Reinforced Radiator Expansion Tank Cap Heavy Duty Coolant Reservoir Cap for SHACMAN

Pressure Control for Loaded Trucks

A cooling system under load cycles pressure constantly. A standard cap lets coolant escape past a tired seal; this reinforced version holds the set pressure and returns coolant to the circuit instead of losing it to the road.

Built heavier than standard

• Reinforced body aimed at loaded and off-road work.
• Sealing ring and relief spring sized for constant pressure change.
• Direct fit to the original expansion tank neck, no adaptor.
• Black finish, individual bag and export carton packing.

When to replace

Coolant loss without a visible leak, a soft or sticky cap, or a reservoir that never holds level are the usual signals. Replacement takes a minute and avoids a roadside overheat on a loaded run.

Fitment and stock

Fits SHACMAN X3000 and F3000 cooling systems, certified to ISO 9001:2015. Tell us the truck model and quantity, and we confirm fitment and availability before shipment.