MNT-2026-04 Date: April 14, 2026 Subject: Ineffective plunger operation – failure to build pressure, displace fluid, or actuate mechanism.
| Root Cause | Corrective Action | Estimated Time | |------------|------------------|----------------| | Worn seal | Replace with OEM-spec seal; lubricate upon installation | 15 min | | Scored cylinder bore | Hone bore (if <0.05 mm deep) or replace cylinder | 30–60 min | | Debris in bore | Flush with compatible solvent; use filter on inlet | 10 min | | Air lock | Prime system: cycle plunger slowly with outlet open | 5 min | | Bent plunger rod | Straighten or replace; verify alignment of guides | 20 min | | Check valve stuck | Disassemble, clean, test ball/seat sealing | 15 min | plunger not working
Made of hard plastic, these provide massive pressure but are prone to scratching porcelain. 2. Your Technique Needs Tuning Your Technique Needs Tuning So, what can you
So, what can you do if your plunger just won't work? Here are some troubleshooting tips: Your Technique Needs Tuning So