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Stiff Hydraulic Steering
This is posted as a Learn from Incidents
I have been having loads of trouble with the new steering over the last few weeks. & has been a bit of strange one to pin down and eaten a shite load of time & something like 20 lts of fluid.
Helm is a capalano 1275V Ram is a Latham run on -6 hose & fittings
It starts off fine but becomes stiff going RH down you can force it over but you can really feel the pressure build up & that helm is ticking away........
It sounds quite straight forward until you get into the trouble shooting.
Isolated all the various sections & all worked fine with no problems, even had the ram flow checked & the helm unit all perfect. I was just stripping the ram of tonight to ship it off again & was breaking into the base unit when I just happened to notice something as I pulled the -6 to 1/4 NPT elbows off the unit.
One seem slightly more polished than the other, put them side by side & to my poor old eyes even with glasses on looked different.
Quick check with a drill shank - fits in one not the other. Vernier out and bug*er me they are different internal diameters, same part numbers same everything just different manufacturing tolerances (being Kind there).
Run them both through enlarging the smaller to the larger size problem is solved, total difference was 1/8"
What made it feel worse was the fact it was on the smaller side of the unbalanced ram, if it was the other way round it may have not been such an issue
Don’t forget
Check the Bloody Obvious
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