so I'm doing several things to the truck, among them is a faster way to air up/down my big 46" Mickeys. Holding an air chuck on the little valve stems takes a long time and usually cramps my hands, so I wanted a hands-free and faster way to get air in/out of my tires, and to that end I replaced my standard valve stems with large bore versions, and built a handy dandy hands-free tool using hi-flow air fittings, and it works awesome.

Chuck on the tool, open the valve, and deflate, close the valve and check pressure, repeat until at desired psi. Then to inflate, chuck on the tool, connect air hose, open valve, and watch the tires inflate. Fun fact - using my shop air compressor it took 1 minute to inflate these 46s from 0 to 30 psi, and my 13 cfm Bendix TF750 OBA system is not much slower, so boyahh. With the core removed I think the tires would deflate from 30 to 0 in about 30 seconds. Compared to the small stem stuff I've been running that's a huge improvement, and it cost me about $90 bucks (y)

This is my hands-free large bore tire inflator/deflator tool -



First, large bore valve stem vs standard stem -

I got the "large bore tank valves" (valve stems) from Borg Equipment, P.O. Box 190 Tujunga, CA 91043 Borg Equipment & Supply Co. Phone: 800-300-2674. These are for BIG equipment - loaders, graders, agricultural - things with BIG tires...

HAH47 / TR#J-671, Large Bore tank valve (valve stem), $5.37 each
HAA145 / TR-C2, LB valve core
note - I did open the base up to 1/4" with a drill bit for just a bit more flow -



LB core vs sb core - HUGE improvement in flow -



Hi-Flow air fittings (available at Harbor Freight, but I found the same kit via Amazon for a bit less and no travel time to the store) - https://www.amazon.com/dp/B08H23DB7H?psc=1&ref=ppx_yo2ov_dt_b_product_details



standard air tool fitting compared to the hi-flow fitting - HUGE improvement - perfect for my (or any) application -



Large bore air chuck - Amazon.com: Hromee Lock On Air Chuck for Large Bore Valve, Heavy Duty Closed Flow Tire Chuck, 1/4" FNPT for Tire Inflator and 12V1 Stem Quick Connector : Automotive



3-way T-fitting (AGS PTF73B) - https://www.oreillyauto.com/detail/...t-tee/ags0/ptf73b?q=ags+ptf73b&pos=0



ball valve - https://www.amazon.com/Valve-Compre...206&s=industrial&sr=1-3&th=1



I needed an air pressure gauge that would 1) handle my ~135 psi on-board air tank pressure, and 2) read accurately into the single digit range, and this Measureman 200 psi digital gauge does the job nicely - https://www.amazon.com/dp/B084ZTWXK9?ref=ppx_yo2ov_dt_b_product_details&th=1



here's the old standard (tiny) valve stems I was using -



and the wheel with the new LB stems - AFAIK these are the same 'monster valve' (large bore) stems in the off-road world now, but without the adjustable collar. I didn't really want the adjustable hardware because, well it happens so fast there's not much need for it.

[img]https://i.imgur.com/P2H0LtH.jpg[/img]