I can't find a distance specified of the surface of the timing device relative to the surface of the block in the FSM (may be there's a book worm out there who has seen it?). If I remember I'll try and measure the distance on my engine tomorrow. I could be barking up the wrong tree about this though...

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Thank you! Please don't go out of your way to find it, it's a moot point now.

More redundant stuff since you already have an Electric Vacuum Pump.

I ordered the below double Diaphragm Vacuum Pump from an eBay Seller. It is made in Germany.
Ford subcontracted a small Electric Delivery Truck from another Company that went Bankrupt. These VPs are surplus from that.
I don't know if there will ever be a repair Kit available for it unless I can identify the company who made the VP.
This VP was made from the onset to be a Brake Booster VP.

I figured the Diaphragm Pump is not going to over heat like the Hella vane type Vacuum Pump did. I was hoping it would come with a Vacuum Shutoff Switch Built in but there is none.
Don't know when I will get around to trying it. The eBay Seller
Ford Continental Electric Vacuum Pump 12VDC Ford A426C | eBay

Here is the article on the electric Truck:
Azure Dynamics Bankrupt, Built Ford Transit Connect Electric

The parts with the Red Line on them are actually Mounting Bolts you cannot see the other 2 but there is a total of 4 of them.

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84 300D, 82 Volvo 244Gl Diesel

One last monkey wrench:
With a manual transmission,
a choke cable shutoff,
and an oversized master cylinder to replace the booster

Why would you need vacuum?

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

Personally I like having the Power Brakes and the Auto trans. Also so My Wife can drive the Car.

Without some Trial and Error how would you find the correct sized Manual Master Cylinder unless there is a Manual Model out there to get one from as in the OP's Toyota.

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84 300D, 82 Volvo 244Gl Diesel

It's going to take some fabrication, but I imagine a large MC from a big truck would do the truck, or a "racing" MC with a 1"+ bore

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

By my understanding, simply increasing the bore of the MC would not increase braking power at the wheels, only make it so I have to push the brake pedal harder to achieve the same line pressure. A smaller bore would make achieving the same line pressure with less pedal effort possible, with a longer stroke to move enough volume. I would have to increase the size of the entire braking system to achieve the same stopping power without power assist.

I did a little searching in the past. I recall that 93-99 VW Jetta, Golf, & Cabrio have the electric vacuum pump for power brakes. I don't know if all models or just diesels. They also have a pump in the trunk for door locks. I bought one of the later real cheap on ebay for possible backup use on my 300D's. I was able to re-wire it to run as we need, but a lot of work, and I did something to fail that (forgot), so now it runs continuously. I now use it for AC work (pumps down to ~25" Hg after tweaking). The power brake one should have simpler controls and be more robust, but they do cost more. The $110 surplus Ford one looks interesting.

The W123 FSM has a bit of data for checking the brake booster - this might help to give an indication of the pressures that should be achieved at the calipers

Chapter 43-325

The vacuum pressure for these tests should be 0.75 to 0.8 bar

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__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Thank you Stretch, that's good data.

another easy way to skin the cat is a 4wd 98 up chevy pickup power steering pump/ vacuum pump combo they are everywhere.

Is it elec motor driven?

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

Electric vacuum pump arrived today, still waiting on the switch. I got nothing done on the beast today, was at the Great Oregon Steam Up from 7am until a few minutes ago. Time to get some steaks on the grill and get a glass of iced tea.

Are you talking about the hydroboost system?

Drove it to the fuel station. They're both closed, and the truck won't restart - battery dead. Good times!