Replacing Master Clutch Cylinder - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Reply
 
Thread Tools
  #1  
Old March 31st, 2016, 12:02 PM
mightymo's Avatar
mightymo
Status: Offline
matthew m
'95 Disco 300TDI
Member
 
Join Date: Mar 2011
Location: Charlottesville, VA
Posts: 287
Registry
Replacing Master Clutch Cylinder

Replacing the clutch mater cylinder on my 300tdi Disco 1 soon. The replacing of the part seems super easy, but I have to also reverse bleed it as well right. After some research on forums and the Youtubes, I can do this with an oil can and hose (I think). Where do I connect the hose to? From the top where they master cylinder is, or where the pipe goes from the cylinder? Sorry, I've never had to reverse bleed before and have no real idea.
Attached Thumbnails
Click image for larger version

Name:	0331161118a_HDR.jpg
Views:	135
Size:	98.0 KB
ID:	146376  
__________________
--------------------------
1995 Disco 300TDI
1991 D130 (SOLD)
1997 D90 NAS (SOLD)
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old March 31st, 2016, 12:13 PM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,232
Registry
To reverse bleed you would connect to the bleed nipple on the slave cylinder.
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
  #3  
Old March 31st, 2016, 08:29 PM
agentmulder
Status: Offline
Agent Mulder
2008 110 PUMA
Member
 
Join Date: Dec 2015
Location: NZ
Posts: 46
Registry
Yip, that's why it's called a reverse bleed - you're letting the bubbles natural tendency to raise to your advantage...

I got a long hose, connected it to the bleed valve and ran it up the the top of the engine, poured [strikethrough]oil[/strikethrough] brake-fluid into it until it was bubble free (no use introducing more air!), then connected the oil can. Might take a few tries to get it bubble free... Then after sucking out the old [strikethrough]oil[/strikethrough] brake-fluid in the master reservoir with a syringe, gave it 10 or so good pumps on the oil can to fill it up again (your number of pumps may differ), kept on doing this until both of the following were true:
  1. the [strikethrough]oil[/strikethrough] brake-fluid is clean
  2. there are zero bubbles popping up after a few good and vigorous pumps

Then did a few more iterations just for shits and giggles.

The final trick is disconnecting the hose from the bleed valve without dripping it all on your face, this was managed by putting clamping clips on the ends of the hose beforehand.

Some folk in an effort to cut out the syringe and save some fluid actually form a loop doing this by making the fluid from the master go directly back into the oil can, quite a nice idea, but if you're cleaning out old [strikethrough]oil[/strikethrough] brake-fluid best to rid the system of it. Make sure you take it off to a local garage that can take care of it in a slightly more environmentally aware fashion than dumping in the drain.
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old March 31st, 2016, 08:44 PM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,232
Registry
Hopefully you use brake fluid and not oil.
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
  #5  
Old March 31st, 2016, 08:55 PM
agentmulder
Status: Offline
Agent Mulder
2008 110 PUMA
Member
 
Join Date: Dec 2015
Location: NZ
Posts: 46
Registry
I use soda-stream cola flavour.
Reply With Quote
  #6  
Old April 1st, 2016, 08:07 AM
mightymo's Avatar
mightymo
Status: Offline
matthew m
'95 Disco 300TDI
Member
 
Join Date: Mar 2011
Location: Charlottesville, VA
Posts: 287
Registry
Thanks guys. So I just hook up the hose to the nipple on the master cylinder (after its installed) and pump away (brake fluid) until there are no bubbles? How do I know when there are no bubbles? Is there someplace else I am supposed to be looking?
__________________
--------------------------
1995 Disco 300TDI
1991 D130 (SOLD)
1997 D90 NAS (SOLD)
Reply With Quote
  #7  
Old April 1st, 2016, 11:02 AM
sherpamike's Avatar
sherpamike
Status: Offline
Mike Doligalski
'95 D90 ST
Member
 
Join Date: Oct 2003
Location: Tampa, FL
Posts: 625
Registry
As stated previously, you'll need to connect the hose to the nipple on the slave cylinder (not the master) to reverse bleed. I would imagine you would look in the reservoir for bubbles but i've never done it this way before.

Lately I wonder if one could pull a small vacuum on the system from the master/reservoir and then reverse bleed. Similarly to how vacuum coolant fillers work. Anyone tried this? I HATE bleeding the clutch...
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Tags
ac, clutch, master

Thread Tools

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Clutch master cylinder replacement Trigger Defender Technical Discussions 20 July 8th, 2015 08:01 PM
Clutch Master/Slave Cylinder Hydraulic Leak Merged Threadfest Buckon37s Defender Technical Discussions 223 September 1st, 2014 01:49 AM
Clutch Master Cylinder Billakris Defender Technical Discussions 22 November 29th, 2011 03:02 PM
Re-Sleeve ing Rear Brake and Clutch Master Cylinder COSteve Defender Technical Discussions 12 June 24th, 2006 12:33 AM
NEW Clutch Master Cylinder 4 Sale roverboy For Sale - Parts 0 October 6th, 2004 10:10 PM


All times are GMT -5. The time now is 06:24 AM.


Copyright