|
Silver g500
Regular
Date registered: Nov 2013
Location: Amelia Island, FL
Vehicle(s): 2003 G500, 1998 Volvo V70
Posts: 63
| Diff Lock Bleeding
Need some advice.
First time changing Diff lock fluid.
Set-up my Motive with Castrol GMA at 2 bar.
Opened the front bleed screw and only a few drops come out.
The rear, nothing.
Has anyone else had this? Could the systen be clogged?
There is pressure in the system, when I release it at the Motive unit.
Have not engaged the locks for a while.
Thanks, Garth  |
|
| |
|
DUTCH
Administrator Doppelgänger
Date registered: Apr 2006
Location: US, GA, Atlanta
Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter
Posts: 9963
| RE: Diff Lock Bleeding
Spomething is definitely plugged. You should get flow at both.
Attachments
----------------
 Diff_Lock_Bleed.pdf (81KB - 51 downloads)
|
|
| |
|
G-AMG
G-Class DIY Host
Date registered: May 2006
Location: South Texas
Vehicle(s): '04 G55, '80 280GE, '99 S420, '98 E320, 2011 E350
| Re: Diff Lock Bleeding
Might be worth trying a "Back-Bleeding"?? |
|
| |
|
DUTCH
Administrator Doppelgänger
Date registered: Apr 2006
Location: US, GA, Atlanta
Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter
Posts: 9963
| Re: Diff Lock Bleeding
G-AMG - 4/12/2014 2:48 PM
Might be worth trying a "Back-Bleeding"??
Can that be done with the intensifiers? |
|
| |
|
Silver g500
Regular
Date registered: Nov 2013
Location: Amelia Island, FL
Vehicle(s): 2003 G500, 1998 Volvo V70
Posts: 63
| Re: Diff Lock Bleeding
Thanks guys.
I put the preasure sytem back on and will let it slowly (hopefully) push out the old oil. If nothing improves I try your Back-Bleeding.
I've been slowly doing the maintenance items (have 50k miles). I don't think the previous ower did any maintenance, just changed the original plugs today and the Diff. Oil (nasty) last week.
G |
|
| |
|
G-AMG
G-Class DIY Host
Date registered: May 2006
Location: South Texas
Vehicle(s): '04 G55, '80 280GE, '99 S420, '98 E320, 2011 E350
| Re: Diff Lock Bleeding
DUTCH - 4/12/2014 3:18 PM
G-AMG - 4/12/2014 2:48 PM
Might be worth trying a "Back-Bleeding"??
Can that be done with the intensifiers?
YES.
Image #6
http://www.pointedthree.com/disc/forums/showthread.php?tid=20552&po... |
|
| |
|
NHDave
Extreme Veteran
Date registered: Dec 2013
Location: Seacoast NH.
Vehicle(s): 2004 AMG
Posts: 464
| Re: Diff Lock Bleeding
How did you make out with bleeding the Diffs?
I had a very hard time doing mine, especially the front!
The line was filled with some sort of sludge.
|
|
| |
|
G-AMG
G-Class DIY Host
Date registered: May 2006
Location: South Texas
Vehicle(s): '04 G55, '80 280GE, '99 S420, '98 E320, 2011 E350
| Re: Diff Lock Bleeding
NHDave - 4/17/2014 10:12 AM
The line was filled with some sort of sludge.
Yes, this is why I bleed mine ANNUALLY!!
I have seen "Differential Fluid FECAL Material" come out of my friends' lines!! |
|
| |
|
Silver g500
Regular
Date registered: Nov 2013
Location: Amelia Island, FL
Vehicle(s): 2003 G500, 1998 Volvo V70
Posts: 63
| Re: Diff Lock Bleeding
When I started the process at 2 bar, I removed the Bleed Screw and had one drop every 10 seconds.
After about an hour I had a good stream. Used some extra fluid and let it run for a bit.
The recovered fluid was brownish green.
I definitely will do it again, annually.
Brakes were OK, good stream and not bad colour.
|
|
| |
|
nadd
Expert
Date registered: Apr 2006
Location: UAE, Dubai
Vehicle(s): G500 2016 LHD, numerous Chevys
Posts: 1285
| Re: Diff Lock Bleeding
On a G500 that hadn't been done in 12 years as far as I could tell, none would come out one end. I ordered the seal/spring kit and removed the cylinder and disassembled it as the stuff inside was solid. After thorough cleaning and replacement of seals it now bleeds great, except the light doesn't come on properly (minor adjustment!).
Strange that it was working fine before, so the fluid at the bleed screw end may solidify but there is still enough movement to operate it. |
|
| |
|
AlanMcR
Expert
Date registered: Apr 2006
Location: US, CA, Los Altos
Vehicle(s): G300DT E300DT 230SL
Posts: 3500
| RE: Diff Lock Bleeding
Would operating the locker intensifier during bleeding help clear out these blockages?
|
|
| |
|
nadd
Expert
Date registered: Apr 2006
Location: UAE, Dubai
Vehicle(s): G500 2016 LHD, numerous Chevys
Posts: 1285
| RE: Diff Lock Bleeding
AlanMcR - 4/17/2014 10:00 PM
Would operating the locker intensifier during bleeding help clear out these blockages?
Probably? I recall trying that but to no avail. Fortunately it doesn't seem the fluid in the pipes solidifies as much as it is further away from moisture/air? |
|
| |
|
NHDave
Extreme Veteran
Date registered: Dec 2013
Location: Seacoast NH.
Vehicle(s): 2004 AMG
Posts: 464
| RE: Diff Lock Bleeding
AlanMcR - 4/17/2014 5:00 PM
Would operating the locker intensifier during bleeding help clear out these blockages?
Hi Alan
I personally didn't have much luck clearing out the line when applying vacuum to the intensifier, (even with 2bar plus behind the fluid). I did notice some air and fluid mixed, squishy sound, when ever I released the vacuum?
Ended up removing the line from the wheel well to the banjo nut and rebuilt the activator. Most of the crud seems to have collected in the rubber line, IMO.
For some reason my front intensifier wasn't creating any noticeable fluid movement with vacuum applied, (even after the rebuild), so I bought a new intensifier.
A week later, I lifted all four wheels off the ground to replace the part. Before I started, thought I'd turn the key and make sure the other lockers are still working.
To my surprise, the front locker instantly engaged! It didn't hold engagement for long, but it would always engage once the dash switch was reset, (another story).
One idea as to why it began to work, perhaps the intensifier was sludge filled or the plunger seals had tarnish buildup and the new fluid dissolved the sludge?
Or some air bubble was trapped in the intensifier and it found it's way up the line and into the reservoir?
Anyway, I now have a spare intensifier, and thanks to all of you, increased knowledge of the locker operation!
Annual fluid change from here on in!
|
|
| |
