Power Trac Replacement Engines Suggestions!?!?

[bullitt]

Re: Engines

Major obstacles?

I would say measuring carefully prior to cutting the crankshaft on the brand new engine.

Other than that, you have to buy or make a coupling half at each end, the engine cradle, and I elected to use the PT muffler due to cost and construction. Having lost count of the times I have had the engine in and out, installation is a relative breeze.

Also, the Kohler and Robin engines use different electrical connections. It seems you can swap the white and green wires at the engine connector and use the Robin key switch, but that is a "at your own risk" piece of information. Check it carefully or you may let the smoke out of the electrical parts.

Unless you like this kind of thing, buying the 425 in the first place could be a better option. In retrospect, that would have been a lot less hassle, but sometimes I can't help myself.

And, it is easy to make a 2 into a 7 to complete the important 427 badging. The upgrade to a 427 decal with checkered flags is a cool idea, and may be the next critical upgrade.

bullitt

 

[GarretV]

Re: Engines

I think with the articulation and green color, a Cobra emblem might be in order...

 

[duane]

Re: Engines

Bullit,

Admire your skills. Pictures are a definite. Did you re-use the gear pump mount, or have to fabricate a new one as well. Did PT help, or did you go it alone.

Duane

 

[Schultz]

Re: Engines

Yea, even some painted flames on the hood were the muffler gases exit would be cool.

 

[bullitt]

Re: Engines

duane,

I am not sure if I have skills, if my time is worth nothing, or if I am just a little crazy.

The gear pump mount for the Kohler has a machined recess on the engine side with a larger diameter than the Robin. I thnk it could be reused by machining it a little wider.

To minimize down time, I purchased the parts from PT with the exception of the engine. Except for the inexpensive PT muffler, all parts could have been easily made.

I started to make drawings of the parts with the idea of making a upgrade kit, but once I realized that the crankshaft needs to be cut, I figured the installation to be beyond the resolve of most folks.

PT was mostly helpful with the exception of the engine. They wanted me to also buy that from them, and to support that they would provide no info about the engine, dimensions, spec number, and so forth. This is understandable, but ...

I seem to recall they wanted around $3000 for the 25 hp motor, which is INSANE.

I bought the 27 hp motor locally with the 20 ampere charging system for $1399. However, PT did offer to perform the upgrade at PT for around $2000, but I think they were planning on keeping the 422 parts and motor. I am too far from PT, or I would have taken them up on it.

bullitt

 

[johara1]

Re: Engines

bullitt,
why did you have to cut the crankshaft? dia. or lenght?
/forums/images/graemlins/confused.gif

 

[bullitt]

Re: Engines

johara1

Length. The crank did not extend through the center of the aft lovejoy connector as I expected.

The Robin that came out also had the crank cut by PT prior to installation.

bullitt

 

[bryce]

Re: Engines

I was wondering what you used to cut the crankshaft? Any pictures of before and after? how NERVOUS were you when you started cutting? /forums/images/graemlins/shocked.gif /forums/images/graemlins/cool.gif

 

[bullitt]

Re: Engines

I used the new coupler to scribe a line that was square on the crank at the proper location as determined by careful measurement.

I then took out a pack of hacksaw blades and carefully cut a channel around the crank using the scribe mark as a guide. Then I used the channel as a guide and cut through as I slowly rotated the crank in the correct direction. Once the crank was separated, I removed all ridges with a dremel tool to avoid future cracking. I beveled the edge carefully with a hand file. I THINK the crank is still close to balanced, but 7000 rpm is now out of the question.

This method was more low-tech than I would have liked, but the results looked better than I expected and comparable to the cut on the Robin engine.

I would have prefered to not have had to do this, but had no choice.

No pictures are around at this time, as it is spring and I had Ford 9 inch rear end that needed some attention right after the PT was done, so documentation was not high on the list.

 

[scarg]

Cool- A few years later what is your current status with the 27 HP Kohler? Can we see some pictures now? The crank on my 422 from PT looked like it was hacked off with a chainsaw. I don't think anyone was concerned with balance when they cut mine off. I have a current thread as my 3 year old 422 with 450 hours on it just siezed last week. Any comments would be great.

BR,

Steve

 

[MossRoad]

He hasn't posted since April 2003, so dont expect a quick reply.

 

[Barryh]

Cool- A few years later what is your current status with the 27 HP Kohler? Can we see some pictures now? The crank on my 422 from PT looked like it was hacked off with a chainsaw. I don't think anyone was concerned with balance when they cut mine off. I have a current thread as my 3 year old 422 with 450 hours on it just siezed last week. Any comments would be great.

BR,

Steve

Steve, let me ask you this again, Did you notice any vibrations with your Robin during normal operation?? Thanks Barry

 

[scarg]

Barry,

No - no vibrations and all seemed well.

Steve

 

[Barryh]

Barry,

No - no vibrations and all seemed well.

Steve

Thanks

 

[J_J]

I read this article about a new Deutz turbocharged engine . I thought some of you might be interested.


Deutz has expanded its 1011F series of engines to include the new BF3M1011F, an oil-cooled, turbocharged three-cylinder diesel. The new engine has an output range of 36 to 62 hp, depending on the configuration, and is designed to provide the power of a larger engine in a smaller envelope. The 2.2 L engine has a bore and stroke of 3.6 x 4.4 in. and a compression ratio of 17.5:1. Maximum torque output is 135 ft.lb. at 1800 rpm.

 

[RegL]

I read this article about a new Deutz turbocharged engine . I thought some of you might be interested.


Deutz has expanded its 1011F series of engines to include the new BF3M1011F, an oil-cooled, turbocharged three-cylinder diesel. The new engine has an output range of 36 to 62 hp, depending on the configuration, and is designed to provide the power of a larger engine in a smaller envelope. The 2.2 L engine has a bore and stroke of 3.6 x 4.4 in. and a compression ratio of 17.5:1. Maximum torque output is 135 ft.lb. at 1800 rpm.

One of those would git my 1430 up the hill. JJ, was that a recent article? I thought I read that Deutz replaced the 1011F series with 2011F.

 

[woodlandfarms]

I do think of turbocharging my PT, but I have to wonder what heat issues would arise... Also, could the Deutz engine still be rated at 45 degrees with a Turbo....

Carl

 

[J_J]

One of those would git my 1430 up the hill. JJ, was that a recent article? I thought I read that Deutz replaced the 1011F series with 2011F.

You are right, that is old news. Sorry.

 

[SpringHollow]

The rebuilt one that was for sale on E-bay recently was I believe 79 HP. Pistons were cooled by an oil spray. So far, I have not been engine limited. How about you, Carl?

I have been limited by lift capacity many times recently. I have had 3 tractors with different lift capacities: 800 lbs, 2000 lbs, and now 1200 lbs. It hurts to go "backwards". 3000 lbs would be nice. Work sold an outdoor forklift that only had a few hundred hours on it but was 30 years old. A friend heard about it and turned it down and did not think to ask me. It sold for $600. If he wasn't such a good friend he might be an ex-friend!!!

Ken

 

[woodlandfarms]

On my steepest incline that I normally traverse (25 degrees) I bog a bit at the top (300 feet long slope). As any normal person I want more power. I totally agree with Ken, the engine is enough, but the front end lift is really a shame. As my piston rod on my tilt has a slight bend in it, I plan to order all new cylinders for the front, upgrading them by a quarter or half inch...


Carl