Ahc pressure (1 Viewer)

[saudi]

Does anybody know what is the pressure in the ahc pipework of a landcruiser 100

 

[mmbirtcher]

Why do you ask? I believe the only pressures that are important to the system functions are at the pump and accumulators. They can be read via tech stream or other readers.

 

[saudi]

Why do you ask? I believe the only pressures that are important to the system functions are at the pump and accumulators. They can be read via tech stream or other readers.

I’m replacing pipes so I want to know

 

[MUDZLLA]

Pipes? Try SST tubing.

 

[saudi]

Pipes? Try SST tubing.

It’s flexi pipes

 

[MUDZLLA]

try flexi SS tubing. Anyway don't listen to me I don't have AHC. Most people rip it out when it acts up and put in proper torsion bars and springs

 

[saudi]

try flexi SS tubing. Anyway don't listen to me I don't have AHC. Most people rip it out when it acts up and put in proper torsion bars and springs

No ahc better ride I’m making up soares

 

[suprarx7nut]

11 MPa is the upper end I think. ~110 atm or 1600 psi, but you'd probably want tubing rated to double that.

 

[nukegoat]

I'd just run some vinyl tube with some hose clamps

 

[saudi]

I'd just run some vinyl tube with some hose clamps

At1600psi!!’

 

[nukegoat]

At1600psi!!’

get an impact wrench on the hose clamps, obviously

 

[uHu]

At 1600 psi ?’

get an impact wrench on the hose clamps, obviously

Only for vehicles equipped with Night View. Without it, you are lost in the dark, especially with all that ahc fluid everywhere.

 

[IndroCruise]

Does anybody know what is the pressure in the ahc pipework of a landcruiser 100

Hi Saudi,

Your question is an unusual assignment. An idea of the pressures in the various parts of the AHC system can be seen in the attachment and in the FSM. The static line pressures near the 'globes' also could be measured using a pressure gauge if you wanted to go that much trouble -- but again the FSM gives a reasonable guide as to what static pressures to expect (when the vehicle is not moving). However, this information does not account for the high pressure peaks which will be experienced when the vehicle is being driven over bumps in the road etc. Peak pressures -- 'spikes' -- may be extreme even if transient and pipes, hoses and unions must be able to cope with the operating pressures actually experienced by the system. As you know, the AHC pipework is mainly steel with high pressure unions at each junction. The flexible hoses in the system mainly are those connecting the tops of the ‘shock absorbers’ to the steel pipework. As you probably already have discovered, these hoses are specialist items and they are very expensive – in part because of the nature and duty requirements of the hose, in part because of the high pressure fittings swaged onto both ends of the hose and in part because the maker likes to make money as well as hoses! If new hoses are needed – and this is a highly unusual requirement -- then OEM parts would be the safest and most reliable approach. If Toyota/Lexus dealers are unhelpful, then replacements (or at least the part numbers and maybe some pictures or diagrams) may be obtained from:

PartSouq Auto Parts Around the World
or
MegaZip - Genuine OEM Parts From Japan, USA, UAE | Online Store

If supply difficulties arise or you wish to explore made-up hoses and fittings, an alternative might be to discuss hose and fitting requirements with a hydraulics workshop such as those who deal with maintenance of heavy highway trucks or with agricultural, construction, mining, or similar equipment with some hydraulic functions. In your part of the world Hydraulic Hose Repair | Pirtek 24/7 Hydraulic Service comes to mind and has branches near Manchester. To avoid surprises, just don't let them use anything other than genuine Toyota/Lexus AHC fluid in the AHC system.

To re-state the obvious: Poor quality high pressure hydraulic hose and fittings are extremely dangerous because failure is unpredictable and can happen suddenly. Not only does this make a mess and possibly disable the vehicle but it can be injurious if a person happens to be working under the vehicle at the time – it is a good way to lose an eye or be injured by the vehicle suddenly dropping when AHC system pressure is lost.

 

[suprarx7nut]

Hi Saudi,

Your question is an unusual assignment. An idea of the pressures in the various parts of the AHC system can be seen in the attachment and in the FSM. The static line pressures near the 'globes' also could be measured using a pressure gauge if you wanted to go that much trouble -- but again the FSM gives a reasonable guide as to what static pressures to expect (when the vehicle is not moving). However, this information does not account for the high pressure peaks which will be experienced when the vehicle is being driven over bumps in the road etc. Peak pressures -- 'spikes' -- may be extreme even if transient and pipes, hoses and unions must be able to cope with the operating pressures actually experienced by the system. As you know, the AHC pipework is mainly steel with high pressure unions at each junction. The flexible hoses in the system mainly are those connecting the tops of the ‘shock absorbers’ to the steel pipework. As you probably already have discovered, these hoses are specialist items and they are very expensive – in part because of the nature and duty requirements of the hose, in part because of the high pressure fittings swaged onto both ends of the hose and in part because the maker likes to make money as well as hoses! If new hoses are needed – and this is a highly unusual requirement -- then OEM parts would be the safest and most reliable approach. If Toyota/Lexus dealers are unhelpful, then replacements (or at least the part numbers and maybe some pictures or diagrams) may be obtained from:

PartSouq Auto Parts Around the World
or
MegaZip - Genuine OEM Parts From Japan, USA, UAE | Online Store

If supply difficulties arise or you wish to explore made-up hoses and fittings, an alternative might be to discuss hose and fitting requirements with a hydraulics workshop such as those who deal with maintenance of heavy highway trucks or with agricultural, construction, mining, or similar equipment with some hydraulic functions. In your part of the world Hydraulic Hose Repair | Pirtek 24/7 Hydraulic Service comes to mind and has branches near Manchester. To avoid surprises, just don't let them use anything other than genuine Toyota/Lexus AHC fluid in the AHC system.

To re-state the obvious: Poor quality high pressure hydraulic hose and fittings are extremely dangerous because failure is unpredictable and can happen suddenly. Not only does this make a mess and possibly disable the vehicle but it can be injurious if a person happens to be working under the vehicle at the time – it is a good way to lose an eye or be injured by the vehicle suddenly dropping when AHC system pressure is lost.

Your last paragraph might be worth re-iteration. Hydraulic hose failure injuries are enough to make the average person (and definitely me) queasy. It's serious stuff. Google it if you feel like testing your stomach. Air embolisms and the like are nothing to glaze over when considering screwing around with high pressure lines. If you're not going to use OEM stuff, make sure it's even better. Don't cut corners or you might cut your hand off.... [dad joke sigh].

 

[saudi]

Hi Saudi,

Your question is an unusual assignment. An idea of the pressures in the various parts of the AHC system can be seen in the attachment and in the FSM. The static line pressures near the 'globes' also could be measured using a pressure gauge if you wanted to go that much trouble -- but again the FSM gives a reasonable guide as to what static pressures to expect (when the vehicle is not moving). However, this information does not account for the high pressure peaks which will be experienced when the vehicle is being driven over bumps in the road etc. Peak pressures -- 'spikes' -- may be extreme even if transient and pipes, hoses and unions must be able to cope with the operating pressures actually experienced by the system. As you know, the AHC pipework is mainly steel with high pressure unions at each junction. The flexible hoses in the system mainly are those connecting the tops of the ‘shock absorbers’ to the steel pipework. As you probably already have discovered, these hoses are specialist items and they are very expensive – in part because of the nature and duty requirements of the hose, in part because of the high pressure fittings swaged onto both ends of the hose and in part because the maker likes to make money as well as hoses! If new hoses are needed – and this is a highly unusual requirement -- then OEM parts would be the safest and most reliable approach. If Toyota/Lexus dealers are unhelpful, then replacements (or at least the part numbers and maybe some pictures or diagrams) may be obtained from:

PartSouq Auto Parts Around the World
or
MegaZip - Genuine OEM Parts From Japan, USA, UAE | Online Store

If supply difficulties arise or you wish to explore made-up hoses and fittings, an alternative might be to discuss hose and fitting requirements with a hydraulics workshop such as those who deal with maintenance of heavy highway trucks or with agricultural, construction, mining, or similar equipment with some hydraulic functions. In your part of the world Hydraulic Hose Repair | Pirtek 24/7 Hydraulic Service comes to mind and has branches near Manchester. To avoid surprises, just don't let them use anything other than genuine Toyota/Lexus AHC fluid in the AHC system.

To re-state the obvious: Poor quality high pressure hydraulic hose and fittings are extremely dangerous because failure is unpredictable and can happen suddenly. Not only does this make a mess and possibly disable the vehicle but it can be injurious if a person happens to be working under the vehicle at the time – it is a good way to lose an eye or be injured by the vehicle suddenly dropping when AHC system pressure is lost.

I’m having spares made I have the metal pipes . I got our local hydraulic supplier now to fit new flexi hoses . It’s costing £30 per pipe which in the scheme of things is reasonable the pipes are rated at over 200 bar so should be ok

 

[ticoman]

You could look around for a used system from those silly people that remove this wonderful system for Shocks etc. In my opinion, they do not deserve to own a Cruiser and should be sentenced to a life time of Jeeps.

 

[saudi]

ive got old pipes im replacing the hoses , the new flexi pipes are rated 300 bar so all good

 

[nukegoat]

You could look around for a used system from those silly people that remove this wonderful system for Shocks etc. In my opinion, they do not deserve to own a Cruiser and should be sentenced to a life time of Jeeps.

Lol AHC sucks

 

[saudi]

Only if you don’t know how to repair or understand it

 

[nukegoat]

Only if you don’t know how to repair or understand it

or you need something better