Title: What yr did cat come out with the power shift?
Post by: Harvey Havens on December 18, 2002, 08:20:40 PM
Post by: Harvey Havens on December 18, 2002, 08:20:40 PM
What yr did cat come out with the power shift some say that it was in 55 but i dont think so i think it was in the early 60,s i,m in a big aurgument with a cat man i,m a cletrac man my self i think A C had it in the 50,s please let me know thanks H H
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Post by: thecatskinner on December 19, 2002, 01:18:29 AM
Post by: thecatskinner on December 19, 2002, 01:18:29 AM
Harvey--my Cat books are at the office, I'll try to take a look tomorrow.
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Post by: Blake Malkamaki on December 19, 2002, 04:10:22 AM
Post by: Blake Malkamaki on December 19, 2002, 04:10:22 AM
I don't know the answer to this, but I know Cat had some pretty primitive stuff even in the 50s.
I believe Cletrac/Oliver came out with their power shift in the late 50s on the OC-9/96. There was an OC-12 with power shift in the works, but it never went into production. There are a few around though.
I believe Cletrac/Oliver came out with their power shift in the late 50s on the OC-9/96. There was an OC-12 with power shift in the works, but it never went into production. There are a few around though.
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Post by: thecatskinner on December 19, 2002, 10:33:38 PM
Post by: thecatskinner on December 19, 2002, 10:33:38 PM
It looks like 1960.
The first ones I see are 955H 60A series and the 977H 53A series both in 1960.
It was then phased in over a number of years into dozers and then pretty much across the line.
There was a torque converter transmission that proceeded that which came out in about 1955.
Not that I want to date myself here, but when I got out of the service in 1965 I worked in a rock quarry. I operated a CAT dozer stripping top soil, cable blade over the top, manual transmission w/o reverser. At idle I could watch the timing marks go past on the flywheel.
A day on that beast was no walk in the park
:o:(:(
The first ones I see are 955H 60A series and the 977H 53A series both in 1960.
It was then phased in over a number of years into dozers and then pretty much across the line.
There was a torque converter transmission that proceeded that which came out in about 1955.
Not that I want to date myself here, but when I got out of the service in 1965 I worked in a rock quarry. I operated a CAT dozer stripping top soil, cable blade over the top, manual transmission w/o reverser. At idle I could watch the timing marks go past on the flywheel.
A day on that beast was no walk in the park
:o:(:(
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Post by: thecatskinner on December 20, 2002, 12:23:25 AM
Post by: thecatskinner on December 20, 2002, 12:23:25 AM
Harvey, after posting the above I reread your post. I suspect your "friend" is confusing the torque converter transmission with the power shift.
I think that was pretty short lived--I have never seen one and I spent a lot of time riding on Cats.
I think that was pretty short lived--I have never seen one and I spent a lot of time riding on Cats.
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Post by: Blake Malkamaki on December 20, 2002, 07:44:41 AM
Post by: Blake Malkamaki on December 20, 2002, 07:44:41 AM
I think most power shifts have torque converters.
I know Cat used regular transmissions in their dozers for years after 1960. Can you still buy a Cat without power shift? For farm work and pulling, they are much more efficient than power shift.
I know Cat used regular transmissions in their dozers for years after 1960. Can you still buy a Cat without power shift? For farm work and pulling, they are much more efficient than power shift.
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Post by: thecatskinner on December 20, 2002, 02:20:03 PM
Post by: thecatskinner on December 20, 2002, 02:20:03 PM
Blake, the transmission I'm calling a torque converter was Cat's term and designated "TC".
It was introduced in 1955 in the D8D,15A and the D9D, 19A.
I see no reference to it after 1960.
As far as I know direct drives are still available.
In general don't look to Cat for innovation, in fact it is part of their corporate strategy not to be innovative.
Their philosophy, which has worked well for them, is to allow others to introduce new "things", work the bugs out, develop market acceptance and then jump in with a "better" mouse trap.
You need look no further than excavators to see this played out. Koering had that market in their pocket until Cat came out with the first 225---now Koering doesn't even have a pocket:o:(:(
It was introduced in 1955 in the D8D,15A and the D9D, 19A.
I see no reference to it after 1960.
As far as I know direct drives are still available.
In general don't look to Cat for innovation, in fact it is part of their corporate strategy not to be innovative.
Their philosophy, which has worked well for them, is to allow others to introduce new "things", work the bugs out, develop market acceptance and then jump in with a "better" mouse trap.
You need look no further than excavators to see this played out. Koering had that market in their pocket until Cat came out with the first 225---now Koering doesn't even have a pocket:o:(:(
Title: Power shift
Post by: Harvey Havens on December 20, 2002, 08:33:22 PM
Post by: Harvey Havens on December 20, 2002, 08:33:22 PM
Thank,s guy,s for being so helpful that is the machine my friend has is a 955 H 60A the sn# is 2606 does anyone know what yr it is thank,s Harvey
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Post by: thecatskinner on December 20, 2002, 09:55:28 PM
Post by: thecatskinner on December 20, 2002, 09:55:28 PM
Harvey, I don't have a serial number list but the 60A series was made from 1960-1966.
Title: Powershift Transmissions.
Post by: Deas Plant on January 26, 2003, 09:31:11 PM
Post by: Deas Plant on January 26, 2003, 09:31:11 PM
Hi, Folks.
I saw my first Powershift transmission in 1961 on a Cat D9D at Wigmores, the then Cat distributor in Perth, Western Australia.
AC had torque convertor-equipped machines before that but did not bring out their first powershift until several years after Cat. Cat. also torque convertor-equipped machines prior to releasing the Powershift transmission and kept many of those models for some years after introducing Powershift but they lost pretty much any popularity they had once people saw what a huge improvement Powershift was.
IH also brought out their first Powershift versions at around the same time as AC. I don't recollect ever seeing a torque convertor-equipped IH machine.
NOT all 'powershifts' had torque convertors. Fiat of Italy brought out their early 'powershift' (No capital 'P' because it was only a capital flop.) transmissions in the mid-60's. They were not however a true powershift but a hydraulically controlled direct drive. When you selected a gear, the transmission hydraulically disengaged the master clutch, selected the direction and speed that you had chosen and hydraulically re-engaged the master clutch. When you were working, there was a two-second delay before engaging the next selected gear, the theory being that the tractor would have come to a stop before the next gear was engaged. Depending on conditions, sometimes that happened and sometimes it didn't.
This early Fiat attempt at a powershift transmission was a real dog of thing to try to do anything delicate with, including loading or unloading the machine onto or off a float or lowboy because the transmission was either 'Clunk' in or 'Clunk' out. You could control the engine revs but you COULD NOT 'feather' the transmission. NOT very user-friendly.
As I recollect, Case never had a Powershift transmission in that sense in their crawler range, but I am open to correction here. They had the Terramatic transmission and steering system with forward and reverse as well as high and low for each track. This was a very good system as systems went, quite easy to use once you got used to the way the controls worked and the feeling of sitting there 'playing with your testicles' all day. There were four small levers to control the transmission and steering and all were situated between the operator's legs immediately in front of the seat, almost right in front of the operator's crutch. The biggest problem with this transmission was the standard Case one of under-engineering.
Hope this helps some people.
You all have a wonderful day.
Best wishes.
Deas Plant.
I saw my first Powershift transmission in 1961 on a Cat D9D at Wigmores, the then Cat distributor in Perth, Western Australia.
AC had torque convertor-equipped machines before that but did not bring out their first powershift until several years after Cat. Cat. also torque convertor-equipped machines prior to releasing the Powershift transmission and kept many of those models for some years after introducing Powershift but they lost pretty much any popularity they had once people saw what a huge improvement Powershift was.
IH also brought out their first Powershift versions at around the same time as AC. I don't recollect ever seeing a torque convertor-equipped IH machine.
NOT all 'powershifts' had torque convertors. Fiat of Italy brought out their early 'powershift' (No capital 'P' because it was only a capital flop.) transmissions in the mid-60's. They were not however a true powershift but a hydraulically controlled direct drive. When you selected a gear, the transmission hydraulically disengaged the master clutch, selected the direction and speed that you had chosen and hydraulically re-engaged the master clutch. When you were working, there was a two-second delay before engaging the next selected gear, the theory being that the tractor would have come to a stop before the next gear was engaged. Depending on conditions, sometimes that happened and sometimes it didn't.
This early Fiat attempt at a powershift transmission was a real dog of thing to try to do anything delicate with, including loading or unloading the machine onto or off a float or lowboy because the transmission was either 'Clunk' in or 'Clunk' out. You could control the engine revs but you COULD NOT 'feather' the transmission. NOT very user-friendly.
As I recollect, Case never had a Powershift transmission in that sense in their crawler range, but I am open to correction here. They had the Terramatic transmission and steering system with forward and reverse as well as high and low for each track. This was a very good system as systems went, quite easy to use once you got used to the way the controls worked and the feeling of sitting there 'playing with your testicles' all day. There were four small levers to control the transmission and steering and all were situated between the operator's legs immediately in front of the seat, almost right in front of the operator's crutch. The biggest problem with this transmission was the standard Case one of under-engineering.
Hope this helps some people.
You all have a wonderful day.
Best wishes.
Deas Plant.