The FSM states to bleed from N. I think N is the way to go because you have pressure built up as well
LX570 AHC Globe/Accumulator Replacement (18 Viewers)
- Thread starter NKP Garage
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bloc
SILVER Star
L will have the lowest system hydraulic pressure so it makes sense not to do it then.
Did you just fill up the reservoir first?
Yep.
Opened the cap, inserted 3/8” tubing with a funnel at the end of it, filled res, left tube in and laid funnel on top of tire during whole process.
Filled Resi as needed with funnel.
Okay so cap off? I ask because last fluid change I kept getting an error cycling the pump when bleeding that went away once I put the cap on. Could be total coincidence AHC voodoo though.
It is weird, seems like very mixed reports on this. I can say for sure that when I was replacing a lot of fluid, that my pump would stop building pressure (usually 2-3mpa) if i left the cap on. Once I pulled the cap off, it would build pressure normally. There was a definitive break in pressure when I pulled the cap.
Maybe I should bleed and leave the cap off. I left it on after I topped off.
Bleed in N
Front Driver
Rear Passenger
Front Passenger
Rear Driver
Per the FSM
100% cap was off when I did it last weekend. it wasnt my rig, so give a crap was low.... that's probably good advice for all of us. WHen it's our own rigs, pucker factor is high. as the kids would say, just yolo it.
I started this project the other day. I bled the DF and DR no issue. I tried to get the DF globe off, first with an impact gun, and then with a breaker bar, but the nut was rounded at that point. I ordered an extractor socket set (17,19,21,22mm) and a strap wrench. I then moved to the DR and was able to get the globe off with a breaker bar and pipe extension. There was rust on the mating surface of the globe and receiving AHC unit. It was late so I stopped work that day, but applied rust penetrant to the other 3 globes before wrapping up. Today I tried the 21mm extractor socket and the strap wrench with no success. Any other ideas before I try drilling a hole and jamming in a pry bar? If that’s the next step, where should I drill to have the best leverage? Is there any issue with leaving the car bled down on the DS while I work on this DF globe when I can (may be a few days)? I took the AHC protection bracket off the PS, but haven’t done anything to those globes yet other than apply the rust penetrant.
Pics below of DF globe as it currently sits.
Pics below of DF globe as it currently sits.
Just drill the hole lol. That’s what I did. Just took it slow, pressure was surprisingly low
Lol I thought of you with the drilling. Where should I drill at on the globe?
At the widest point so you can jam a pry bar into it and get maximum leverage
And where you have the most swing and length for the prying tool
bloc
SILVER Star
Another route would be to file or grind a notch into the outer circumference then smack that flat area with a punch and hammer. I used this method to get the accumulators off the dead from cancer KDSS valve I dismantled, and those were much smaller diameter.
IMPACT gun?? first move should have been breaker bar with 21mm 6 sided socket.
And did you drain both the DF and DR?
You should be draining one corner at a time, then swapping out the globe, then starting the rig to let the pump replace the fluid.... then bleed all the air out of that corner and move on to the next.
bloc
SILVER Star
Good point radman: this is exactly the wrong application for an impact gun.
The globe is relatively high mass, and an impact gun works by using a hammer to shock a fastener loose from whatever solid object it’s attached to, so the impact gun will literally try to shear the hex right off the globe.
The globe is relatively high mass, and an impact gun works by using a hammer to shock a fastener loose from whatever solid object it’s attached to, so the impact gun will literally try to shear the hex right off the globe.
Thanks for the assistance everyone! In every challenge is a learning opportunity and I certainly learned a few things and picked up some new tools. After drilling the hole last night, I tried the pry bars I had and none fit so I ordered a new tapered pry bar. It was delivered today and I finally got the DF globe off! I got the other two globes off no problems and bled everything as directed. Below is the offending globe.
32cls6speedmt
SILVER Star
Don’t know yet. After changing them all out and bleeding everyone, I wrapped it up for the night so I haven’t taken it for a test drive yet. 127k miles.
- Thread starter
- #360
Nice work! I bet it feels good to have that behind you
