Trouble with those leg pullers mixed with hydraulic ram is you can be putting likes of 10tonne load on small contact foot area .
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@johnny gtir wrote:Sounds like one of the previous fails has twisted them and the builder has forced the par ones on and it's got worse but I could be wrong
Last edited by Cosmic73 on 15th June 2016, 3:47 pm; edited 4 times in total
Last edited by Cosmic73 on 15th June 2016, 3:50 pm; edited 1 time in total
@Mr B wrote:I have straight set with standard final & no issues so far in over 2 years & 2 boxes I done with the par kit, straightcut final is recommended & they advised that to me for drag and high torque . they do a lot of gearkits wiith straightcut & helical final retained so would of thought they done plenty modeling & testing on it .
PPG do same on their straightcut syncro & straightcut dog drag box which retains standard final drive unless order it as an addition .
The final drive gear is part of the mainshaft so axial load goes direct to the rear shaft bearing & if shaft been setup with correct preload it will not have any shaft shuttling & deflection is down to box rigidity.
I use resin & plate end casing brace as still retain the helical drive which loading bearing area heavily .
I would be more inclined think mainshaft preload set well off or not even checked when built & float caused alignment issue with hubs & the failure. Hard to be conclusive without seeing it fully stripped & not knowing what floats & preloads seemed like prior to strip down .
If he needs new shaft it would be good to go for new par final drive to be more bullet proof .
Hopefully the gear splines are not damaged, shaft is softer so favorable chance they reusable .
Part of reason why you don't want reduce preloads to much in track use is because force and deflection has more end result in shaft axial bearing setup than what additional heat & expansion does unless on full straightcut kit .
Last edited by Cosmic73 on 17th June 2016, 8:35 pm; edited 4 times in total
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