The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1947 - 1959 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 01-11-2011, 12:08 PM   #1
7footbed
Registered User
 
Join Date: Jan 2011
Location: Nashville TN
Posts: 3
Need Help Removing 1959 Master Cylinder

What is the proper procedure for removing the pedal hinge pin from a 1959 Chevrolet Apache 3/4 ton truck master cylinder? It is quite rusty and is in a remote area (must be done on a jack). After removing the retainer fork, there are two small flats on the end with the Alemite fitting. Does that mean that the pin is threaded? Truck is super rusty and using a hammer is going to be hard.
Clearance between frame and master is close.
Thanks in Advance !
Attached Images
 
7footbed is offline   Reply With Quote
Old 01-11-2011, 01:43 PM   #2
Wrenchbender Ret
Registered User
 
Join Date: Oct 2005
Location: Lenexa, Kansas
Posts: 4,866
Re: Need Help Removing 1959 Master Cylinder

It is suppost to slide on out but like you say it is rusty. If you can't get it out underneath you can remove the pedal shaft & take the whole assembly out. Use a 3/4 in socket on a long extension & remove the nut. Put a block of wood between the arm & the floor board. With a large drift & big hammer knock the pedal out of the arm. Then you can work on it on the bench or use a press.
Wrenchbender Ret is offline   Reply With Quote
Old 01-11-2011, 03:41 PM   #3
7footbed
Registered User
 
Join Date: Jan 2011
Location: Nashville TN
Posts: 3
Re: Need Help Removing 1959 Master Cylinder

So as I understand, the pin must be a smaller "step" diameter as it goes into the second side of the master "fork" casting, or else it would slip out the oither side?

If that's the case, I may use the two "flats" to rock the pin so it will loosen the rust, yes?
7footbed is offline   Reply With Quote
Old 01-11-2011, 03:47 PM   #4
OrrieG
Registered User
 
OrrieG's Avatar
 
Join Date: Jun 2006
Location: Idaho
Posts: 8,788
Re: Need Help Removing 1959 Master Cylinder

Nut holds the clip that holds the pin. Mine was stainless steel and did take a press to get out, but I had the MC out of the truck. I reused the pin on my current set up and made is a tight press fit too. Be carefull remember you are dealing with a relatively solid SS pin in cast piece. If you can get a vice grip around it so it twists that might help break it loose. a little emery cloth will help smooth the parts that have to slide thru the cast bracket. Penetrant will not hurt either.
__________________
1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread
1964 Chevelle Malibu w/ 355-350TH (daily driver)
Helpful AD and TF Manual Site Old Car Manual Project
OrrieG is offline   Reply With Quote
Old 01-11-2011, 05:37 PM   #5
7footbed
Registered User
 
Join Date: Jan 2011
Location: Nashville TN
Posts: 3
Re: Need Help Removing 1959 Master Cylinder

Stainless Steel.....that goes help the thought process.
The pin would have to be two different diameters, correct?
If not it would vibrate out the passenger side.

Mine must be done on the vehicle. I can't use a torch.
It's been drenched in "teflon ease" and Aerokroil.

Thanks Again
7footbed is offline   Reply With Quote
Old 01-11-2011, 07:20 PM   #6
Russell Ashley
Senior Member
 
Russell Ashley's Avatar
 
Join Date: May 2010
Location: Lawrenceville, Ga
Posts: 2,484
Re: Need Help Removing 1959 Master Cylinder

I thought something looked different about the image you posted but had to look at it a while to realize what it is. It is a mirror image and makes the bolt hole and lock plate appear to be on the wrong side. This is a correct view.
On my 57 3100 there is no step on the pin, it's just a tight fit. It's not much trouble to do it like Wrenchbender suggested and take the pedal arm out with the master cylinder. I did mine that way but I wanted to paint the arm anyway. I used a ball joint puller instead of the 2X4 method to remove the pedal shaft from the arm but either way works. If you really don't want to do it that way you might try to get a wrench on the flats and rotate the pin to loosen it up.
Attached Images
 
Russell Ashley is offline   Reply With Quote
Old 08-12-2020, 01:46 PM   #7
Second Series
Registered User
 
Second Series's Avatar
 
Join Date: May 2015
Location: Tukwila Washington
Posts: 203
Re: Need Help Removing 1959 Master Cylinder

I'm glad I searched for this! This is exactly what I need to know since I started to remove the master cylinder in my '55 yesterday. I'll try to get that pin out, or try a ball joint puller on the arm.
__________________
'47 Panel to '88 K2500 Frame Swap
Mechanical Speedometer Drive Solution
1947.2 1 ton Chevy Panel
1955.2 Chevy 6700 Bus/RV
1990 Chevy K1500
Second Series is offline   Reply With Quote
Old 08-13-2020, 12:41 PM   #8
dsraven
Registered User
 
Join Date: Nov 2010
Location: calgary alberta
Posts: 4,196
Re: Need Help Removing 1959 Master Cylinder

if not doing a numbers matching resto maybe think about a dual master cylinder. they have a front and a rear circuit so if you blow a line you still have the other circuit to stop the truck. otherwise you better have a good E-brake.
better to remove the whole thing and get it out where you can work on it. less damage happens that way. also less knuckle bandages.....
dsraven is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 03:25 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Copyright 1997-2020 67-72chevytrucks.com