---
title: "PTX V31 Nozzle Installation Manual"
canonical: "https://help.gatee.eu/space/GHC/4913168397/PTX%20V31%20Nozzle%20Installation%20Manual"
format: markdown
---
> Macro (toc)

## What's included in the V31 upgrade kit?

The third-generation upgrade kit includes: POM nozzle, O-ring stabilizer, 7x1.5 O-ring, nozzle spring, and a barrel stabilizer.

 

![IMG_8914-20260810-093441.JPG](media://b5de13b8-5a4b-45ab-8a2b-8f0e1ae60a91)

## Installation Instructions for the 3rd Generation Upgrade Kit

 

![image-20260810-110703.png](media://cf762a48-eedd-49f7-b1d4-046cc3b1ba6c)

### For Version V1.0

1. Remove the O-rings that secure the cables to the solenoid
2. Unscrew the rear of the PULSAR S2 engine
3. Remove the nozzle, cylinder, needle, and O-rings located at the rear of the engine
4. Lubricate the front and the O-rings on the new nozzle, then install it in the hop-up chamber
5. Install the spring on the nozzle
6. Lubricate inside of the cylinder and install it on the nozzle
7. Install the 7x1.5 O-ring on the rear of the engine, and install the stabilizer in the center of it.
8. Screw the rear of the engine into the hop-up chamber
9. Remove the O-ring and the barrel stabilizer using tweezers
10. Remove the C-clip and take out the barrel along with the hop-up bucking
11. Remove the old nub
12. Reinstall the barrel along with the hop-up bucking and secure it with a C-clip
13. Install the new nub. It is important to install it with the cutout facing the nozzle.
14. Install the new barrel stabilizer and the O-ring

 

### For Version V22

1. Remove the O-rings that secure the cables to the solenoid
2. Unscrew the rear of the PULSAR S2 engine
3. Remove the nozzle, cylinder and spring
4. Lubricate the front and the O-rings on the new nozzle, then install it in the hop-up chamber
5. Install the spring on the nozzle
6. **Remove** the spring guide from the cylinder
7. Lubricate inside of the cylinder and install it on the nozzle
8. Install the stabilizer in the center of the O-ring on the rear of the engine
9. Screw the rear of the engine into the hop-up chamber

 

> ℹ️ If you have the V22 engine, you can use the nozzle spring, the 7x1.5 O-ring, the nub, and the barrel stabilizer that is already installed in your engine

> ℹ️ For the best possible accuracy, adjust the Dp. We recommend using the lowest possible Dp that your PULSAR S2 engine allows.