Refresh my memory: I've locked out the hicas, and want to make it permanent with a na pump. I'm currently using a adapter to link the rear steering circuit back into the pump, but it's developed a leak. Trying to get an idea of what parts I need to gather for the conversion before I go full retard and start spinning spanners. So far I've got: Na power steering pump and reservoir. Na bracket for ps pump to block. Tensioner assy for pump Pump Pulley (3rib) Plus all existing parts off the stock tt hicas setup. I'll probably get new hoses throughout for the conversion. Need advice as to what hoses these will need to be to work with the tt steering rack. Also hoping to find out what others have done with the crank Pulley? The na ps pump is 3 rib, iirc, the tt pump is 4 rib. Do you use the tt Pulley on the na pump, or use a na crank Pulley? Where is the best place to get high pressure hoses these days? Back in the dark ages it was a job for pirtek...
I've seen the car craze site, looks like a go-er. Are you saying that running a 3 rib belt on a 4 rib pulley is going to work long term, or that both na and tt use a 3 rib belt?
isn't the low pressure moulded J-hose (runs from the reservoir to the pump) different between the NA and TT?
FYI - TT's built up to August 1993 use a 4 rib belt on the power steering. All NA's use the 3 rib belt. All TT's built from Sept 1993 (electric HICAS) also use the NA power steering system, including the power steering rack & harmonic balancer.
You only need to change the reservoir-pump J-hose, the TT high pressure one will be fine if it's in good condition. New copper washers for the high pressure banjo might be worthwhile.
I've got a na harmonic balancer, and could retrofit if needed. Other than the ps pump belt having a different number of ribs, is there any other differences between the two units? Is there any other foreseeable issues running a 3 rib belt on a 4 rib pulley?
http://www.gatestechzone.com/en/problem-diagnosis/accessory-drive-system/micro-v-belt-wear-symptoms Potentially uneven wear. Premature failure, etc. There is some tech advice in the link above.
you can just reuse the high pressure line from the TT pump, I did. i recently had one made up by Hosemart to replace the 20m of line in the factory system, but i run a PS cooler, the long hard lines arethere to cool the PS fluid as it gets very hot from being pressurised. its a straight shot from the pump to the rack the resevoir to pump "j hose" i just used a peice of straight hose suitable for hydraulic fluids, no issues over the years I've been running the 3 rib belt on a 4-rib pulley for years and over 25000ks same belt no issues
No problem running a 3 rib belt on a 4 rib pulley. I've been doing it for ages on numerous zeds. Most aftermarket underdrive pulleys only have 4 ribs for the power steering anyway and na guys run that. If you wanted to do it on the cheap you could always just de-vein your tt pump and replace whatever hose/s are leaking. I've found that decent na pumps are getting scarcer and scarcer these days.
I Thought about deveining the tt pump, but as I have the na pump of the spare engine, it was the best solution. Other than a bucket of bolts, looks like the pump is the only thing of value left on the Damn thing! I'll rebuild the na pump myself (seems like a really straightforward job). As for the drive belt, seems like I should be okay. Can never be too careful with these things. Lose belt or poorly fitted could wipe out all accessories if a belt is thrown or fails.
