///Hydraulic pump is noisy (whining or rattling)
Intensifier: hydraulics & oil

Hydraulic pump is noisy (whining or rattling)

Noise from the hydraulic pump often means air in the oil or a starving inlet.

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
01Low oil level or air in the oil Most likely

The pump sucks air.

How to check: Check level and suction line.

PhotoArt. no.DescriptionReplaces OEMExcl. VAT
10108 Hydraulic Cartridge Seal Assembly, 05130091
AssemblyKMT
KMT 05009030 · KMT 05130091 € 99.12
10152 O-ring 3-3/4" x 4.0" x 1/8", 10075000
O-ringKMT
KMT 10075000 € 2.00
10153 O-ring 1.0" x 1.25" x .13", 10074409
O-ringKMT
KMT 10074409 € 0.96
10155 Back-Up Ring Piston SLIV, 05049994
Back-up ringKMT
KMT 05049994 € 2.28
10156 Ring, Glide Hyd Piston, 05117940
Bushing & ringKMT
KMT 05117940 · KMT 49886310 € 11.88

02Worn pump or coupling Possible

Mechanical wear.

How to check: Inspect pump and coupling.

Related problems

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