Sealey Grease Gun - AK4402
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eBaySealey AK4402 Heavy-Duty 3-Way Fill Dual Piston Grease Gun
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Sealey AK4402 Heavy-Duty 3-Way Fill Dual Piston Grease GunFree delivery in 1–3 days£36.41Visit shop →
Heavy-Duty 3-Way Fill Dual Piston Grease Gun£5.99 delivery£48.57Visit shop →
Sealey Grease Gun With Variable Stroke Heavy Duty Twin Piston 3-Way Fill AK4402Free delivery in 1–3 days£52.94Visit shop →
Robert DyasSealey Heavy-duty Grease Gun - Twin Piston - 3-Way Fill - 400g
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Product Information
Full details
The Sealey AK4402 is a robust, heavy-duty grease gun engineered for professional mechanics and agricultural machinery maintenance. Its dual piston mechanism provides a reliable, high-volume grease output, making it ideal for frequent lubrication tasks where efficiency is paramount. While its 3-way loading versatility offers great convenience, users should note that the included 150mm steel extension is fixed, which may require additional flexible hoses for accessing recessed or obstructed grease nipples in tight engine bays.
All features
| Model Part Number | AK4402 |
|---|---|
| Brand | Sealey |
Extended Product Information
FAQs
Can I use this with a flexible hose?
Yes, while it comes with a 150mm steel extension, the thread is compatible with standard grease gun flexible hoses.
Is this grease gun compatible with all 400g cartridges?
Yes, it is designed to fit standard 400g grease cartridges widely available in the industry.
How do I clear an airlock?
Simply press and hold the air release valve while cycling the handle until a steady stream of grease flows from the coupler.
What is the benefit of the dual piston?
The dual piston mechanism ensures higher pressure and volume delivery per stroke compared to a single-piston pump.
How should I clean the coupler?
Wipe with a clean, lint-free cloth and ensure the internal ball-check valve is free of grit or hardened grease.
Troubleshooting
Grease is not being dispensed despite full strokes
The unit likely has an airlock; use the integrated air release valve to bleed trapped air while operating the handle.
Handle is stiff or difficult to operate
Check if the plunger rod is jammed or if the grease viscosity is too high for the current temperature; ensure the tube is not overfilled.
Leakage around the head or coupler
Tighten the head assembly securely and inspect the coupler seal for debris or wear; replace the coupler if the internal jaws are damaged.
Pros and Cons
Pros
- Highly durable aluminium construction
- Versatile 3-way loading options
- Efficient dual piston output
- Integrated air release valve prevents airlocks
- Variable stroke control for precision
Cons
- Includes rigid steel tube rather than flexible hose
- Heavier than entry-level plastic models
- Requires proper priming for bulk loading
Setup, Compatibility & Care
To begin using the AK4402, ensure the plunger rod is fully retracted and locked. If using a 400g cartridge, remove the end cap and insert the cartridge before venting air via the release valve. For bulk loading, remove the head and use the plunger to draw grease directly into the tube. Always wipe the coupler clean before and after every use to prevent debris from entering the grease fitting. Store the gun in a clean, dry environment, and periodically check the threads on the head to ensure they remain tight. If the device remains unused for extended periods, wipe down the exterior with a light oil to prevent corrosion on the aluminium body.