Triple protection valve 100-3515210 KAMAZ, aftermarket

Triple protection valve 100-3515210 is an aftermarket part for the KAMAZ trucks.

The triple protection valve divides air from the compressor into three independent circuits, usually two brake circuits and an auxiliary circuit. If a hose bursts or a large leak occurs in one circuit, it isolates that circuit and keeps pressure in the healthy ones, so a single failure does not disable the whole brake system. A faulty valve slows reservoir filling, leaves pressure in one circuit lower than in the others or fails to isolate a leak. The valve's opening and closing pressures determine the order in which the circuits are filled.

Specifications

Compatibility

According to the product card, 100-3515210 is the triple protection valve in the air system of KAMAZ trucks. Other parts are in Hydraulic valves.

Fitting

Before the change, drain all the air reservoirs. Fit the valve so that the port connections follow the same order as on the old one, sealing the threaded joints with a suitable sealant. Once the system is up to pressure, check the pressure in each circuit with a gauge and the joints for leaks with soapy water. Protection valve failures are often caused by moisture and dirt in the system, so check the air dryer and reservoir drains along with the change. A leak test is made by measuring the pressure drop in each circuit over a set time after stopping the engine.