your trucks lose air? might wanna get that checked out!
Theory is that it shouldn't happen. Our Hino is fine.
But 3 foot-valves later we've come to the conclusion with our 1991
Suzi that fixing it will require all new cylinders & brake lines.
Seems that its previous brigade were none too fussy about draining
the cylinder condensate regularly.... It's hooked up to a compressor
now, so no response delay.