JCB expansion tanks and caps

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 22

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 28

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.

Expansion tanks and tank caps. There are tanks for JCB backhoe loaders, the JCB 456 loader, India-built (IND) machines, Perkins engines and MST machines, listed with numbers such as 128/15313, 128/15479, 332/E9125, 332/F0606, 334/G3689 and 334/J9865.

A tank is chosen by its JCB part number: the shape and hose connections depend on the machine series. The cap is a pressure cap that holds system pressure; a faulty cap can lead to coolant loss. Caps (123/06578, 477/00223) are sold separately.

Hoses from the tank to the radiator are in hoses, radiators in radiators. This section is part of the cooling system category.

By production type, this category holds: original — 3, aftermarket — 13. To get a price, use «Request price» on the product page and include the part number and chassis number (VIN).

Default Name Model

128/14093

Coolant expansion tank 128/14093 Perkins, aftermarket

In stock

0.00 ₺

128/15313

Coolant expansion tank 128/15313 JCB 3CX/4CX, aftermarket

In stock

0.00 ₺

128/15479

Coolant expansion tank 128/15479 JCB 3CX/4CX, aftermarket

In stock

0.00 ₺

128/15480

Coolant expansion tank 128/15480 JCB 3CX/4CX, aftermarket

In stock

0.00 ₺

332/E9125

Coolant expansion tank 332/E9125 JCB 3CX/4CX, aftermarket

In stock

0.00 ₺

5423412

Coolant expansion tank 5423412 MST, aftermarket

In stock

0.00 ₺

128/15696

Expansion tank (IND) 128/15696 JCB 3CX/4CX, aftermarket

In stock

0.00 ₺

123/06578

Expansion tank cap 123/06578 JCB 3CX/4CX, aftermarket

In stock

0.00 ₺

477/00223

Expansion tank cap 477/00223 JCB, aftermarket

In stock

0.00 ₺

126/02237

Expansion tank, long 126/02237 JCB 3CX/4CX, aftermarket

In stock

0.00 ₺

128/D1283

Coolant expansion tank 128/D1283 JCB, aftermarket

In stock

0.00 ₺

332/E9125

Coolant expansion tank 332/E9125 JCB 3CX/4CX, genuine

In stock

0.00 ₺

332/F0606

Coolant expansion tank 332/F0606 JCB 3CX/4CX, aftermarket

In stock

0.00 ₺

334/G3689

Coolant expansion tank 334/G3689 JCB, aftermarket

In stock

0.00 ₺

334/J9865

Coolant expansion tank 334/J9865 JCB JS, genuine

In stock

0.00 ₺

332/U7589

Expansion tank 456Z 332/U7589 JCB, genuine

In stock

0.00 ₺

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Expansion tanks and caps