---
title: "Installation instruction for the PTX  V22 upgrade kit"
canonical: "https://help.gatee.eu/space/GHC/4577427458/Installation%20instruction%20for%20the%20PTX%20%20V22%20upgrade%20kit"
format: markdown
---
### What's included in the PTX upgrade kit

The upgrade kit includes: aluminum nozzle, nozzle spring, spring guide, nub, barrel stabilizer, and a 7x1.5mm O-ring

![IMG_7571-20260407-112003.JPG](media://19bbd296-0226-448e-b5d4-276ea531e703)


### V1 vs V22 – Engine Design Differences

![PTX_V1_ENG v2.png](media://e4023533-2975-4d0c-bbe5-0fc323463097)

![image-20260409-073310.png](media://b06f0d7e-7e8e-4949-9174-56374f2538e8)



### Installation Instructions for the PTX pistol Upgrade Kit

1. Remove the two 8x1 O-rings securing the hoses to the solenoid
2. Carefully disconnect the cable from the solenoid using tweezers
3. Unscrew the rear of the S2 engine
4. Remove the O-rings from the center of the rear section of the S2 engine

![IMG_7515_260402-1350-20260402-120344.jpg](media://36b2e8ed-ea2b-4c46-b667-8d05ef02c3f3)


5. Remove the cylinder, spring, needle, and nozzle from the front of the S2 engine

![IMG_7516_260402-1352-20260402-120405.jpg](media://31ea77b4-547d-4a11-bcb7-0188e8b1e8fe)

![IMG_7534_260402-1355-20260402-120529.jpg](media://c67f7047-e5a4-4f89-8914-46004a72487d)

![IMG_7519_260402-1358-20260402-120434.jpg](media://e32c6bf5-4853-4670-8f4c-e968b1c8d84a)

 

6. Clean the old grease from the engine

![IMG_7520_260402-1402-20260402-120219.jpg](media://5a8040c6-f0d6-4677-bb94-1422364440e0)

 

7. Apply new grease to the rear of the engine in the area shown in the photo

![IMG_7521_260402-1413-20260403-043944.jpg](media://83a59ba2-4361-409a-a216-fb92db5657cf)

 

8. Apply grease to the O-ring at the front of the S2 engine

![IMG_7525_260402-1420-20260403-044032.jpg](media://36e26b8f-7a65-48d6-9188-47d82cfa15fe)

 

9. Apply grease to the O-rings and the front of the new PTX aluminum nozzle

![IMG_7523_260402-1418-20260402-121839.jpg](media://16daffec-86ca-4045-bc8f-7d9f64b7cea8)

 

10. Install the spring guide inside the cylinder. Make sure it is installed in the correct direction. The flat part of the guide should be at the bottom of the cylinder.
  
11. After installing the guide, lubricate the center of the cylinder

 

12. Install the new nozzle on the front of the S2 engine

![IMG_7526_260402-1423-20260402-122352.jpg](media://b9d13eea-f16f-444b-bed2-1c556d81d3af)

 

13. Install the new-generation spring on the nozzle


14. Place the cylinder with the guide attached onto the spring

![IMG_7531_260403-0632-20260403-044629.jpg](media://13da744c-75e2-43ae-9934-4aeab14b2bf8)

 

15. Install the 7x1.5mm O-ring at the rear of the S2 engine as shown in the photo

![IMG_7522_260402-1416-20260402-121607.jpg](media://16f6303f-54ae-48c8-8cc9-d1bf019d21a7)

 

16. Screw the two parts of the S2 enigne together

![IMG_7532_260403-0634-20260403-043916.jpg](media://9c988dc0-df39-4f0c-98f4-1d2717abe685)


17. Remove the O-ring and the barrel stabilizer using tweezers

![IMG_5396-20260127-083237.JPG](media://1fe56b55-4f19-45f5-81b6-696a74a32f52)

18. Remove the C-clip and take out the barrel along with the hop-up rubber

![IMG_5398-20260127-083239.JPG](media://fd181d37-108c-47ec-bdc4-cdddfecce639)

![IMG_5394-20260127-083234.JPG](media://f6c99b12-30d6-4ba9-a82a-0b41f361fa47)

19. Remove the old nub
20. Reinstall the barrel along with the hop-up rubber and secure it with a C-clip
21. Install the new nub. It is important to install it with the cutout facing the nozzle.
22. Install the enlarged barrel stabilizers and O-ring

 

> ⚠️ **Attention!**
> ⚠️ 
> ⚠️ If you feel excessive resistance when screwing the engine apart, the 20x1 O-ring on the back of the engine has likely come loose.

> ⚠️ **Attention!**
> ⚠️ 
> ⚠️ Before installing the engine in the PTX pistol, pressurize it to check for air leaks. The main cause of leaks may be an improperly installed 7x1.5 O-ring on the rear of the engine


> ℹ️ **Information**
> ℹ️ 
> ℹ️ We have discovered that a small batch of upgrade kits was shipped without O-rings installed on the nozzle.
> ℹ️ 
> ℹ️ If you received a nozzle from this batch, you can use the O-rings from the older nozzle model. The O-rings in both generations of the nozzle have the same dimensions.
> ℹ️ 
> ℹ️ ![image-20260416-090204.png](media://241d595d-60ce-44f2-8878-41533e618b6f)



![no-oring-here.jpg](media://d756dc1c-6adf-43da-a1b4-b15f2f00ff2e)