problem if your Senco FramePro 602 nail gun is not shooting at angles:

Make sure the depth adjustment is adjusted appropriately for the material you are dealing with and the nail size by checking it.
The cannon may not be able to fire at an angle if the depth adjustment is set too high.

Verify the air pressure: Ensure that the nail gun's air pressure is set properly.
For the FramePro 602, a pressure range of 70 to 120 PSI is advised.
The nail gun may stop working if the air pressure is too low.

Examine the magazine for any jammed nails that might be stopping the rifle from shooting properly. If you find any, remove them.
Make sure the magazine is free of any debris and unblock any nails that are stuck.

Verify the angle adjustment: Ensure that the nail gun's angle adjustment is correctly set for the angle you intend to utilize.
The FramePro 602 is capable of firing at 21-degree and 28-degree angles, so make sure that the angle adjustment is set to the appropriate level.

Pump not working. Replace pump.

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When it works without the lance this is a classic sign that the valve body needs to be dissembled and cleaned. You could try buying a universal replacement gun at home depot to see if that solves the problem. If it does not then you need to watch a video and perform the cleaning and it will work like new again.

The air hose between the tank and the gun is clogged, possibly by a bug nesting in it. The second place to look is the regulator on the pot. Insure that you have free airflow from there to the gun.

Sounds like you have a staple jammed in it , so the hammer is stuck.

Most nail guns are labeled with the longest nail/brad they can shoot but are capable of shooting shorter nails/brads. There should be a data sticker on the gun, usually on the magazine rail, or at least in the manual that tells you what pressure to operate the gun at, what guage brads the gun can shoot and the size of brads from shortest to longest it can handle.

Good news, your engine runs
But your pump may be bad

Here's how to test your pump
Check oil as outlined lower down
Disconnect the washer hose and gun
Connect water hose and turn on water and water should pass straight through the pump
Look for clogs in the hose-end where water hose connects to machine

Turn on machine and see if water shoots out pump
If water shoots out of pump, but no water shoots out of gun, then you may have a 'mud-dobber' wasp clog in your washer line or gun

Look for clogs in the end of each water connection.
Now connect washer hose without the gun, tun on the machine, and see if water shoots out of washer hose
Finally, the gun trigger mechanism may be bad
I don't know which gun you have ... but we replaced guns on our machine now-and-then ... google-search power washer guns for a replacement

Check your pump oil
Pump oil is SAE20 or SAE30 non-detergent motor oil
Pump should be no more than 1/2 full of oil
Use plastic hose to drain pump oil
Do not turn machine on its side or turn machine over or engine oil will run into carburetor

The knob on the left of the gun is your fan adjustment. turn it back towards you and it will shoot a stream of paint, turn it forward and it will shoot in a fan patter. The knob at the bottom by the air inlet is your air pressure adjustment. The knob on the back is to remove the needle and spring.
Cheers!

drain your system of pressure. remove your air cap and nozzle from the gun. slowly increase fluid pressure till it comes out of gun. this will clean out debri from gun. reduce pressure so you don't wast anymore fluid.
clean nozzle properly / completely
clean aircap. properly / completely
inspect needle tip for abnormal wear.
if cleaned properly you will find your gun works much better.