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QUESTION:I have a new machine that has some grease fittings that have metric
threads and heads that are about .012 of an inch smaller than the SAE
fittings. When I try to grease them the grease escapes between the
coupler and the head of the grease fitting. I assumed they were metric
fittings and required a special coupler. The manufacturer claims that
there is no such thing as a metric grease fitting and that those
fittings with metric threads have heads that are manufactured to SAE
standards. Do I have grease fittings with substandard sized heads or is
there a different standard for metric fittings?
ANSWER: I will interested in the answers you receive also. I have a new (153 hours
when I got it) John Deere - it is really a Yanmar, made in Japan, and 100%
metric. About 75% of the grease fittings are hard to get grease into - it
oozes out around the fitting. Same with my Japanese built IHI
mini-excavator which has a "lot" of grease fittings.
I was thinking it was the grease gun but it doesn't do that on the grease
fittings on the older 1976 Ford tractor.
Some of the grease fittings don't look the same as the older zerk fittings,
they seem to be more spherical in shape, some with a bit of a horizontal
step around them.
I've been thinking of replacing them or finding a matching grease gun.
Fitch"likes grease in the bearings"Williams
In So. Cal.
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