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 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 01-13-2021, 04:08 PM   #1
jdb_us1
Registered User
 
Join Date: Nov 2016
Location: Bernville PA
Posts: 57
sealed hydraulic clutch master and slave

So....

Anyone ever see or hear of someone converting the stock hydraulic clutch slave and master cylinder to a sealed pre bled system?

I have a 1990 crew with an sm465 and hydraulic set up. Replaced the slave, master, and hose with new and have spent HOURS trying to bleed the setup (yes I have tried a power bleeder, traditional pump, hold, and bleed, and depressing the slave with the reservoir cap off). The slave and master are both reman parts.

A came across a setup for an 02 Dodge that looks like it might work with some creative engineering on brackets to get the throw right.

Thoughts?

TIA
__________________
1990 GMC CC LWB
1958 Chevy 3/4 ton flat bed
jdb_us1 is offline   Reply With Quote
Old 01-13-2021, 06:21 PM   #2
kipps
Registered User
 
Join Date: Jul 2014
Location: North-central Virginia
Posts: 767
Re: sealed hydraulic clutch master and slave

It would seem a shame. I've bled my 87 a number of times with relative ease. With a second person, it took 5 or 10 minutes tops to get it fully bled out.

Pedal down, open bleeder, close bleeder, pedal up. Repeat half a dozen times, then top off the fluid, and check for fork movement with the bleeder closed. As soon as the fork begins to move a little, just pump the dickens out of the pedal and it should gain full functionality.

Edit: I would propose that either the master or the slave is defective from the factory. They're both pretty cheap. Just buy a general rockauto set, and see if that makes a difference.
__________________
1987 C6P V20 truck, 2010 LMG 5.3, AFM delete, 2010 Camaro exhaust manifolds, 1997 nv4500, 1991 np241c, hydroboost, 2005 14bff axle & driveshaft, drop-n-lock gooseneck, 4.10 gears, 33" tires, stock suspension. Still a work in progress. Any questions or suggestions are welcome!
kipps is offline   Reply With Quote
Old 01-13-2021, 11:50 PM   #3
sweetk30
Registered User
 
sweetk30's Avatar
 
Join Date: May 2012
Location: horseheads,ny rust belt
Posts: 2,685
Re: sealed hydraulic clutch master and slave

I had to bleed mine with it all hooked up but out of the truck and holding the master upside down .

Found the aftermarket master had a bubble size dome inside the reservoir to master nipple . It would let a bubble sit inside and random suck in and out .

Once i did this problem solved for years .
__________________
77-k30lb BIG truck build .
87-k30lb budget beater build .
85-k30lb the plow machine build .
85-c10sb summer fun toy .
-----------------------------
HOLLEY SNIPER efi = worst case of p.i.t.a i ever had .

EDELBROCK pro flo 4 = best deal going so far . love my setup works great.
sweetk30 is offline   Reply With Quote
Old 01-14-2021, 09:56 AM   #4
jdb_us1
Registered User
 
Join Date: Nov 2016
Location: Bernville PA
Posts: 57
Re: sealed hydraulic clutch master and slave

Quote:
Originally Posted by sweetk30 View Post
I had to bleed mine with it all hooked up but out of the truck and holding the master upside down .

Found the aftermarket master had a bubble size dome inside the reservoir to master nipple . It would let a bubble sit inside and random suck in and out .

Once i did this problem solved for years .
I thought about this last night, I think I will give it a try before attempting any sort of retrofit.
__________________
1990 GMC CC LWB
1958 Chevy 3/4 ton flat bed
jdb_us1 is offline   Reply With Quote
Old 01-14-2021, 09:58 AM   #5
jdb_us1
Registered User
 
Join Date: Nov 2016
Location: Bernville PA
Posts: 57
Re: sealed hydraulic clutch master and slave

Quote:
Originally Posted by kipps View Post
It would seem a shame. I've bled my 87 a number of times with relative ease. With a second person, it took 5 or 10 minutes tops to get it fully bled out.

Pedal down, open bleeder, close bleeder, pedal up. Repeat half a dozen times, then top off the fluid, and check for fork movement with the bleeder closed. As soon as the fork begins to move a little, just pump the dickens out of the pedal and it should gain full functionality.

Edit: I would propose that either the master or the slave is defective from the factory. They're both pretty cheap. Just buy a general rockauto set, and see if that makes a difference.
They are reman parts, which is suspect. I have had very bad experiences with reman hydraulic parts in the past. Owned a 79 Cj7 and swear that I put 5 or 6 brake master cylinders on it before I got one that didnt leak.
__________________
1990 GMC CC LWB
1958 Chevy 3/4 ton flat bed
jdb_us1 is offline   Reply With Quote
Old 01-14-2021, 10:12 AM   #6
SunSoaked
Registered User
 
SunSoaked's Avatar
 
Join Date: Dec 2011
Location: Yuma Arizona
Posts: 1,378
Re: sealed hydraulic clutch master and slave

I fought with my hydro clutch for hours. Then I went to Napa and saw this. It literally bled the clutch in less than 2 minutes. Perfect firm pedal.

Only way to go.
Attached Images
 
SunSoaked is offline   Reply With Quote
Old 01-14-2021, 11:00 AM   #7
v30crewcab
Registered User
 
v30crewcab's Avatar
 
Join Date: Apr 2012
Location: Chatt Tn
Posts: 748
Re: sealed hydraulic clutch master and slave

the best way to bleed a slave it to take it loose from the trans, and slowly push it in and out. it will move alot of fluid that way and it bleeds fairly quick. never had one that wouldn't bleed out that way unless something was bad.
__________________
88 military v30 crewcab shortbed
5.9 cummins, nv4500, 205
http://67-72chevytrucks.com/vboard/s...d.php?t=522535
v30crewcab is offline   Reply With Quote
Old 01-14-2021, 07:58 PM   #8
jdb_us1
Registered User
 
Join Date: Nov 2016
Location: Bernville PA
Posts: 57
Quote:
Originally Posted by v30crewcab View Post
the best way to bleed a slave it to take it loose from the trans, and slowly push it in and out. it will move alot of fluid that way and it bleeds fairly quick. never had one that wouldn't bleed out that way unless something was bad.
Posted via Mobile Device
jdb_us1 is offline   Reply With Quote
Old 01-14-2021, 08:00 PM   #9
jdb_us1
Registered User
 
Join Date: Nov 2016
Location: Bernville PA
Posts: 57
Re: sealed hydraulic clutch master and slave

That is how I have been trying the last few times. I get a pedal enough to barely disengage and shift and two days later I lose everything. So something is not sealing. Which sends me back to my original idea to be able to install a problem system.
Posted via Mobile Device
jdb_us1 is offline   Reply With Quote
Old 01-14-2021, 08:01 PM   #10
jdb_us1
Registered User
 
Join Date: Nov 2016
Location: Bernville PA
Posts: 57
Quote:
Originally Posted by SunSoaked View Post
I fought with my hydro clutch for hours. Then I went to Napa and saw this. It literally bled the clutch in less than 2 minutes. Perfect firm pedal.

Only way to go.
I have a Blue Point version of the same hand pump, have not had any luck with it except on wheel cylinders and calipers.
Posted via Mobile Device
jdb_us1 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 04:27 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Copyright 1997-2020 67-72chevytrucks.com