The Original Grease Buster® (Clogged Grease Fitting Cleaner) – GB17-ANZ / GB19-ANZ - Troubleshooting
A patented tool for clearing clogged grease fittings (zerks) and restoring blocked grease pathways. The Grease Buster® consists of a machined steel cylinder and piston: fill the cylinder with penetrating oil, attach it to a stubborn Zerk fitting, and tap the piston with a hammer to force solvent into the blockage under high pressure. This dissolves hardened grease and frees up the lubrication passage, saving time and avoiding disassembly of equipment.
- Proper Use
- Fill cylinder with penetrating oil (not grease or thick oil)
- Leave a small air gap when filling to allow pressure build‑up
- Securely attach the coupler to the grease fitting
- Strike piston with moderate, repeated hammer taps rather than heavy blows
- Clearing Stubborn Blockages
- Apply pulsing pressure with repeated taps
- Allow solvent to soak for several minutes if needed
- Repeat process if grease still does not flow
- Coupler Issues
- If the tool pops off, ensure the coupler is fully locked
- Adjustable coupler can be tightened for worn Zerks
- Piston Not Moving
- Check for overfilling (no air gap)
- Drain a small amount of fluid and retry
- After Use
- Attempt greasing again with a standard grease gun
- Replace the grease fitting if the internal ball is faulty
- Tool Maintenance
- Clean tool after each use
- Drain remaining fluid and wipe exterior
- Lightly oil piston rod before storage
- Keep coupler clean and lubricated
- Seal Care
- Piston uses two O‑rings; keep lightly oiled
- Replace O‑rings if fluid leaks around the piston
- Inspection & Safety
- Check piston head for mushrooming; file flat if needed
- Wear safety glasses and gloves during use
- Store in a dry place; use coupler cap if supplied
- Summary
- Simple, rugged tool with minimal maintenance needs
- Proper technique and seal care ensure long service life