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Captain Obvious

Steering Rack Disassembly and Refurb

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I searched high and low for these and even conferred with @Captain Obviousand they were no where to be found.  The ID and OD dimensions are extremely odd and I could not find anything off the shelf that would work. I could get the right OD but the ID was incorrect and vice versa. Adding the grease groove inside made it even more challenging.

I ended up buying an uncut piece of bronze bushing material and had them machined at a local machine shop.  Even with that the new ones do not have the grease groove inside but they do provide a very nice tight fit now.  If you decided to have these machined locally I would be happy to give you the dimensions. 

Also to note, one of the bearings is slightly longer on one side than the other.  Not sure why Nissan did that but that's the way they are.

Mike.

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OK.  I promised to post the dimensions of the end bushings and so here you go.  Before I do, some general info about the bushings first:

1. The bushings are different lengths.  The shorter one goes into the end closest to the pinion.

2. The dimensions are extremely strange.  There seems to be a strange mix of both SAE and metric.  The machinist that made the ones I had machined locally did not believe the measurements that I provided and would only do the job if he could measure both the rack as well as the housing.  In the end my measurements were correct.

3. These are kind of a PITA to remove from the housing.  I tried using a modified blind puller and was successful in getting the shorter ones out on a couple of different racks.  However, I had to cut the other ends out to remove them.  Not difficult, just tedious.

4. My local machinist cut the ID of the bushings so they were very slightly undersized (from the diameter of the rack itself).  This way I was able to hone out the ID to try and match the diameter of the rack and make up for any weaR.

Now to dimensions:

ID - 24.98mm (diameter of rack overall is 25mm)

OD - 1.125 " ( 1 1/8") or 28.55mm

Shorter length - 20mm

Longer length - 28mm

Finally, I will tell you that I looked high and low for these and to no avail.  If you feel compelled to try and find them do not even waste your time at McMaster, ASB (American Sleeve Bearing) or any of the other online sources.  I spent over $100 trying to find these off the shelf and it was a waste.  I did have ASB provide me a quote for a custom one (with the inner grease channel) but it was prohibitively expensive at almost $100 each. 

If there was enough interest I'm sure I could have my local machinist fabricate a a bunch of these at a more reasonable cost, assuming there was enough volume demand.

I've included some pictures of the new bushings.

Let me know if you need anything else.

Mike.

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Great thread, addresses most of what I'm doing.  However, one thing not mentioned is how should the tie-rod end fit in it's socket?   Mine are pretty stiff and feels like there may be some flat spots inside.  Has anyone taken them apart?  The grease seems OK, not all stiff and old.  Should they move freely or is stiff OK?

 

P3011733.JPG

Edited by BDJeff

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Also, there is a hole it the right side of the rack.  Is it for a zerk fitting that's fallen out?  It doesn't seem to have any threads but I'm still cleaning it out.  Is it a "reservoir" item #25 here and if so, does anybody have a picture of what it looks like?

http://www.carpartsmanual.com/datsunS30/DatsunZIndex/Steering/SteeringGear/tabid/1746/Default.aspx

 

 

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Yes they come apart, 30mm wrench if I remember correctly. They need to move but not flop around. The FSM has some specs for them. The 240z has a reservoir that is NLA .

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The FSM also speaks to those holes. I think they are supposed to be filled with a grub screw, but they weren't there on the rack I tore down.

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On 10/8/2017 at 5:41 PM, Captain Obvious said:

Here's a pic of the whole rack exploded. Only thing you can't see is the lower pinion bearing. I pulled it out, cleaned it, and put it back in before I thought to take this shot. And I wasn't going to pull it again just for the camera:
rack29.JPG

Left end parts:
rack30.JPG

Right end parts:
rack31.JPG

Amazing thanks for sharing !!! 

How much grease do you add when assembling the inner tie rod back together ? any pictures of that 🙂 
 

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