Definitive list of AHC maintenance items (8 Viewers)

[PabloCruise]

Can anyone steer me to some good 30mm spacers?

Trim Packers

 

[2001LC]

I think Iron Man supplies these with their lifts? My friend had a set left over...

Does your friend want to part with them. I need then right away?

I installed some, but didn't get much change in pressure. I should have gone with King springs.

Surprising!

 

[trdcorolla]

I installed some, but didn't get much change in pressure. I should have gone with King springs.

Yeah, my pressures didn't change much either (but at least now i'm at the max spec for the rear pressure), i'm 1/4" high in the rear, this weekend i'll adjust the rear sensor and hopefully the pressure goes down more.

 

[2001LC]

Trim Packers

Those fit in lower bucket right?

 

[PabloCruise]

Those fit in lower bucket right?

Well, those don't look like mine, so maybe.

Mine fit up above the spring:

 

[camino70]

I went from 7.6 with 200K springs, to 7.4 with new oem springs, to 7.1 with 30mm spacers added to oem springs.

 

[klax18]

As another data point my rear pressures went from 6.9 to 4.3 after installing kings. How ever the 4.3 was without spare tire, not that would make big difference.

 

[trdcorolla]

I went from 7.6 with 200K springs, to 7.4 with new oem springs, to 7.1 with 30mm spacers added to oem springs.

I have similar numbers to you with my 95k springs. Got new oem Toyota AHC springs and a 30mm slee spacers and i'm at 6.8 in the rear now. (yes my fronts are spec) My rear heights are 20.5 and 20.75. I wonder if I get both rear at or slighly below 20.5 how much my pressure will go down.

 

[PADDO]

You guys that aren't seeing the expected drops in rear pressures when spacers and new coils are fitted might try doing your rear pressure readings with the fluid temp sensor disconnected - as per the FSM. I've never noticed any difference [thought it might just be a step to confirm the temp sensor disconnect throws a DTC??] in readings but your results may differ.

 

[PabloCruise]

As another data point my rear pressures went from 6.9 to 4.3 after installing kings. How ever the 4.3 was without spare tire, not that would make big difference.

That is very useful, thank you!
Were your front pressures at or near 6.9?
How was the ride with pressures that low in the rear?

 

[trdcorolla]

You guys that aren't seeing the expected drops in rear pressures when spacers and new coils are fitted might try doing your rear pressure readings with the fluid temp sensor disconnected - as per the FSM. I've never noticed any difference [thought it might just be a step to confirm the temp sensor disconnect throws a DTC??] in readings but your results may differ.

I won't have access to my LX till tonight, where is the fluid temp sensor? I'm guessing it's built into the AHC fluid reservoir?

 

[PADDO]

I won't have access to my LX till tonight, where is the fluid temp sensor? I'm guessing it's built into the AHC fluid reservoir?

It's on the side of the pump assembly, rear most connector with 2 wires, the center connector with 3 wires is your pressure and the most forward connector with the 2 heavier blue and white wires is your pump motor.

 

[klax18]

That is very useful, thank you!
Were your front pressures at or near 6.9?
How was the ride with pressures that low in the rear?

Yes, front pressures are at 6.7 and ride height readings are all between -1 and -2mm.
Ride over bumps at higher speeds is very comfortable. But I'd say its underdamped at 4.3 as its more floaty now. And handling is not as crisp in the sportier settings. I'm prepping for sliders so not going to adjust until after that. Stock size street tires for now.

 

[PabloCruise]

Yes, front pressures are at 6.7 and ride height readings are all between -1 and -2mm.
Ride over bumps at higher speeds is very comfortable. But I'd say its underdamped at 4.3 as its more floaty now. And handling is not as crisp in the sportier settings. I'm prepping for sliders so not going to adjust until after that. Stock size street tires for now.

Ah, no sliders. Do you have any other extra weight on the rig?

 

[johsti]

I connected techstream to check the front and rear pressure this morning. I'm fairly certain the rear springs have never been replaced by the previous owner. This is for a 2005 with 62k miles. The AHC fluid was flushed about 8 or 9k miles ago and I'm seeing about 11 graduations between L and H. Based on these figures, should I adjust the front torsion bars and call it a day? Or should I consider replacing the rear springs too?

 

[trdcorolla]

It's on the side of the pump assembly, rear most connector with 2 wires, the center connector with 3 wires is your pressure and the most forward connector with the 2 heavier blue and white wires is your pump motor.

Thanks @PADDO , with the temp sensor disconnected I show 6.7 for the front and 6.0 for the rear with new Toyota AHC springs and a Slee 30mm spacer, thanks! When I get more funds i'll replace the globes, i'm at 5 grads even after a flush and adjusting the tb's and the new rear springs and spacer.

 

[Yavo]

That is a very good price. Unfortunately I can't find them on the site for my 1998 LX470 (UZJ100R-GNPGKQ, 2UZ-FE) or a similar model.

Could you post a direct link to the ones you bought, or post the exact description and part number?

Thanks.

EDIT:
I didn't drill down far enough. I found these two items;
Height control (auto-leveler) for Toyota Land Cruiser UZJ100R - Genuine parts Part 49141-60010 ACCUMULATOR, FRONT SUSPENSION CONTROL
Height control (auto-leveler) for Toyota Land Cruiser UZJ100R - Auto parts Part 49151-60010 ACCUMULATOR, REAR SUSPENSION CONTROL

Are these what you bought, two of each?

Currently AUD$172.80 each, AUD$691.20 total, plus shipping.

I am looking at refreshing my system in the next few months. Looks like the prices have gone up a bit and was wondering if this is still the best supplier for inexpensive OEM globes..?

This thread is awesome, BTW

 

[Lucky Strike]

I contacted kings to get their official specs on the rear ahc springs

The KTRS-79 are a linear rate coil 130lb in rate. 430mm free height and 14.5mm wire.

 

[Lucky Strike]

As another data point my rear pressures went from 6.9 to 4.3 after installing kings. How ever the 4.3 was without spare tire, not that would make big difference.

I think the spare (about 50#) would make a difference in the .2 - .3 range.

 

[uHu]

An AHC related TSB attached. Contains an exploded view of the AHC pump, and info about production date of the height control accumulator.
Informs of a possible cause of ahc pump malfunction.