Hvytrkmech

Just when I thought I heard it all.

1-5-3-6-2-4

I'm partial to MTU, we're an MTU dealer. I love working on the big iron.

Hvytrkmech

How are they, never touched one.

1-5-3-6-2-4

this power house at the new hospital here has 10 - 20v4000 MTUs. all diesel. for 25.5 mega watts production capability. our sale and service contract



there is a transformer being built right now so we can actually load test them to full power. they are 13800 volt we need them kicked down to 600volt to load test.


precommisioning.


Mmmmm whats rattling........


OH there it is......

Hvytrkmech

LOL, I seen those before. Must be nice not having to flip a hood?

1-5-3-6-2-4

this is how you torque mains on an MTU series 4000............

stretch the stud aprox 2mm with 13-15,000psi hydraulics spin on main "nut" by hand. measure retraction. call it a day.






head bolts we use a hydraulic torque wrench too.

Hvytrkmech

Nice! No oil dripping on you while adding extensions to go 205+90* all while having the wheels on it.

1-5-3-6-2-4

weeeell imagine doing this overhead while dripping oil aaaallll over you after doing a bearing roll in a frac pump........at least the dial bracket has magnets

Meet Mr frac trailer...... theres thousands of these babies running around alberta for the various well service companies.

Hvytrkmech

You got me, that looks like it would suck completely. Accessible from the bottom of the trailer, or do you have to dismount and lift it?

1-5-3-6-2-4

oh no, crawl under there. drop the 300lb oil pan. and look up

Hvytrkmech

That sounds Delicious and heavy. I let mine drain for 24hr, but I have the luxury to be picky. I do not envy you. Glad it is not my full time job any more, although i do miss it at times, crazy as that may sound.

got_soot

That is really cool!!! Never in my life have i had to use a hydraulic torque wrench.

Raspy

Measuring bolt stretch is the most accurate way to get the right clamping force. The thread friction or nut face friction don't get included in the torque value and an innacurate torque wrench is not an issue. Cool.

1-5-3-6-2-4

I dunno about cummins being "the" best. they got a solid track record for sure. but the german engineering is pretty dang hard to beat.

and talking about hydraulic. pulling the front hub on a MTU 2000 series yesterday. you're applying 35,000-43,000 psi to expand the hub. to release from the crank. no heating or cooling. the hub actually has a hydraulic port on the front, with drillings internally and a channel to the crank surface. at 35,000+ psi the fluid literally forced between the hub and crank pops it off. then you can wham bam the front seal.

wcbcruzer

Cummins is a more heavy duty engine. Cummins is, and always has been, ahead of the game. Cummins engineering is based on a solid understanding of how a diesel works, not just "can we get this new motor to last 100k miles." As an example... Cummins met the 2010 EPA emissions requirements 3 years ago. Chevy and Ford struggled to meet the requirement and finally resorted to using DEF. Cummins is offered as an "upgrade" over the Powerstroke in F650 and up medium-duty trucks. Cummins has bigger connecting rods. Cummins is an inline-6, which is the best configuration for engine balance. Cummins is an inline-6, which is what all the big rigs use.

Having said all that, I don't think the new Duramax engines are all that bad. Just depends on what you want out of a vehicle.