Hatz 1B30 engines

[LocomotiveBreath]

I'm always looking for engines, thought I'd show you these.

See: http://tinyurl.com/yfny3p

[Stuart]

My, that look's mighty familiar I'm told it's old now and has been superceded by some of the Lombardini models. But, if it 'ain't broke why fix it That must be the thinking at Hatz I reckon.
It hasn't let me down in any major way so I've gotta say it's ok. Interesting to see it in its original guise with the exhaust coming out the top instead of the side and what looks like the red oil dip stick P clipped up nect to the metal injector pipe and rubber drip back pipe.
Pushing that drip back pipe on the top of the injector is real fiddly. Not much room in there at all and the rubber pipe they chose to use has way to thin a wall for my liking. Had one go on me before now and they are awkward to replace (when you're on the road).

[balboa_71]

Hey you all,
Now that we have a pretty picture of the Hatz, I have some questions:
Why do they (and others) extend a very large diameter part of the crank well away from the crankcase? If that picture was one of a Hatz (or some other diesel single, perhaps a Chinese clone of a Yanmar) with a straight 1" diameter crankshaft, there is a 1-5/16" diameter that cannot be used. This lenght is around 5/8" and of no use. Would you not want to get your clutch, pully or sprocket right up against the crankcase so you are not putting such a stress on the PTO bearing?????

Next question: what kind of PTO bearing do they use? Everyone is sold on plain bearings, I'm sold on tappered roller bearings.

How much of the Hatz covers and fairings can be removed to access the exhaust port, intake port and turn this engine into a motorcycle engine with fan cooling???

At what rpm do they idle, and do they serve well at varing rpm, with different loads?

Thanks,
Cris

[Diesel Dave]

Chris, the piccie is of a generator shaft engine, the taper is there to meet with the alternator.

There is always some clearance provided from the shoulder to the crankcase face to allow for the many and varied PTO methods used.

The PTO side bearing on the Hatz is a roller bearing as are most, but you will find that the flywheel side is a plain bush.

Regards
Dave

[endlos]

i linked to some of these in the classifieds section, the same guy i linked to also has 75 of them listed for 200$ more on ebay, didnt bother linking it. seems they are old surplus, motor only. im considering snagging one and slapping it in a scooter, and then doing conversions for all the mexicans, tons of them here. now your scooter gets 200 mpg and runs on oil that you get from the rest you work at. seems like plenty of people would pay. i have to get my little workshop done first.

[andrewaust]

Hi Guy's


The Yanmar, and clone Yanmar L100's are a little different in crank design. The output shaft side of the crank has a solid bronze/white metal bushed bearing, while the flywheel side has a large cartridge ball bearing. The reason for this has to do with the oil feed. The oil pump is incorporated in the removable output side casing, being set up to supply pressured oil to the solid bush bearing which in turn supplies the crankshaft big end bearing.

The rocker assembly is set up to be only lubricated from oil splash/really mist that makes it up to the rocker area. I thought a pressure lube system would have been a better idea for the rockers, but it seems to work Ok how it is.

Tapered roller bearings work really well in the V4, and other Wisconsin petrol engines etc. I think the reasons these small diesels don't use them is the fact you need an end cap on one side of the crankshaft to supply a pressured oil supply for the big end bearing. The petrol Wisconsin engines got away with splash feed, but the increased load and pressures on the diesel big end bearing require a force fed oil supply. It could be done, but feel they are really trying to keep the units very compact and cost effective.

PS: The robin diesel engine could adopt a tapered roller bearing crank design as it has the flywheel and output shaft on the same side, and think it might have an oil feed to the big end bearing from the crankshaft end - not 100% sure on that one, but think I might be right?

Cheers


Andrew

[gilburton]

the problem with the robin is that the flywheel is on the same side as the driveshaft therefore the engine has to be mounted off centre(to the right) to compensate if you are using an Enfield although this could probably be compensated for if using a Comet drive.