---
title: LockNLube Pistol-Grip Grease Guns – Heavy Duty & Premium Models (LNL153-450 & LNL252-450) - Service Kits
description: Help
---

[Skip to content](https://kb.macnaughtgroup.com/locknlube-pistol-grip-grease-guns-heavy-duty-premium-models-lnl153-450-lnl252-450-service-kits#main-content)

- [Home](https://www.locknlube.com.au/)
- [Products](https://www.locknlube.com.au/collections/all-products)
- [Company](https://www.locknlube.com.au/pages/about-us)

Open main navigation

Close main navigation

- [Home](https://www.locknlube.com.au/)
- [Products](https://www.locknlube.com.au/collections/all-products)
- [Company](https://www.locknlube.com.au/pages/about-us)

 How can we help you?

- There are no suggestions because the search field is empty.

1. [Macnaught Group Help](https://kb.macnaughtgroup.com/?hsLang=en-au)
2. [Find Repair Kits](https://kb.macnaughtgroup.com/find-repair-kits?hsLang=en-au)
3. [Grease Equipment](https://kb.macnaughtgroup.com/find-repair-kits?hsLang=en-au#grease-equipment)

10 February 2026

# LockNLube Pistol-Grip Grease Guns – Heavy Duty & Premium Models (LNL153-450 & LNL252-450) - Service Kits

## High-quality one-hand operated pistol-grip grease guns designed for reliable, leak-free greasing. The Heavy Duty model (LNL153) features a rugged steel/cast head and outputs up to 5,000 PSI, while the Premium model (LNL252) has a lighter cast aluminum head and can deliver up to 8,000 PSI for the toughest fittings. Both guns include the LockNLube® Grease Coupler, a 20″ high-pressure hose with in-line swivel, an air bleeder valve, and a Loop & Lock™ handle clip for clean storage.

- **Grease Coupler Rebuild** 
    - Uses LockNLube Coupler Seal Kit (GC81011)
    - Includes new rubber seal and jaws
    - Quick rebuild restores like‑new performance
- **Hose & Swivel** 
    - Standard 1/8″ NPT fittings
    - Hose and swivel can be replaced independently
    - Use thread sealant when reinstalling
- **Follower & Spring** 
    - Replaceable if rubber plunger cracks or spring weakens
    - Model‑specific parts; contact LockNLube support
- **Pump Head Components** 
    - Internal failures are rare
    - Not sold as a kit; typically handled under warranty or support
- **Miscellaneous Parts** 
    - Bleeder valves, fittings, pins, and clips are replaceable
    - Loop & Lock clip can be replaced if damaged
- **Summary** 
    - Most wear occurs at coupler and hose
    - Guns are designed for long life with minimal intervention

- [Product Applications](https://kb.macnaughtgroup.com/product-applications?hsLang=en-au#main-content)

    - [Grease Equipment](https://kb.macnaughtgroup.com/product-applications?hsLang=en-au#grease-equipment)
    - [Air Equipment](https://kb.macnaughtgroup.com/product-applications?hsLang=en-au#air-equipment)
- [Product Troubleshooting & Maintenance](https://kb.macnaughtgroup.com/product-troubleshooting-maintenance?hsLang=en-au#main-content)

    - [Grease Equipment](https://kb.macnaughtgroup.com/product-troubleshooting-maintenance?hsLang=en-au#grease-equipment)
    - [Air Equipment](https://kb.macnaughtgroup.com/product-troubleshooting-maintenance?hsLang=en-au#air-equipment)
- [Find Repair Kits](https://kb.macnaughtgroup.com/find-repair-kits?hsLang=en-au#main-content)

    - [Grease Equipment](https://kb.macnaughtgroup.com/find-repair-kits?hsLang=en-au#grease-equipment)
    - [Air Equipment](https://kb.macnaughtgroup.com/find-repair-kits?hsLang=en-au#air-equipment)
- [Warranty Policy](https://kb.macnaughtgroup.com/warranty-policy?hsLang=en-au#main-content)

    - [Grease Equipment](https://kb.macnaughtgroup.com/warranty-policy?hsLang=en-au#grease-equipment)
    - [Air Equipment](https://kb.macnaughtgroup.com/warranty-policy?hsLang=en-au#air-equipment)