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

25/221556

Main relief valve (MRV) 25/221556 JCB JS330, aftermarket

In stock

0.00 ₺

25/929310

Main relief valve (MRV) 25/929310 JCB 3CX/4CX, aftermarket

In stock

0.00 ₺

LNC0204

Main relief valve (MRV) LNC0204 JCB, aftermarket

In stock

0.00 ₺

f77246de-4ed9-11f1-9b5f-00155d08054f

Mounting kit JCB 3CX/4CX, aftermarket

In stock

0.00 ₺

25/221792

MRV adjusting valve 25/221792 JCB 3CX/4CX, aftermarket

In stock

0.00 ₺

401/E6865

Normally open hammer valve 25/221087 JCB, genuine

In stock

0.00 ₺

33.3810010

Oil pressure gauge 33.3810010 MAZ/KAMAZ, aftermarket

In stock

0.00 ₺

02/202447

Oil pump relief valve 02/202447 Perkins 1004, aftermarket

In stock

0.00 ₺

928/60339

Pedal pilot valve 928/60339 JCB JS160W, genuine

In stock

0.00 ₺

333/K3325

Pilot control valve 333/K3325 JCB JS200/JS220, aftermarket

In stock

0.00 ₺

25/974643

Pilot unloader valve 25/974643 JCB 3CX/4CX, aftermarket

In stock

0.00 ₺

334/F6978

Pilot valve block 334/F6978 JCB 3CX/4CX, aftermarket

In stock

0.00 ₺

43206X3407200

Power steering pump 43206X3407200 Ural/YaMZ, aftermarket

In stock

0.00 ₺

400/U4030

Pressure relief valve 400/U4030 JCB, aftermarket

In stock

0.00 ₺

332/W0933

Priority valve 332/W0933 JCB, aftermarket

In stock

0.00 ₺

35/901701

Priority valve seal kit 35/901701 JCB, genuine

In stock

0.00 ₺

336/B9042

Priority valve spool 336/B9042 JCB, aftermarket

In stock

0.00 ₺

336/B9042

Priority valve spool 336/B9042 JCB, genuine

In stock

0.00 ₺

KDEDE5KR-20/40C13-203A

Proportional solenoid valve KDRDE5KR-20/40C13-203A JCB JS, aftermarket

In stock

0.00 ₺

65 FLE-PA

Pump coupling flange (polyamide) 65 FLE-PA CAT, aftermarket

In stock

0.00 ₺

coupling 110H

Pump coupling, segmented H type 110H, aftermarket

In stock

0.00 ₺

20/952142

Pump regulator valve 20/952142 JCB, aftermarket

In stock

0.00 ₺

929/06202

Quick coupling 1/2", male 929/06202 JCB, genuine

In stock

0.00 ₺

45/916200

Quick coupling 3/8", female 45/916200 JCB, genuine

In stock

0.00 ₺

Showing 553 to 576 of 630 (27 Pages)

Hydraulic system parts (page 24)