///Direct-drive pump vibrates more than normal
Direct-drive plunger pumps

Direct-drive pump vibrates more than normal

Extra vibration often means one cylinder does not work.

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.
1Check the causes, most likely first 0 of 2 checked
01One cylinder not pumping Most likely

Unbalanced pumping shakes the pump.

How to check: Check cylinder temperatures.

PhotoArt. no.DescriptionReplaces OEMExcl. VAT
10084 Spring LP-Inlet SLIV/SLIV+, 49884562
SpringKMT
KMT 49884562 € 4.32
10085 Spring Check valve, 05147863
SpringKMT, H2O
KMT 05147863 · KMT 49894116 € 1.90
10088 Flat Outlet Poppet, 05116561
PoppetKMT, H2O
KMT 05116561 · KMT 05112776 € 31.80
10089 Retainer, Poppet, LP-IN SLIV, 10118552
PoppetKMT
KMT 10118552 · KMT 05144670 € 42.29
10090 Spring Guide, Poppet, 05116751
PoppetKMT, H2O
KMT 05116751 · H2O 102008-1 € 37.80

02Loose mounting Less likely

Mounts loosen.

How to check: Check bolts.

Related problems

General advice based on manufacturer manuals and service practice. Always follow the manual of your machine. Not sure? .