///HP seals wear out much faster than before
Intensifier: high-pressure side
HP seals wear out much faster than before
Seal life depends on water quality, clean assembly and the state of plunger and cylinder.
Safety first: Switch off the pump, release all pressure (open the on/off valve or bleed-down valve) and lock out before you open any high-pressure part. Never put a hand or tool near a running jet.
1Quick questionsYour answers put the most likely cause on top.
Has your water source or filter changed?
2Check the causes, most likely first
0 of 4 checked
01Poor inlet water
Most likely
Particles, silica and high TDS act like sandpaper on seals.
How to check: Test water: TDS ideally below ~100 ppm, silica low, pH about 6.5-8.5.
| Photo | Art. no. | Description | Excl. VAT | |
|---|---|---|---|---|
| 10633 | Filter element 0,5 Micron 10"
FilterKMT, BFT, Flow |
€ 13.08 | ||
 | 10634 | Filter element 10 Micron 20", 49834716
FilterKMT, Flow |
€ 19.08 | |
 | 10635 | Filter element 10 Micron 10", 10106722
FilterKMT, Flow, CMS / Tecnocut |
€ 6.60 | |
| 10661 | Filter element 5 Micron 10"
FilterKMT, BFT, Flow, STM |
€ 10.20 | ||
 | 10714 | Water Filter Housing. SS, 250 psi, 3/4" FNPT, 72118339
FilterKMT |
€ 286.80 |
02Scratched plunger or cylinder
Possible
A damaged surface cuts new seals.
How to check: Inspect plunger and bore at every seal change.
03Dirt or wrong lubricant at assembly
Possible
One grain of dirt can cause an early leak.
How to check: Clean all parts; use the specified clean lubricant.
04Worn plunger bearing or bronze backup
Less likely
A worn guide lets the plunger run off-centre.
How to check: Check backup ring and bearing for wear.
Related problems
General advice based on manufacturer manuals and service practice. Always follow the manual of your machine. Not sure? .