Dear All,
I felt I should share my narrow escape from injury, whilst servicing the main linkage lift ram seals on a Case International 5150 Maxxum Plus 1994. When removing the large main O ring from the base of the cast housing, the heavy liner dropped out unexpectedly. I was using a trolley jack with wood block to catch the piston, and had left the jack in place, otherwise the heavy liner part could have dropped onto my legs. Even worse if I was over an inspection pit, and, if I was closer to the O ring assembly.
In short, the safe disassembly procedure is;
Remove 6 bolts holding the steel cap at the base of cylinder casting, making sure to have a jack or solid wood block, set up, closely, underneath.
Remove piston, which drops out if seals are old.
Old main O ring ( in the main housing) is usually in a bad way, distorted etc, so it has the effect of holding the cylinder sleeve in place!
Be very careful in removing this O ring, because as soon as you release it from its groove, the steel liner slides down at speed.(It is heavy and slippery with oil)
Have a large wood block underneath, and keep your legs (and any other living parts!) out of this drop zone.
I have found that the machining of the 6-bolt steel cap inner mating surface is not good, and some instant gasket will be required, on reassembly, next to the relief valve assembly side of the cap, where an extra clamping bolt would have been useful, but there is not room for one. Otherwise oil will seep past from the main oil chamber just by gravity. I think the generous layer of black paint served to seal this leak, from new, before I cleaned it all up for reassembly!
Anyway, there it is. These repairs will be coming up more often, I guess, so please be careful.
I felt I should share my narrow escape from injury, whilst servicing the main linkage lift ram seals on a Case International 5150 Maxxum Plus 1994. When removing the large main O ring from the base of the cast housing, the heavy liner dropped out unexpectedly. I was using a trolley jack with wood block to catch the piston, and had left the jack in place, otherwise the heavy liner part could have dropped onto my legs. Even worse if I was over an inspection pit, and, if I was closer to the O ring assembly.
In short, the safe disassembly procedure is;
Remove 6 bolts holding the steel cap at the base of cylinder casting, making sure to have a jack or solid wood block, set up, closely, underneath.
Remove piston, which drops out if seals are old.
Old main O ring ( in the main housing) is usually in a bad way, distorted etc, so it has the effect of holding the cylinder sleeve in place!
Be very careful in removing this O ring, because as soon as you release it from its groove, the steel liner slides down at speed.(It is heavy and slippery with oil)
Have a large wood block underneath, and keep your legs (and any other living parts!) out of this drop zone.
I have found that the machining of the 6-bolt steel cap inner mating surface is not good, and some instant gasket will be required, on reassembly, next to the relief valve assembly side of the cap, where an extra clamping bolt would have been useful, but there is not room for one. Otherwise oil will seep past from the main oil chamber just by gravity. I think the generous layer of black paint served to seal this leak, from new, before I cleaned it all up for reassembly!
Anyway, there it is. These repairs will be coming up more often, I guess, so please be careful.
