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Sunday, January 31, 2010

Hydroboost remote accumulator adapter

The silver adapter replaces the accumulator and has a JIC fitting on it for a remote accumulator. It fits in place of the original like the gold one on the left.
Used a small block chevy valve spring to hold the adapter against the lock ring. The original was held in place by the gas pressure. An O-ring seals it.

Made dimensions the same as original.

Monday, January 25, 2010

Hydroboost accumulators and a BBQ tour

The bigger silver accumulator is what I'm going to adapt to the hydroboost. It is 3 to 5 times larger in capacity than the stock size units on the left. Removed from a DC-10-40 when it was decommissioned.
We went on a BBQ tour, Missouri, Tennessee, Arkansas, Oklahoma. The ribs we got in Missouri were the best.
Missouri mines state historic site. Missouri has a lead belt and this mine was turned into a museum with a huge collection of minerals from all over the world. There are hundreds of miles of tunnels now flooded. The Doe Run mine is in operation today in the area. Located by Park Hills on highway 32.
Beale street Memphis Tennessee
Martin King museum. The cars are like the original ones that were parked there.

Friday, January 15, 2010

AN6 adapter fittings

These fittings adapt the metric oring ports on this booster to AN6 which is the same as common JIC hydraulic sizes.

Another view of the "two function" valve

Wednesday, January 6, 2010

Hydroboost, snow and a wallowed out hole

Bendix uses a figure eight seal ring. It is not round and is almost square in cross section.
Body halves ready to go together. I found that the power pistons are different in depth where the master cylinder push rod seats. I made two out of 3/8 bolts to get one I liked.
Forecast 6 more inches of snow today. My back blade angle locking pin hole is wallowed out.
Welded on a ring to take some of the slop out.

Monday, January 4, 2010

Hydroboost seals and valves

Some boosters have relief valves. The top left one doesn't and is the 94 Astro unit. They look kind of like sight glasses from the out side. There is some clear hard stuff and a blue plastic ball stuck in the hex socket that adjusts it. Not supposed to be user adjustable haha. I think I read that they are set for 1,600 psi. In my case it was 9 turns in from the first thread when removed so that's where it will be reset.

Here is the valve and spring out of the hole. An O-ring seals it
This is the "two function valve" the yellow end lets pressure in the accumulator if the line pressure is higher than what's in the accumulator. The pin lets fluid out of the accumulator if hydraulic line pressure is lost and the pedal gets mashed far enough to push it in. That is the emergency back up.
The hat looking piece is what pushes the pin in.
Spool body plug held in with a spring clip and seals with an O-ring.
Power piston seal.