Did the AHC flush today. Highly recommended for those with higher mileage rigs!
Adding my info as someone who just did the flush procedure. Followed the
@radman guide on page 8 in the AHC sticky thread that worked pretty well.
- 2008 LX570
- 166,000 miles
- TN vehicle it's whole life
Biggest surprise was finding my reservoir completely empty at the outset. Given the poor viewing of the high/low marks in the dark wheel well, initially I thought I just wasn't getting suction. After 45 mins of trying different tubes, I gave up and just started pumping the new fluid in, determined I would get all the old fluid out via bleeding.
Observations:
- Took 4.1L of old fluid out. Put 5L back in.
- First bleed was foamy and dark like stout beer. I assume this was because the reservoir was empty and air got into the lines, plus it is a 14-year old vehicle with no history of being done before.
- Have multiple shop rags on hand
- Ride is noticeably more confident when driving. Also less random "drops" after parking and turning vehicle off.
Tools:
- 5L AHC fluid (2 x 2.5L cans)
- 10mm socket
- 10mm ratcheting wrench w/ open end (to open bleeders)
- 12mm ratcheting wrench w/ open end (to remove bash guard over 5th accumulator)
- Pick or paint can opener tool (to remove the strainer)
- 3/8" OD vinyl tubing (for transferring fluid)
- 1/4" OD vinyl tubing (for bleeding)
- Transfer pump or 150-300ml syringe (To create suction for removing fluid & transferring new fluid in)
- New rubber bleeder valve caps
My process:
1. Park on level surface, drive up on 4 ramps (Harbor Freight)
2. Turn on LX570, put vehicle in LOW. Turn vehicle OFF.
3. Open rear cover in right rear wheel well w/ socket
4. Turn filler tube cap 90-degrees counterclockwise & remove strainer inside
5. Suction out old fluid. Put in container where you can measure total how much you've taken out.
6. Put new fluid in (Most put in 2.5L)
7. Turn on LX570, put vehicle in NORMAL. Allow to sit 60 seconds. Turn vehicle OFF.
8. Remove 3 12mm bolts holding 5th accumulator bash guard on.
9. Remove old rubber bleeder valve cap, attach 1/4" OD tubing & run to waste container. Open bleeder and allow to drain until flow stops. (Approximately .3L) Close bleeder valve.
10. Turn on LX570. Make sure in NORMAL. Allow to sit 60 seconds for pump to refill accumulator. Turn vehicle OFF.
11. FRONT LEFT - Remove old rubber bleeder valve cap, attach 1/4" OD tubing & run to waste container. Open bleeder and allow to drain until flow stops. (Approximately .3L) Close bleeder valve. (Mine came out foamy & dark brown like a stout beer.)
12. Turn on LX570. Allow to sit 60 seconds for pump to refill accumulator. Make sure in NORMAL. Turn vehicle OFF.
13. FRONT RIGHT- Remove old rubber bleeder valve cap, attach 1/4" OD tubing & run to waste container. Open bleeder and allow to drain until flow stops. (Approximately .3L) Close bleeder valve. (Mine came out foamy & dark brown like a stout beer.)
14. Turn on LX570. Allow to sit 60 seconds for pump to refill accumulator. Make sure in NORMAL. Turn vehicle OFF.
15. Refill approx 1L of new fluid in reservoir.
16. REAR LEFT - Remove old rubber bleeder valve cap, attach 1/4" OD tubing & run to waste container. Open bleeder and allow to drain until flow stops. (Approximately .3) Close bleeder valve. (Mine came out foamy & dark brown like a stout beer.)
17. Turn on LX570. Allow to sit 60 seconds for pump to refill accumulator. Make sure in NORMAL. Turn vehicle OFF.
18. REAR RIGHT - Remove old rubber bleeder valve cap, attach 1/4" OD tubing & run to waste container. Open bleeder and allow to drain until flow stops. (Approximately .3L) Close bleeder valve. (Mine came out foamy & dark brown like a stout beer.)
19. Turn on LX570. Allow to sit 60 seconds for pump to refill accumulator. Make sure in NORMAL. Turn vehicle OFF.
20. Refill approx 1L of new fluid in reservoir.
21. FRONT LEFT - Attach 1/4" OD tubing & run to waste container. Open bleeder and allow to drain until flow stops or runs PINK. (Approximately .3L) Close bleeder valve. Put on new rubber cap. (Second bleed had no foam)
22. Turn on LX570. Allow to sit 60 seconds for pump to refill accumulator. Make sure in NORMAL. Turn vehicle OFF.
23. FRONT RIGHT - Attach 1/4" OD tubing & run to waste container. Open bleeder and allow to drain until flow stops or runs PINK. (Approximately .3L) Close bleeder valve. Put on new rubber cap. (Second bleed had no foam)
24. Turn on LX570. Allow to sit 60 seconds for pump to refill accumulator. Make sure in NORMAL. Turn vehicle OFF.
25. Put remaining new fluid in reservoir
26. REAR LEFT - Attach 1/4" OD tubing & run to waste container. Open bleeder and allow to drain until flow stops or runs PINK. (Approximately .3L) Close bleeder valve. Put on new rubber cap. (Second bleed had no foam)
27. Turn on LX570. Allow to sit 60 seconds for pump to refill accumulator. Make sure in NORMAL. Turn vehicle OFF.
28. REAR RIGHT - Attach 1/4" OD tubing & run to waste container. Open bleeder and allow to drain until flow stops or runs PINK. (Approximately .3L) Close bleeder valve. Put on new rubber cap. (Second bleed had no foam)
29. Turn on LX570. Allow to sit 60 seconds for pump to refill accumulator. Make sure in NORMAL. Turn vehicle OFF.
30. Put bash guard back on 5th accumulator
31. Put strainer back in filler tube. Put filler tube cap back on. Put wheel well cover back on
32. Back off ramps. Test LO, NORMAL, HIGH.