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MG TD TF 1500 - Vacuum Bleeding Brakes (sort of OT)

The other night Ant was seen bleeding brakes with a compressor operated Venturi operated vacuum source. My son asked why we don't have one. Looking into it $150 is a lot of money for a hole drilled into a piece of tubing.
A hand operated vacuum source (MityVac is $55 or so.)
Looking around for a cheep source of vacuum I found:

https://www.ebay.com/itm/3-5-CFM-Rotary-Vane-Vacuum-Pump-1-4HP-HVAC-R134a-Air-Refrigerant-Conditioning/131845616776?epid=11021421163&hash=item1eb29c7488:g:kUIAAOSwMZJa9P4t:rk:2:pf:0

which for $50 gives an excellent source of vacuum. My son thinks it would be too strong but wit the addition of a toggle valve I think it would be fine.
I also think you could use it as a small compressor?

Comments!

Jim B.
JA Benjamin

I have built myself a pressure bleeder consisting of an old pump-up garden sprayer with the outlet hose connected to a spare master cylinder cap and a inexpensive pressure gauge inserted through the wall of the sprayer canister. Fill with brake fluid, attach the cap to the master cylinder, pump up to about 10 PSI, then walk around to each wheel cylinder and crack the bleed nipple until no bubbles appear. 10 minutes with no second person and you're done.
Lew Palmer

Too strong to handle, no. In such circumstances you can only have a negative pressure of 1bar or 0.1MPa (theoretical max), and no pump quite gets there (the specn for that one shows 5Pa absolute, which is pretty close). However, much simpler technology should work, like a bicycle pump with the piston seal reversed.
Dave H
Dave Hill

There's an easy way to bleed brakes with what's known as "Speed Bleeders".
I've used them on two cars now and they do have a size for the early TD's (drum brakes).

http://www.speedbleeder.com/

Roy
Roy Challberg

This thread was discussed on 27/11/2018

MG TD TF 1500 index

This thread is from the archive. The Live MG TD TF 1500 BBS is active now.