20 Comments

  1. Whole new meaning of having “air brakes”, lol, still can’t complain on that part failing after 31 years, more annoying to me tho is the ignorance of owner/drivers using vehicle with warning light on, so many people ignore warning lights and gauges to their own detriment.

  2. Hi Petr,

    If you ever have customers that aren't in the most urgent need of parts I would recommend checking Amayama for prices. They are genuine parts, supplied directly from the manufacturers. Shipping times can be a bit slow though.

  3. Thanks for the great video. I didn't know about the valve for the rear brakes so if I have a problem with my 93 or 95 pickup I'll be a lot more prepared! Seems like the owner(s) knew about this before or the person who sold them the truck new there was an issue because why was the load sensing bar/spring unbolted? There is no reason for it to be off because it is too high in the wheel well to be hit etc… They probably took it off because they knew it was leaking and by taking off the spring it made it leak less fluid. Since the owners are most likely thrifty like most northern california commune/sharing people they could have just tried filling up the brake reservoir and seen how it brakes and how long it takes to deplete to the fill level, but better would be just replace the part for 5 to 6 hundred and be done with it and be safe. Hopefully now a wheel cylinder wont start leaking because the they might have dried out seals now since barely any fluid was going to them and with the added pressure they might not be able to cope with it. If I were toyota maintenance man I would recommend changing those too, but I'm pretty sure the owners would decline so it probably isn't even worth it to ask. Just make more money off of them if they do in the future.

  4. Hi Peter! i know so, old Mercedes ('70-'80) rear prop-valves are rebuildable, but it is not easy DIY job, need a old fashion specialist, and time – so it's not hopeless thing, if there are no new parts avaible

  5. Back in 1990, I purchased a Certified pre-owned 1986 F150 from my local Ford dealer. Low miles, pristine condition, and they absolutely assured me it had passed their famous '28 point mechanical inspection' and that everything was in great shape, ROAD READY !!!! Took delivery of the truck, within a week the brake pedal began to feel a little soft like a sponge. Popped the hood, and WA-LA, the master cylinder reservoir was BONE DRY. I refilled it at home, and immediately had a solid, normal brake pedal feel. Took the truck back to the dealer for repairs. They could find NO source of a fluid leak. Drove the truck for years and never had any problems. Total mystery!

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