@Moridinbg Awesome, thanks! I'll have to see if I can find the carrying capacity of the AHC in the manual. It might be quite a search! But can def start with 550kgs.
Hi
@ikellymo -- I may be misunderstanding your purpose.
Before getting to that, my understanding is that the AHC/TEMS system – meaning the whole bunch of AHC/TEMS components end-to-end from front bumper to rear bumper – is common across all LC100 models (whether fitted, with either 2UZ-FE gasoline engine or 1HD-FTE turbodiesel engine) and also is common with LX470 models (2UZ-FE gasoline engine only) as well.
It is the same system, same design, same components across all of these models where AHC/TEMS is fitted, with only a few minor differences regarding detailing of some brackets, switches, relay positions, AHC pump position, some pipe and harness routes and various fittings such as DLC3 location, height control and damper switches on central console etc, to accommodate the differences between right hand drive and left hand drive. Nothing in the FSM at
https://lc100e.github.io/manual/ reveals any different versions of the stock AHC/TEMS system for different engine versions nor has any significant difference been found on any IH8MUD post – unless any other IH8MUD Member can point to it?
As
@Moridinbg already notes, there
are some differences in rear coil springs between right hand drive and left hand drive vehicles related to driver position and fuel tank position and whether the additional fuel subtank is fitted or not.
For vehicles fitted with AHC/TEMS, there
are differences in torsion bars and torsion bar Part Numbers for LC100 fitted with the 2UZ-FE gasoline engine versus LC100 fitted with 1HD-FTE turbodiesel. Heavier duty front torsion bars have been used by Toyota to compensate for the heavier turbodiesel engine in LC100 with AHC/TEMS.
The Height Control Accumulator is
Part No. 49130-60010. It is the same across all models.
I have just purchased a new Height Control Accumulator for my 2006 LC100 with 1HD-FTE turbodiesel and AHC/TEMS and so I had good reason to double-check all these details.
One way to check the details is simply to go and ask a Dealer's Parts Department to look up the Part Numbers. A 'sanity check' can be done on-line by entering the Part Number on the Megazip website (a reliable wholesaler of Toyota/Lexus OEM Parts in Singapore with a good on-line catalogue) and then scroll down to the the list of model types, click on these one by one and match the actual Landcruiser models to which the part applies. For example, go to:
49130-60010 - Accumulator Assy, Suspension Control Pump, Toyota OEM | Megazip.net
In my own case, at this link I go to
LANDCRUISER then click on
HDJ100 then scan the list looking for my model which is
HDJ100R-GNAEZQ as plated on my vehicle – and sure enough this Model appears in this list to which
Part No. 49130-60010 applies.
Looking under my actual vehicle I also can see Height Control Accumulator
Part No. 49130-60010 showing clearly on the original Height Control Accumulator fitted to the vehicle at the factory in Japan in 2006.
For comparison, a search for suspension details for a US-marketed LX470 such as Model UZJ100L-GNAGKA arrives eventually at the same Height Control Accumulator
Part No. 49130-60010. See
Height Control (Auto-Leveler) for 2002 - 2007 Toyota LEXUS LX UZJ100 | U.S.A. sales region, , 17824902-917385
I usually cross-check with Partsouq (a reliable wholesaler of Toyota/Lexus OEM Parts in Dubai, also with a good on-line catalogue) to be sure about Part Numbers and also to check prices. Working through
PartSouq Auto Parts Around the World using Model Types leads to the same Height Control Accumulator
Part Number 49130-60010 for LC100 and LX470 vehicles with 2UZ-FE the gasoline engine and also for the LC100 with the 1HD-FTE turbodiesel engine.
The link
https://lc100e.github.io/manual/ is an excellent FSM source but the the specific internal dimensional details you seek for the Height Control Accumulator are not shown anywhere in this Manual.
However, there are some drawings without dimensions although some volumes are shown. At the FSM link, suggest from the top tab through
New Car Features > CHASSIS > Suspension > Active Height Control and Skyhook TEMS.
This path leads to an illustrated summary of the AHC/TEMS system including a cross-section of the Height Control Accumulator. Dimensions are not shown but perhaps by taking external measurements of an actual accumulator it may be possible scale the approximate internal dimensions from the drawing. By the way, this summary also includes at the bottom of the second page the limiting weight conditions for a stock vehicle fitted with AHC/TEMS.
The usual and quite effective strategy for heavier loads on LC100 and LX470 is to recognise that the aim is to keep the front and rear AHC/TEMS pressures within their FSM-specified ranges (actually towards the lower end of the range) for best damping performance (and to avoid compromising the hydraulic system and seals with over-pressure) -- and then modify the mechanical suspension components -- specifically: adjust, re-index or replace front torsion bars, and, make a choice at the rear between airbags fitted within the coil plus new OEM springs possibly with spacers, or, stronger springs (KING KTRS-79 is a common choice). In my own case, tightening torsion bar adjusters at the front and replacement of rear springs with KING KTRS-79 was sufficient. I already had some airbags so they went in as well -- but it remains to be seen whether they are a necessary addition.
In summary, different Height Control Accumulators are not available (and if they were then different mapping of the AHC/TEMS ECU would be involved) and so it is suggested that the well-tested strategies for increased load be considered, as discussed in many IH8MUD threads. Naturally, GVWR remains a consideration.
