[AT] Questions on a 1975? Allis 7030 and 7050

[Cecil Bearden]

2200 RPM is the top RPM of an inline diesel.  Inline engines were built 
for torque, not speed.   I think part of the problem was the mechanical 
pumps.  at high speeds the fuel in the injector lines sets up waves and 
misfire resulting in bent rods, burned pistons, etc.  HEUI helped to 
solve that.    That 426 engine is a great engine in the 7030, at 136 hp...
Cecil

On 7/10/2021 5:45 PM, magreer67 wrote:
> Ditto that on the AC 8070. My brother in law has one and the 426 in it 
> was a problem child engine. He repowered it with an 8.3 Cummins and 
> now it has plenty of power and is finally reliable.
> Mark Greer
>
>
>
> Sent from my Verizon, Samsung Galaxy smartphone
>
>
> -------- Original message --------
> From: Cecil Bearden <crbearden at copper.net>
> Date: 7/10/21 9:23 AM (GMT-05:00)
> To: at at lists.antique-tractor.com
> Subject: Re: [AT] Questions on a 1975? Allis 7030 and 7050
>
> Steve:
>
> I noticed that and it is the same tractor up to 200 hp with turning up 
> to 2550 rpm and the intercooling.  The 8070 gave Allis a bad name as 
> the engines were coming apart at the higher RPM around here..
> Cecil
>
>
> On 7/10/2021 5:17 AM, Stephen Offiler wrote:
>> I know nothing about these tractors, Cecil, but got curious enough to 
>> check Tractordata.  The 7030 is listed as turbocharged while the 7050 
>> is listed as turbocharged and intercooled.  Looks like they turned up 
>> the turbo boost.
>>
>> SO
>>
>>
>> On Fri, Jul 9, 2021 at 6:58 PM Cecil Bearden <crbearden at copper.net 
>> <mailto:crbearden at copper.net>> wrote:
>>
>>     Just a note, the 7060 is the same tractor, but shows 192hp..
>>
>>     Cecil
>>
>>     On 7/9/2021 4:40 PM, Cecil Bearden wrote:
>>>
>>>     I have a 7030 Allis that needs a power director clutch seal even
>>>     though it still runs and pulls.  A friend has found a 7050 of
>>>     about the same year. Tractor date shows the 7050 having 156+Hp
>>>     and the 7030 130+/- hp.  The engine is the same 426 cu in
>>>     engine. Both engines are turning the same 2300 rpm.  Did they
>>>     turn the pump up?  My old 7030 will leave a smoke plume that can
>>>     be seen 5 miles away!!!  Maybe the pump was turned up on it.  I
>>>     think I might get the 7050 and just switch some tires & wheels. 
>>>     That 426 engine os a real stump puller.  I wish I could put it
>>>     in a truck somehow...
>>>
>>>     Cecil
>>>
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