300TD (123.193) L5-3.0L DSL Turbo (617.952) (1984)
A Uncleaned oil toward air-oil cooler
B Uncleaned oil from air-oil cooler
a
From oil pump
b
To bearing points
c
Finely filtered oil toward oil pan
e
To exhaust gas turbocharger
f
To oil pressure gage (models 116 and 123)
g
Oil quantity directly to combination filter element
8
Bypass valve
a
From oil pump
b
To bearing points
If the oil filter element is badly contaminated and the differential pressure between the contaminated side and the clean side of the filter exceeds 3.5 bar,
bypass valve (8) will open. The oil will then flow uncleaned toward engine and exhaust gas turbocharger.