Hydraulic system parts: pumps, cylinders, valves

Categories

07/10/2026 27

JCB JS200–JS260 Monitor Messages: What They Mean and What to Check

On JCB JS200, JS210, JS220, JS240 and JS260 tracked excavators with the AMS control system, the monitor in the cab shows the working mode, the time, gauges for oil temperature, coolant temperature and fuel level, and warnings in the message line. Each message first of all points to a real problem: low fuel or coolant, a blocked filter, overheating. But if a message stays on after the cause has been put right, the sensor, wiring or controller is at fault. Below is what each message means and what to check, based on Section C of JCB service manual 9803/6400.

07/10/2026 34

JCB JS200–JS260 Track Tension: How to Check the Sag and Adjust the Tracks

Track tension on the JCB JS200, JS210, JS220, JS240 and JS260 tracked excavators should be checked every shift. With the track raised off the ground, the gap between the underside of the track frame and the top of the track shoe at the fourth bottom roller from the front should be 275–295 mm on hard ground and 320–340 mm on soft sand and sticky clay. Tension is adjusted with grease through the valve on the track adjuster cylinder. The procedure below follows Section 3 of JCB service manual 9803/6400.

07/10/2026 23

JCB 3CX and 4CX Dipper Ram Creep: Causes, Ram Creep Tests and Repair

If the dipper of a JCB 3CX or 4CX backhoe loader drops on its own under load, there are three possible causes: a leaking piston seal in the ram, spool leakage in the excavator valve section, or a leaking auxiliary relief valve (ARV) in that section. The JCB service manual gives a test procedure that identifies the culprit before the ram is removed and stripped. Below are the test sequence, the permitted creep and the repair rules from Section E of service manual 9803/3290.

07/10/2026 29

JCB 3CX and 4CX Hydraulic Oil: HP32 or HP46, System Capacity and Changing the Oil

For the hydraulic system of JCB 3CX and 4CX backhoe loaders, the JCB service manual recommends ISO VG32 oil — JCB Hydraulic Fluid HP32 — at air temperatures below +38 °C. The more viscous ISO VG46, JCB High Performance Hydraulic Oil, is for air temperatures above +38 °C only. Machines with Advanced EasyControl joysticks need a separate all-season HV class oil, JCB Multigrade Anti Shear. The hydraulic system holds approximately 130 litres. The oil is changed every 2000 hours and the filter at every 500-hour service.

07/10/2026 33

JCB 3CX and 4CX Antifreeze: Which Coolant to Use, How Much and How to Change It

On JCB 3CX and 4CX backhoe loaders with the JCB Dieselmax engine, the coolant is renewed every two years, at the 2000-hour service. The cooling system holds 18.5 litres. The JCB service manual calls for an ethylene glycol antifreeze to ASTM D6210 with corrosion inhibitors and rules out organic acid technology (OAT) products. The standard mix is 50%, which gives protection down to −40 °C. Below we cover choosing, checking and changing the antifreeze as described in Section 3 of JCB service manual 9803/3290.

Default Name Model

45/910700

Quick coupling 3/8", male 45/910700 JCB, genuine

In stock

0.00 ₺

401/L0100

Quickhitch cylinder 401/L0100 JCB, aftermarket

In stock

0.00 ₺

335/07704

Rear control valve pipe 335/07704 JCB 3CX/4CX, genuine

In stock

0.00 ₺

336/B2035

Relief valve 138 bar 336/B2035 JCB 3CX/4CX, aftermarket

In stock

0.00 ₺

25/222416

Relief valve 333/C8658 JCB 3CX/4CX 310 bar, aftermarket, option 2

In stock

0.00 ₺

JLJ0286

Relief valve JLJ0286 JCB, aftermarket

In stock

0.00 ₺

332/F6686

Repair kit 332/F6686 JCB, aftermarket

In stock

0.00 ₺

3623373M91

Repair kit 3623373M91, aftermarket

In stock

0.00 ₺

25/221236

Right-hand hydraulic valve 25/221236 JCB, aftermarket

In stock

0.00 ₺

45/920115

Rotary coupling (centre joint) 45/920115 JCB JS130, aftermarket

In stock

0.00 ₺

332/C3819

Rotary coupling seal kit 332/C3819 JCB JS145W, aftermarket

In stock

0.00 ₺

332/C3819

Rotary coupling seal kit 332/C3819 JCB JS145W, genuine

In stock

0.00 ₺

25/929303

Seal kit 25/929303 JCB, genuine

In stock

0.00 ₺

20/952543

Servo (pilot) pump 20/952543 JCB JS, aftermarket

In stock

0.00 ₺

332/C1080

Servo (pilot) pump 332/C1080 JCB JS, aftermarket

In stock

0.00 ₺

332/G9537

Shut-off valve 332/G9537 JCB, aftermarket

In stock

0.00 ₺

401/E6616

Shut-off valve 70 401/E6616 JCB, aftermarket

In stock

0.00 ₺

590/40228

Slew cylinder rod 590/40228 JCB 3CX/4CX, aftermarket, option 1

In stock

0.00 ₺

R901091102

Solenoid cartridge valve R901091102 Rexroth, aftermarket

In stock

0.00 ₺

332/D6317

Solenoid coil 332/D6317 JCB, aftermarket

In stock

0.00 ₺

4306924

Solenoid coil 4306924 JCB JS, aftermarket

In stock

0.00 ₺

25/222658

Solenoid coil, slow mode 25/222658 JCB 3CX/4CX, genuine

In stock

0.00 ₺

25/223170

Solenoid valve 12 V 25/223170 JCB 3CX/4CX, aftermarket

In stock

0.00 ₺

25/221152

Solenoid valve 25/221152 JCB 3CX/4CX, aftermarket

In stock

0.00 ₺

Showing 577 to 600 of 630 (27 Pages)

Hydraulic system parts (page 25)