Jeep Wrangler Forum banner

Help with hydro-assist install

10K views 5 replies 3 participants last post by  sewman  
#1 ·
I've been slowly working on installing a hydro-assist kit on my TJ, after replacing the steering box. It's a PSC steering gearbox with PSC piston and Mr. Blaine's mounting kit.

Now that everything's installed, I'm not actually sure which side of the piston is supposed to go to which output on the steering gearbox. From a different forum someone mentioned the front output is the left turn port, and the rear is the right turn port. Is there documentation confirming this, or at least someone who's run the same SG400R steering gears?

Finally, there's a lot of play around the shaft end that connect to my tie rod, am I just supposed to torque the heck out of that bolt, bending the bracket and clamping down on it? Or should I find some bushings to install on each side, so it's nice an centered in the bracket?

Once the pictures I take on my phone make it to the cloud, I'll post them to help out.

Thanks for the help everyone!
 
Discussion starter · #2 ·
4429824
4429827
4429828

The first picture shows the steering box with the 2 (covered) outputs, the second shows the (covered) inputs on the piston, and the third shows the fitment, where I think some bushings are required.

Thanks again for the help everyone. The complete lack of instructions from PCS or Black Magic has be scratching my head a bit. But Mr. Blaine has been nothing but helpful over the phone, which I cannot say the same about PSC. A lot of time his instructions are a little over my head, and I'm sure he thinks I'm a complete idiot.
 
Discussion starter · #3 ·
4429829

Well, I chopped up one of the PSC weld tabs that came with the piston, and made it into a washer/bushing. Fit like a glove to snug down the rod-end. Unless Mr. Blaine or someone says otherwise, this is how I'll plan on running it.

Next and last step is to run the pluming. I guess I can just send it, and if it's backwards, then I'll swap the lines. Would like to avoid having to re-bleed the system again. But that might be quicker than finding someone who's done this before.

Once I get everything up and running I'll put it into a new, nice write up. Doubt too many people are doing this on TJs, given their age. But who knows, maybe it'll help someone out. I would be interested to know how many of these kits Mr. Blaine has sold, given the niche application of them - can't be too many people running PSC pistons on Currie linkage.
 
Discussion starter · #4 ·
4429834

Well, got the hydraulic cylinder plumed. 50/50 change of getting it right... and I did it wrong the first time. Pretty obvious as soon as I tried to turn the wheel you could feel the Jeep (on jack stands bind up and start to shake). It wasn't too hard to swap the connections though, and now it's all functioning. Not too surprised in the lack of replies. I think the TJ knowledge base is getting smaller by the day.

Insane difference in handling. Took it out for a ride through the city and on the freeway. The wheel turns so easily, it feels like it's up on jacks, while driving around.

Anyway, I still have to replace the normal high pressure line to the steering box from the pump, since I kinked the OEM one a little, while installing the box. I'm currently running prestone power steering fluid as well, and need to flush and replace it with Sweepco that I've got sitting in the garage. Replacing the line and fluid should be a pretty simple job that I'll take care of tomorrow.

Other small issues is that the steering wheel is a little off center, and the Jeep seems to be pulling to the left a bit. I'll center up the steering wheel tomorrow, and confirm that it's pulling (ever so slightly). If it is, I suspect the fix is to move the bracket up my drag link a hair, so the cylinder is in the exact middle of the stroke while the wheel is centered. But it'll be easier to do all that once I actually get the wheel centered.

Overall very happy with the project. Just wish there had been a little more documentation from the beginning. And I wish PSC was an easier company to work with. Their customer support is absolute garbage, and the two or three times I called, they couldn't have been any less helpful.

Like I said, I'll make a new thread with all the details and more pictures from the beginning to end.