20/902901
  • Brand
    JCB
  • Article
    20/902901
  • Machine system
    Hydraulic system
  • Part type
    Hydraulic part
  • Machine brand
    JCB
  • Manufacturing type
    Original
  • Compatibility
    JCB 3CX, 4CX
  • All the features
In stock
0.00 ₺
We do not publish prices: they depend on exchange rates and change often. Click «Request price» and we will quote the current price on the day you ask.
Check the exact specifications and compatibility with your machine with our managers.
We are available Monday to Saturday, 9:00 – 18:00; closed on Sunday.
Free delivery to the carrier of your choice, or collect your order in Istanbul.
Could not find the part you need? Write to us and we will help you find an alternative or order it from the manufacturer.

Hydraulic pump seal kit 20/902901 is a genuine JCB part for the JCB 3CX and 4CX backhoe loaders. The card also lists 333/Y4969.

A hydraulic pump seal kit contains the shaft seal, housing seals and the seals between the sections of a gear pump. According to sources, this kit suits Parker PGP series pumps and is used in the pumps of JCB 3CX, 4CX and other backhoe loaders. A pump leaking at the shaft seal or between sections can be rebuilt with this kit if the gears and housing are sound. During the rebuild, check the gears, side plates and bearings for wear, since a seal change alone is no lasting fix if these parts are worn. Dismantle the pump on a clean surface, mark the orientation of the parts and fit the seals oiled with clean oil.

Specifications


Part number20/902901
Cross / alternative numbers333/Y4969
ManufacturerJCB
Production typeOriginal
Part typeHydraulic part
System / groupHydraulic system
Machine makeJCB

Compatibility

Other parts are in Hydraulic repair kits.

Fitting

Before fitting, compare the part number and any setting mark on the body with the old valve. Leave the adjusting screw of preset valves alone; settings are checked only with a gauge against the service data. After fitting, check the hydraulic oil level, and if the valve failed because of dirty oil, change the hydraulic filter as well.

Specifications

  • Machine system
    Hydraulic system
  • Part type
    Hydraulic part
  • Machine brand
    JCB
  • Manufacturing type
    Original
  • Compatibility
    JCB 3CX, 4CX
Questions: 0
Your question:

No questions about this product.

Useful articles 07/10/2026 40
JCB 3CX / 4CX Hydraulic Pressure: Settings, Pressure Testing and Causes of Low Pressure
On JCB 3CX and 4CX backhoe loaders with a gear pump, the working pressure of the hydraulic system is limited by the main relief valve in the loader valve: 236–241 bar on machines up to serial number 964124 and 248–252 bar on machines from serial number 964125 (standard and high-pressure hydraulics). It is checked with a 0–400 bar pressure gauge connected to the loader valve test point, with the engine at 1500 rev/min and the oil warmed to 50 °C. Below are the settings, the test procedure and the reasons why pressure drops, taken from the JCB service manual (Section E).
JCB 3CX / 4CX 07/10/2026 18
JCB 3CX / 4CX Hydraulics: Circuit Diagrams, Pumps and Relief Valve Pressures
Section E of the JCB service manual (publication 9803/3290-14) deals with the hydraulic system of the JCB 3C, 3CX and 4CX backhoe loaders. It brings together technical data for the pumps and valve blocks, hydraulic circuits for machines of different build years, valve operation, fault finding tables, and the procedures for pressure testing and for overhauling the pump, valves and rams. The section PDF runs to 302 pages.
Useful articles 06/10/2026 36
Cylinder drift on a JCB 3CX/4CX: the cylinder, the spool or the ARV
If the boom or bucket creeps down under load, oil is escaping from the «locked» side of a cylinder. There are three causes: a worn piston seal, leakage past the control valve spool, or a leaking auxiliary relief valve (ARV). Here is how to find the culprit before buying parts and how much drift is normal. The data comes from the JCB service manual for 3C, 3CX and 4CX backhoe loaders.
Similar products
448/17205
Steering cylinder seal kit 448/17205 JCB, genuine
25/929303
Seal kit 25/929303 JCB, genuine
Seal kit 25/929303 JCB, genuine
In stock
0.00 ₺
35/901701
Priority valve seal kit 35/901701 JCB, genuine
Priority valve seal kit 35/901701 JCB, genuine
In stock
0.00 ₺

This site uses essential cookies (session, cart, language, currency). If you click «Accept», Google Analytics and Yandex Metrica cookies are also used for visit statistics; if you click «Decline», they are not loaded. Personal data is processed under the Turkish data protection law KVKK No. 6698. Details: Privacy and cookie policy.