CAT PUMPS 33394 INTEGRAL REGULATOR/UNLOADER PRESSURE SPRING 2DX,
CAT PUMPS 33394 INTEGRAL REGULATOR/UNLOADER PRESSURE SPRING For Models : 4DX29GUIF , 4SP21ELR, 4SP21ELU 4SP29ELR, 4SP29ELU 2DX20E, 2DX20EN, 2DX30GS, 2DX30GNS, 3DX29GSI, 3DX30GSI 3DX25GSI, 3DX27GSI, And Others. If you are not sure if this is the correct spring for your built in unloader, just message us.