Need knuckle alignment tool (1 Viewer)
- Thread starter woytovich
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fullthrottle
SILVER Star
Out of interest, without the SST, how did you determine no shims were required on the bottom and you just packed out the top to achieve the correct preload. I see @cruiseroutfit mentioned a 0.5mm for the bottom.
My eye-ometer is good, but maybe not 0.5mm good
Out of interest, without the SST, how did you determine no shims were required on the bottom and you just packed out the top to achieve the correct preload. I see @cruiseroutfit mentioned a 0.5mm for the bottom.
My eye-ometer is good, but maybe not 0.5mm good
For clarity, in absence of an SST or the ability to use one, we recommend 0.5mm shim on bottom (very easy to measure with a caliper or micrometer) and then shim the remaining on top unit preload spec is achieved. Interestingly, the 1990+ leaf sprung 7x EPC and FSM don't show a lower shim in diagrams BUT does call out using the SST (SST 09634-60013) to set the lower and upper shim thickness. I've not researched this super in depth. There is an Aussie company reproducing the 60013 variant of the SST and I believe it comes with the adapter sleeve to use in the larger seal OD (50mm vs 44mm). I believe our tech/parts engineer built his own sleeve for in-shop builds.
As for how to determine they are only needed on top versus bottom sans SST, I have no clue how that can work. Mark will have to enlighten us there.
fjc-man
SILVER Star
I have the 09634-60013 set and the additional larger sleeve OD is 40mm. Does anyone have an ID measurement or spec for a 70 series axle?
- Thread starter
- #25
I tried a 5mm shim (on the top probably and it was way too loose. I dropped down to a 2mm and it tested right on spec. Maybe I should have done all of that on the bottom... (I hope doing that on the bottom wasn't a tragic mistake)
So @cruiseroutfit ... (and this is a real question)... in the real world what will likely be the consequence of putting 2mm on top vs on the bottom? Is that likely enough to cause a leak?
So @cruiseroutfit ... (and this is a real question)... in the real world what will likely be the consequence of putting 2mm on top vs on the bottom? Is that likely enough to cause a leak?
- Thread starter
- #26
Trial and error... Fish scale as per the FSM method and spec.Out of interest, without the SST, how did you determine no shims were required on the bottom and you just packed out the top to achieve the correct preload. I see @cruiseroutfit mentioned a 0.5mm for the bottom.
My eye-ometer is good, but maybe not 0.5mm good
It depends on the year. The 7x used the 44 - 33 - 8 (mm) seal to 1990 and then the 50 - 35 - 9.5 seal afterwards.
Are you sure it was 2.0 mm and 5.0 mm shims and not 0.2mm and 0.5mm shims? Very different numbers. I've never seen 2.0 and 5.0 mm shims. That would have to be a stack of shims, not a single.
The issue with not being centered is inner axle seal wear over time. Are you running drive flanges or free-wheel hubs?
Let's assume you needed 2.0 mm to get the preload. The centering tool helps you identify where to put that thickness. For example it may be .5mm on the bottom and 1.5mm on top to have the knuckle/spindle centered with the axle housing so the inner isn't rubbing hard on the seal.
fjc-man
SILVER Star
Kurt, so a 44mm OD sleeve up to 1990 and a 55mm for 1990 and up, used slipped over the tool scribe base holder? The scribe holder is above the seal installer in the picture with the 40mm sleeve on the scribe holder.
- Thread starter
- #30
Yes... .2mm
- Thread starter
- #31
I recently did a complete knuckle rebuild on my LJ78 and had read that it is acceptable to simply reuse the original shims in their original locations, but now I am second guessing that. Is that only the case if one reuses the knuckle bearings, or would it be acceptable with new bearings?
That is the standard FSM procedure and if it yields correct pre-load values, I'd be comfortable with that on a vehicle equipped with free-wheel hubs.
Fortunately the inner axle is stagnant when sitting. If is slightly mis-aligned, it won't be an issue. If it's off by 1mm+, it may weep.
I'm not sure what you're asking. The seal OD/ID/width are listed in my previous post. We use the 60014 variant SST with a sleeve that I believe our tech made for the 50 - 35 - 9.5 seals (90310-35010)
fjc-man
SILVER Star
The 50mm sleeve your tech had made is used with the tool set to compensate for the larger diameter ID of the 1990 and up 70 series, right?
Correct. He's out this week or I would ask.
