639 589 00 91 00 Test Cap - WS20.00-N-3035B

Engine 642 

FG 20/54/Set B 

Tester cap for expansion reservoir for performing leak test on engine cooling system in combination with pressure pump W 124 589 24 21 00.

For filling the engine cooling system using vacuum-type cooling system filler W 285 589 00 21 00.