Cat 12 Grader Pony Start

Starting a Pony Start Cat 12 grader

[@zenjamin6262]

Man am I glad I found this I've been hill starting mine !

[@popmccoy3454]

Gawd, that brings back wonderful memories. Thank you mate.😊👍

[@ericmaldonado1373]

Great motor grader ... what a wonderful engineering 👏

[@randyrichter6773]

Great video Darren! That looks like it will work for many more years.

[@dedreman2227]

What a process. We’re so spoiled now am days.

[@ClintsHobbiesDIY]

Great detail on how to. Thanks.

[@davidmcd8400]

Nice video . Only one thing scares me . Seriously be absolutely certain the transmission is in neutral . You are knocking on deaths door where you are standing .

[@dakotak8437]

Not being rude I got a 1950 cat d4 6u dozer in the winter just let the pony motor run the Diesel engine with compression closed for 20 30mins depending how cold then open the fuel and she will start right up with out any either but starting up the pony slowly close the compression but very nice grader tho

[@darreneaton3046]

no worries about rude, thanks for your dialog. I simply did not use my compression release, been using either for decades with no ill affects that i know of. thanks again!

[@tttco]

Great video thanks for posting

[@jamielacourse7578]

Thank you for explaining everything. That is seriously lacking on the 'Tube.

[@kenp3L]

2:25 "...and then preset my diesel fuel for startup..." Not to be rude, but isn't it a better practice to start the pony motor with the main engine set to compression release and starved for fuel. Then, once the main engine has oil pressure and has warmed up a bit, to shut off the compression release, then to introduce diesel fuel?

[@darreneaton3046]

Not rude good idea especially cold days

[@darreneaton3046]

yes if this is best or easiest

[@mog5858]

great video. keep up the good work and have fun with your CAT.

[@jbj27406]

You didn't mention a compression release on the diesel. I assume you have one and did use it since you seemed to be handling two levers when you engaged the pony motor to the diesel. Your diesel starts right up, but it seems that most people let the diesel turn a while with the compression release employed to warm the diesel and make it start gently. Great video.

[@jbj27406]

I went to your home page hoping to see some grading. I wish you would show the Cat 12 in use. Thank you.

[@MichaelBulgin]

Hello sir, I have recently acquired the same model of machine it runs and your pony motor start video was very helpful thank u , do u have a operating instruction guide video possibly or know of one that u would recommend? Thank you

[@ゴルゴ榎本]

okinawa de tonarino ojisannga onagimonowo unntenn sit ite gasorin ennginn de sidousuru kono kikaigaga sukidesita.

[@edmilsonduarte2659]

Parabéns pelo vídeo amigo, sonho ter uma motoniveladora caterpillar mecânica, mas, no país que moro, é muito difícil de comprar maquinário. Forte abraço amigo

[@jimmyD5085]

So has to run rich after Pony motor is fully warmed up.

[@nathank7239]

Do not give it Ether! Also let the Diesel Build oil pressure before giving it Fuel and Compression. Than Close The decompression and and let the engine Warm up Before giving it fuel.

[@jimmychanbers2424]

I used to stop and start an old a-jax one lunger oil pump jack. We used gas,then propane then to natural gas. It was wild spinning that big wheel.

[@kennydean4512]

I used to start a Cat D69U the same way, one question though, you dont open the compression release? I would have to release the compression release then as the Diesel engine would start puffing out smoke, I would engage the compression release.

[@darreneaton3046]

Good, best practice, mine was already warm but even then would be fine

[@johnsummers172]

If you ever need ether in the diesel you are doing something wrong. Daddy had an RD-8 and the starting sequence goes like this. Start the pony, ours was a crank handle. Let it warm up, 3-4 up to 10-15 minutes depending on temp. Very cold weather, half a tank of gas. Doing this you are warming the coolant shared by both engines. Next put pony in low, it was a two speed some were single, and start the main turning over. This is pulling warm air from the pony exhaust that is heating the intake manifold internally into the main cylinders. After a few minutes, again time varies by temp, put the pony in high and throw compression lever to half. Now watch for the temp gauge to start to move. Once you get a little temp in the water jacket, throw compression to full and put the fuel to it. If it doesn't start after 2 revolutions, shut the fuel off and let it warm up some more. If you try any and start it before it's ready, you're just dumping raw fuel into the cylinders washing the lube oil off the cylinder walls and causing extreme wear and diluting the lube oil. NEVER use ether. Starting at 20 below takes a couple tanks of gas but no ether. Hope this helps. Please feel free to ask me questions. I loved that old Cat with it's LeTourneau pan.

[@Browndogdiesel]

Not to be rude mate but why do you say never use ether? I know you’ve provided and example of how to do it without but why? Not trying to be rude I’m just genuinely curious. In some cases it is necessary, I have worked for people who refuse to repair their machinery and the only way to start is with ether I’ve heard many people say never to use it but never a reason as to why.

[@johnsummers172]

@@Browndogdiesel either washes the lube oil off the cylinder walls and also can bend a rod on higher compression engines by igniting to early. I have used gasoline on a rag held at the air intake on some modern truck engines that didn't have a primer pump to get the air out of the injector lines, but that's taking a real chance too

[@dakotak8437]

@@Browndogdiesel it also eats rings and pistions and cylinders and will start burning motor oil and have a runaway engine if you don't have a compression release and why they have to use either to start bc they never want to fix there things is bc it's super expensive to repair and bc it won't start any othere way with out help

[@earlborchardt4358]

@@johnsummers172 Either when used properly doesn't hurt a thing. You can pour gas into it all day and it will not fire, soak a rag with it and put over the intake and BINGO she starts.Be careful you guard against letting the rag get sucked into the intake, that makes for a sad story, don't ask me how I know this. I'm 80 years old and my old man taught me this trick when I was just a pup

[@johnsummers172]

@@earlborchardt4358 I'm only 60 and Dad lived to be 95 my point is that if those old cats were any kind of shape they don't need either. Find an old owners manual all read the starting procedure for pony started engines

[@ericlakota6512]

I use a dryer exaust tube put oner pony and plow exaust on fuil rail in real cold if i must start big engin works realy well

[@haroldgrzywa2445]

I would build fuel& oil presure then hit compresion releaf

[@clearlake2369]

Thank you for the wonderful clear video! What a nice old grader you have with the pony start! Where did you film the grader start? It looks to be the foothills somewhere out west.

[@darreneaton3046]

foothills California, near Yosemite

[@Scribles]

nice

[@kauffmansonexcavating452]

What is the lever right above the button for the electric push start

[@skyking6989]

How long does the pony motor need to run to get everything warmed up?

[@johngranata5515]

i was taught to let it turn over till oil pressure comes up then start . who knows

[@darreneaton3046]

Anyone know where can I buy brakes (shoes, cylinders, shoe springs) for this model 8T7290, 1955, driveline brake also?

[@ghilreese3413]

Does the starter engine run the exhaust through the big engine and warm it? Thanks for the video.

[@darreneaton3046]

No, but the diesel starts and warms quick even in the 20’s

[@johnsummers172]

the pony exhaust runs through the diesel air intake manifold

[@darreneaton3046]

No separate exhaust

[@rachelmarkowski7514]

Long live the D318

[@darreneaton3046]

Pictures?

[@no1dirtbag]

I got the same name just spelled Darrin. Also have the same engine but in a D6

[@darreneaton3046]

nice name! I spent a few years on D6 erosion control and logging, get a lot done with em good size work horse

[@oodypatofficial140]

Way back in to 70s

[@flasher1663]

Using a starter motor is cheating you should use the hand crank, it will give you manly arms

[@dirtdigger2110]

What is the lever above the ignition and starter button? Compression release?

[@darreneaton3046]

dirtdigger2110 yes

[@darreneaton3046]

Yep

[@Boot_185]

Is that pony a 2 stroke?

[@darreneaton3046]

No it’s a 4 stroke

[@darreneaton3046]

sorry for lagging reply, no the pone is 4 stroke

[@MsJinkerson]

I thought it was hard to do it's that easy

[@darreneaton3046]

really is simple but heads up avoid flooding the pony

[@Nyth63]

Aack! It is NOT a 'pony' motor. Caterpillar NEVER called it that. The correct term is 'starting engine'. Please stop using that other word. It hurts the ears.

[@woodhonky3890]

"starting ending" ?

[@Nyth63]

@@woodhonky3890 sorry, fixed.

[@DaveyCrockett001]

It's not a pony doorknob. It's a pup.

[@Vance_Nickerson]

It's a pony over here across the pond.