you mean dash sizes 5,6 or 7?.a new o ring with me measure OD 5.85,CS 1.69 and ID 2.34 mm using a electronic vernier which frankly doesnt fit the dash sizes mentioned?
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Hill Mark3 Pump Rebuild Question
- Thread starter FiveString
- Start date
Those dimensions are a close match to a -005.
Basing that on the cross-section being very close to 0.070", which excludes the metric families of 1.5mm and 2mm since they are each about ten thousandths smaller or larger, respectively. So with it established as being in the "dash" family of standard O-rings (-00x), the closest match is a -005.
Basing that on the cross-section being very close to 0.070", which excludes the metric families of 1.5mm and 2mm since they are each about ten thousandths smaller or larger, respectively. So with it established as being in the "dash" family of standard O-rings (-00x), the closest match is a -005.
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i think you are right...this is the approx size courtsey the OLYPSYS android free app...0005 size is the nearest best measure.are these NBR 90?
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Just referring to the compression of the rings between the ID and OD, not air compression. Slightly larger (1.78 vs 1.69 as measured above your post) would be preferred rather than slightly smaller. Obviously, the measurements need to be fairly close all around to do the job properly and allow the O-ring to last.
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Will using dry pac content from another manufacturer (dessicants) have any adverse impact for my hills mk 3 pump...i mean there are cheaper dry pac granules available including colour changing media...as such ivee been forced to rehaul this pump after o nly 3 pumping sessions lately because of massive rains in my area(monsoons) inspite of the hills dry pac .Im enclosing a photo of one such colour changing bead dessicant....whats the advice
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is there a particular alignment to be followed for the location arm of the dry pac in a hills mk 3 pump..because it has a hole in it..?
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No particular alignment needed and you can use different dessicant. It is supposed to dry the air going in to the pump but the amount of rust and corrosion I found in my pump after a few uses prooves that the "in air" dessicant does very little to dry the air. The "out air" filter and drier I have on my china pump produces drier air for the gun and doesn't rust even though I have moisture building up in the pump.
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see this attached diagram..Hills recommends adding the coloured dessicant on top of the dry pac..is this ok or should it be at the bottom?any advice
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In my experience the desiccant for the Hill pump is all for "show." It does virtually nothing.
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