yellowcab
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| posted on 1/5/13 at 12:50 PM |
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Play in Sierra rack... anyone experienced it before?
After going out for the first proper drive of the car, it felt very lose, and not planted when driving in a straight line
http://www.youtube.com/watch?v=JhSQGvjZAbo&feature=youtu.be
Noticed I have movement/ play in the column itself
https://www.facebook.com/photo.php?v=10151659993862975&set=o.216873108313&type=2&theater
Anyone know if the insides are adjustable or serviceable?
https://www.facebook.com/photo.php?v=10151660018517975&set=o.216873108313&type=2&theater
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40inches
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| posted on 1/5/13 at 01:03 PM |
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Could be that the preload needs setting, does the preload adjuster have a nut top or the recessed type screw?
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yellowcab
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| posted on 1/5/13 at 01:11 PM |
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Black plastic recessed type screw... Looks around 25mm or there abouts
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40inches
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| posted on 1/5/13 at 01:43 PM |
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I have used a piece of 3mm steel as a big screwdriver in the past, from corner to corner across the hexagon,or a bolt with same size head and 2 nuts.
See if it will screw in, may be tight, if it feels bottomed unscrew completely, there should be a spring and pad underneath, these push the gears into
mesh.
If screwing these down doesn't get rid of the play, rack may be fubared.
A good drawing here
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yellowcab
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| posted on 1/5/13 at 04:43 PM |
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Cheers boss, we had no luck, we knocked up a 21mm allen key but it was tight tight, couldn't move it either way... as it had been peened into
position in three places.
I'll probably end up getting a new pinion & rack to fit into it
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40inches
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| posted on 1/5/13 at 05:03 PM |
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Sorry about that. Just to add to your woes, it has probably been shortened by MK, so you will need to get a new rack shortened. 
Have you tried to dremel the peening out?
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yellowcab
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| posted on 1/5/13 at 05:06 PM |
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To be fair all my efforts were with the rack in situ lol
I'll whip the rack off and have a good look at it on the bench ... Probably after Stoneleigh now lol
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Hellfire
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| posted on 1/5/13 at 07:47 PM |
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Have you tried tightening the pinion retaining nut?
Words and pictures......
 
Sierra Rack
Phil
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yellowcab
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| posted on 1/5/13 at 08:02 PM |
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quote:
Originally posted by Hellfire
Have you tried tightening the pinion retaining nut?
Words and pictures......
Sierra Rack
Phil
Good shout!
Can't say I remember seeing one... I presume it's under the cream plastic thing?
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yellowcab
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| posted on 1/5/13 at 11:38 PM |
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Surprise surprise its back in bits again...
Just nipped down the garage to have a look at the pinion adjustment nut
Whipped the rack off
Bit of a struggle, but managed to undo the pinion adjustment nut
Bearing inside holds the pinion centralised, as the slipper spring holds the tension down onto the rack
No real signs of wear on the teeth of the pinion itself
Nor the rack innards...
So built it all back up again, and its made sod all difference - still loads of play, but only when there is load on it, ie: the car down on the
floor... when in the air, it has no play
I'm thinking the bearing may be shot and needs replacing, as the pinion moves in and out slightly when you go lock to lock, which I'm
pretty sure shouldn't happen...
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40inches
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| posted on 2/5/13 at 07:23 AM |
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Did you get the preload adjuster free, while it was on the bench? It is possible that either the spring has broken, or was not fitted after the rack
was shortened. And you do have a shortened rack by the way.
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yellowcab
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| posted on 2/5/13 at 09:15 AM |
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I knew I should have after I refitted it, but no I didn't get the slipper adjustment freed up annoyingly.
Stupid of me, but it was nearly midnight and I was knackered, shouldn't have started the job.
You're right, the spring could be wrong, snapped, coilbound or even not there!!!
Regarding my rack, I'm not sure, can you tell from the pics?
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MikeRJ
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| posted on 2/5/13 at 11:40 AM |
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Definitely a shortened rack. Is the play definitely within the rack and pinion, or could it simply be worn balljoints on the track rods (or even
track rod ends)?
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yellowcab
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| posted on 2/5/13 at 02:39 PM |
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Problem solved!
Here's the breakdown, kinda difficult to explain.
Removed the rack again, removed the pinion adjuster sleeve, and the circlip and the bearing.
Then removed the plastic 21mm slipper nut, spring and slipper itself.
Not much wear on the Quaife item itself, but all the movement was from in between the bearing and the circlip. I thought when you tighten the pinion
adjustment sleeve up that it'd clamp the bearing nice and tight, it doesn't.
Two ways to cure would be to get a thicker circlip, which would eliminate the play, but it already fills the groove nicely.
So we replaced the bearing just because we could, then put a shim in between the bearing and the circlip which removed all lateral movement.
We followed the Haynes manual in setting it up, but with it being shortened and new innards we took the process principle, but adjusted it by feel.
We put the rack in the car, and put all the steering back on the could adjust the 21mm slipper plug in situ whilst wobbling the steering wheel so
there was next to no movement.
Obviously the tighter you go the more wear on the pinion and rack you will create, it also leads to a heavy steering car. So feels smoother with it
loose, and less gratey but then there is movement.
I've jeopardised the smoothness of the lock to lock transition for a right rack, everyone loves a tight rack, right?
[Edited on 2/5/13 by yellowcab]
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40inches
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| posted on 2/5/13 at 02:55 PM |
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Brilliant! glad you got it sorted 
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yellowcab
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| posted on 2/5/13 at 03:30 PM |
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Cheers Inches...
I must add though, I've not driven it yet lol
So it may all still be Pete Tong! lol
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sebastiaan
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| posted on 2/5/13 at 03:53 PM |
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Don't make it too tight! Self centering was much improved on my car after backing off the preload on the slipper as far as it could without
introducing play. Steering feedback also needs a loose rack.
As always: racks need to be balanced ;-)
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yellowcab
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| posted on 2/5/13 at 06:40 PM |
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Wow what a difference - Sebastianianianian is right... I've now over tightened the slipper slightly, as it no longer self centres, and it makes
it incredibly heavy to turn whilst stationary.
That said - I would sooner drive it like this all day long than have the play... but I will be backing it off as much as I can before introducing play
as Seb said above
Cheers for all your help guys, feel so planted and solid to drive now
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yellowcab
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| posted on 2/5/13 at 06:43 PM |
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No reason whatsoever for these photos, other than the fact I bloody love driving the car in this weather
 
Description
Brakes work... oops!
 
Description
[Edited on 2/5/13 by yellowcab]
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