Any helpful tricks of the trade to r/r a master cylinder on my 84 d-50? Its the older style with smaller reservoirs. Ive never done anything like this so any helpful hints are appreciated.

cjm

Russell gimmee a ring!

Super easy

I just did one on my 89 d50 and went perfect... when you get the master cylinder it will come with instructions of how to bench bleed it first then install it on the vehicle and bleed the vehicle brakes.

when you are loosening the brake lines on the master cylinder make sure to be careful if they are corroded and when you bleed the brakes always do the wheel farthest from th master cylinder and work your way closer.

Ive been reading about replacing with a newer 6cyl Montero master cylinder, Is that an option do you think?

Usually, people install the V6 master cylinder with the V6 brake booster. The difference is that the V6 master cylinder has a larger bore, (Which is needed with larger calipers) which would normally increase the pedal effort, but the V6 dual diaphram brake booster reduces the pedal effort overall.

Converting over to V6 Montero calipers and rotors really increases the stopping power on the older models. On my buddy's '86 Montero, I used '95 SR Montero front brake parts (Two piston calipers/thickest large diameter rotors) with a junkyard '89 V6 booster and new '89 V6 master cylinder, with '88 Montero 4 cyl rear wheel cylinders (1/16" larger than the '86 ones). Really makes a difference, and the parts cost about the same as stock replacements <img src="/forums/images/graemlins/kewl.gif" alt="" />

You would have to ask the experts here or study the parts manuals to see if the '84 D50 (4x4) uses the same brake pars as the early Gen 1 Montero, if so, then the V6 Montero parts upgrade will work! Note: The Gen 1 V6 Montero brake booster may or may not bolt on to the firewall. I think there were some V6 D50's/Mighty Maxes which might fit better if the booster is differently mounted between the trucks and the Monteros.

I'm in Durango, CO and Farmington/Bloomfield/Blanco, NM for another 2 weeks.

Master cylinder is easy, though. The guys above gave good info.

Get a set of metric flare nut wrenches - the nuts on the hard lines are very soft and will round off very easily with normal open end wrenches - use penetrating juice, too.

FYI

A ms and BB from a 89 Mighty Max il NOT fit a 84 D50.....holes dont line up, BB studs arent long enough. Oh well....the saga continues.............