Valve cotter suitable for JCB DieselMax / EcoMax - Engine
Part Number: 320/03528
Type: Valve Cotter / Taper Lock
Engines: JCB DieselMax / EcoMax (444, 448)
Manufacturer: Aftermarket
Function and failure diagnostics
The 320/03528 valve cotter is a small, two-piece tapered component that holds the valve spring under tension, allowing the valve to close properly after opening.
Critical failure:
Causes of failure:
Signs of wear:
⚠️ Safety warning
Incorrect installation or a damaged valve cotter can release the spring, causing the valve to drop into the cylinder and completely destroy the engine (piston, head, cylinder). Always ensure cotters are properly seated during assembly.
Application in JCB machinery
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Machine Type
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Models (DieselMax Engine)
|
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Backhoe Loaders |
3CX, 3DX, 4CX, 5CX |
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Telehandlers |
531-70, 535-95, 541-70, 500 Series |
|
Excavators |
JS130, JS145, JS160, JS220, JZ140, X Series |
|
Other Equipment |
Teletruk, Vibromax Rollers, Generators |
Application applies to JCB DieselMax and EcoMax engines. Typically 2 pieces per valve.
Data sheet
Specific References
Manufacturer
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The 320/03528 valve cotter is a small, two-piece tapered component that holds the valve spring under tension, allowing the valve to close properly after opening.

















