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Old 02-09-2010, 08:01 PM
layback40's Avatar
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Join Date: Nov 2009
Location: Victoria Australia - down under!!
Posts: 4,023
The concerns expressed about molly grease & bearing applications surprise me some what.

My old 300D (now a parts car) had its front wheel bearings repacked with molly grease at 200,000 miles, they were never re greased again. The car was retired at 800,000 miles. So 600,000 miles trouble free on molly grease.

During 1993 the car was driven in floods for about a month (all fluids were replaced after this), a year later one of the rear wheel bearing developed a typical wheel bearing noise (350,000 miles). As a quick fix, a hole was drilled into the bearing cavity, fitted with a nipple and molly grease injected. The noise soon went away and the bearings did not require any further service.

We have over 20 different vehicles here requiring a range of lubricants. They include cars/pickups (diesels & gassers), trucks, tractors, stationary engines, dozers, scrapers, road graders & non powered equipment. Over the years we have had both Mobil & Shell do lubricant surveys for us. One of the reasons is to allow us to standardize as much as possible the lubricants we use. They both recommended the use of one grease for all (including wheel bearings). They were molly based products.
I have previously quizzed their lubrication engineers about the type of concerns that have been expressed here. They advised me that much of the concerns had no basis and were just marketing hype. " There are many one liners about products in marketing information that is questionable". They sighted reports concerning lubricant use by experts in the field and I have previously mentioned this in a thread.

For the average guy just wanting to repack his hubs, it may be easiest & best to go with the MB grease.

When your application is such that the cost of down time per day is more than most cars discussed on this site are worth, some the equipment is valued at more than most peoples homes and you own the equipment (not just working for some person or government), you tend to seek out the best up to date information you can.
In terms of my own interpretation of information, I am a Professional Engineer, holding an Engineering Degree from The University of Adelaide. I have several decades of experience as a Professional Engineer.

Those who would choose to comment on the truthfulness or accuracy of information presented on here or express personal opinions, should at least provide details of their training and experience. I invite them to do so as I have in the past.
I am not attempting to belittle or insult any one, just simply insure we all get the best, most technically accurate information we can.
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Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving
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