Loren Faeth wrote:
Engine oil lubricating the IP is not true for OM 621 and at least some 615
engines. Does anyone know where the cutoff was between the fuel lubricated
pumps and crankcase oil lubricated pumps? I think it was mid 70s somewhere.
My 66 engines are fuel lubricated. My 81 240D is engine lubed.
All Bosch injection pumps in Mercedes diesels are lubricated with engine
oil - NOT fuel. The early ones (OM615/616 thru 1976) were NOT connected
to the engine lubrication system, the later ones were connected, but
engine oil was the lubricant in all of them.
One of the maintenance points (job 800 '72-'80 Maintenance Manual) on
the early ones was to unscrew the check plug and fill the pump with
engine oil so it would displace any fuel/fuel-oil mix that had migrated
into the oil reservoir.
Marshall
--
Marshall Booth (who doesn't respond to unsigned questions)
"der Dieseling Doktor" [EMAIL PROTECTED]
'87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84
190D 2.2 229Kmi (retired)
