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You'll read Uncle Arty B. making similar comment as to parts availability and quality today with the final 240, a wagon, left the assembly line at the (I guess) Torslanda plant in Göteborg Municipality, Västra Götaland County in August 1983.
What is wrong with your two front ABS calipers that they require replacement?
You may be able to inspect, treat for corrosion with the finest of emery cloth, brake parts cleaner, and on assembly, DOT-4 brake fluid as assembly lube? The ABS calipers are simpler than the non ABS calipers.
If the outer rubber flex brake line hoses are crocking, consider replacement. ATE is OEM.
You will want to research article here on your brickboard.com as some remanufactured calipers for 240 were rebuilt improperly. A recurring error is mismatched caliper halves. Unsure whether the issue continues to occur.
Why I mention getting a seal set for your two front ABS calipers and read articles here, again, on your brickboard, as to your own ABS brake caliper refurbishment in your garage at your home bench.
I'm unsure whether the Bentley 240 discusses caliper service with inspecting, cleaning, and installing new seals in the caliper piston bores while remaining about ascetically (or sterile is okay?) clean with fresh DOT-4 as your reassembly lube.
The seals wear after all the piston in-out action for decades.
Hastening brake systems failure is the neglect by not flushing in new DOT-4 every few years. I'm over due to do so on my 1991. I use the Walmart SuperTech. I guess the pricier Volvo or ATE fluid is better. US DOT-4 is US DOT-4.
Verify the Walmart has the DOT-4 on the shelf. The Walmart website is so inaccurate for comestibles and beverages on reported in-store availability. For the 1992 brake fluid flush, no DOT-4, so DOT-3 is flushed in, with plans to replace with a Dot-4 fluid flush-in this or next year. I use the Motive power pressure bleeder. Light taps on the brake pedal early in the process dislodge master cylinder embolism, or so I guess.
No need to bench bleed here, merely to fill up the MC bore. A messy and needless process. Like using gravity (better yet does nor forcibly flush out particles) or brake pedal action to press out fluid (stick some wood planks to limit brake pedal travel to 1/2 'cause if you go too far, you'll press the piston beyond the bore max limit travel, ruining what was a good MC, old or new).
Yet I'd hoped by now I owned a 2015 or 10-year old Toyota Camry or Corolla with manual transmission. Old car issue are wearying for a working hobby.
Also, on your 1993, consider rear hub works inspection. Very likely on all our 240s, the parking brake shoes are separating (de-laminating) from the steel backing plates. And well overdue to inspect, cleanse, and repack the rear wheel bearings.
I'm overdue on this also.
Ignorance may be bliss, as with never flushing in new brake fluid, yet the education in a catastrophe may be soon forgotten.
Thank you for the compliment. Glad to halps!
Blah, blah, blah here come the black tea theobromine for the wakefulness.
So, where is Uncle OldDuke? Motoring in the Saturn with A/C around east coastal Florida? His 1992 240 Wagon parked?
Happy Holidays, Boyeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee, and gots buttermilk, yet no sourdough bread.
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