Cap Lock Ring
The Freightliner 06-25618-000 CAP LOCK RING is designed to hold the surge tank breather cap firmly in place on the coolant reservoir. Used with the updated breather assembly, this stainless vent-retainer ring keeps the cap from shifting, which can otherwise cause seepage around the tank opening. Its precise inner and outer diameters match the OE surge tank design, giving technicians a reliable way to restore proper cap retention during cooling system repairs or campaigns.
$1.86
Specifications
Freightliner part 06-25618-000 functions as a vent-retainer or cap lock ring for coolant surge tank breather caps on select Freightliner platforms. Service bulletins for Century Class and other models specify this ring as part of an updated breather cap kit to address issues with leaking and cap movement, especially where hood clearance and vibration are factors. Installed inside the breather cap, the stainless ring (about 27 mm ID, 37.8 mm OD, 0.61 mm thick) provides a positive, long-lasting mechanical lock between cap and breather assembly, helping maintain correct coolant level and pressure control.
Weight
0
Compatibility
Freightliner Century Class – models built before Aug 8, 1996
Freightliner FLD Conventional – similar era (cooling system with same breather assembly)
Freightliner Business Class / FLC112 – where the same surge tank breather kit is used
Freightliner FLD Conventional – similar era (cooling system with same breather assembly)
Freightliner Business Class / FLC112 – where the same surge tank breather kit is used
Alternative Part Numbers
0625618000
625618000
625618000