[TR] Overdrive issues

[ptegler]

the bypass valve spring can be replaced/shimmed to adjust pressure as 
needed.

ptegler


On 6/10/2016 9:04 PM, hdrider570 at att.net wrote:
> When I had this problem with a J type OD, it was wear in the pump 
> piston/bore.  This pump uses no seals so I expect that your mechanics 
> are talking about the accumulator piston(s).  Basically when the 
> piston/bore wears the clearances increase which allows oil to bypass 
> the piston resulting in lower pressure.  One thing that I noticed was 
> that the slippage was more pronounced once the OD warmed up thus 
> reducing the viscosity of the oil.
>
> I expect that a worn drive pin in the piston could cause a similar 
> problem by shortening the piston sweep.
>
> Bottom line is if you are not getting enough oil pressure, it is a 
> hydraulic problem which is either not enough supply (pump wear?) or 
> excessive losses somewhere such as bad piston seals etc.
>
> Edward Hamer
> Petaluma CA
>
>
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-- 
Paul Tegler ptegler at verizon.net www.teglerizer.com
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