Make me confident I can replace a master cylinder

[ChrisAU]

Anyone done this before? My new to me '98 needs one. A coworker says he will help, just something I've never done before.

 

[95C1500]

It's not that hard at all

 

[phule]

Bench bleed master. Remove lines and old master. Install new. Bleed brakes. Only reason it would be hard is if you have to replace lines due to rust. You can do it!

Adam

 

[badazzbulldog]

Make sure you bench bleed the mc easiest way is mount it to the vacuum booster some masters come with the bleeding kit if not you can make it out of a length of brake line cut in half fittings on each end attach those to mc and bend them into fluid reservoir fill mc and pump pedal to cycle fluid thru,once air is pushed out remove bleeder line attach lines from the truck and bleed all 4 brakes on truck


Sent from my iPad mini

 

[BoxerPitMix]

I remember running across this when I was looking at putting a NBS master cylinder on mine...

http://www.gmt400.com/forum/showthr...NBS-master-cylinder-swap-for-firm-brake-pedal

Pretty much explains it. If you're putting an OBS one back on it, just disregard the new fittings part.
I replaced mine a while back, took all of 20 minutes or so. Remove the brake lines, 2 nuts, then after you bench bleed the new one reverse the process. I went ahead and bled my lines after I did it.
There are videos on Youtube of how to bench blead, but I think this guy is bleeding one from our trucks:
https://www.youtube.com/watch?v=USdtwqju4GY

 

[ChrisAU]

I remember running across this when I was looking at putting a NBS master cylinder on mine...

http://www.gmt400.com/forum/showthr...NBS-master-cylinder-swap-for-firm-brake-pedal

Pretty much explains it. If you're putting an OBS one back on it, just disregard the new fittings part.
I replaced mine a while back, took all of 20 minutes or so. Remove the brake lines, 2 nuts, then after you bench bleed the new one reverse the process. I went ahead and bled my lines after I did it.
There are videos on Youtube of how to bench blead, but I think this guy is bleeding one from our trucks:
https://www.youtube.com/watch?v=USdtwqju4GY

Thanks for video link, ordered one of those tools he used, looks much easier and quicker.

Now only worried about bleeding after I get the new MC on, anyone have the basic steps for that?

 

[BoxerPitMix]

Check out a brake bleeder kit at an auto parts store, makes it a hell of a lot easier than how I've done it....
Stick a jack handle between the seat/pedal, move seat forward to push it down... Crawl underneath truck, bleed it, close it. Repeat. lol
If you have somebody to pump the brake for you while you're underneath it isn't nearly as bad.

 

[98_k1500]

I would just bleed it 1 fitting down from the MC, at the ABS module. Get the air out of the system before it gets all trapped up in that booger. Should only have to bleed it about 2 pumps if it was bench bled properly. (Instructions for bench bleeding should come with the master) At that point, its 2 nuts and 2 lines. Easy as pie.

 

[DroppedAsAChild]

I think I might be doing one on the Yukon this helps alot thanks guys.

 

[scotttick]

Food for thought>>
http://www.gmt400.com/forum/showthr...NBS-master-cylinder-swap-for-firm-brake-pedal