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Ruggerini RF120

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Ruggerini RF120 Empty Ruggerini RF120

Post by samc88 Sat Dec 06 2014, 22:58

Right, I had a thread on here, but I forgot my username so had to reregister. This is an italian single cylinder diesel which I aquired from my Dads work. It was used to drive a fire pump on board the boat he worls on but was withdrawn from service.

Ruggerini RF120 P3310252
Apologies for the blurred photo.

Ruggerini RF120 P3310250

Ruggerini RF120 P3310249

I need to get a set of stud extractors from machine mart as one of the Allen bolts holding the back plate in was seized solid and has rounded off (the bottom one). The other three came off with some gentle persuasion in the form of a large hammer, breaker bar and torch. Here is said plate before I started to try and remove it,
Ruggerini RF120 P5190285

Since I have to wait for the extractors I decided to take the sump off to look at the bottom of the engine, due to the outside appearance of the engine /9rotten cowling and all) i wasn't expecting much but I was very pleased to find that it was all nice and clean inside.
Ruggerini RF120 P8210548

Ruggerini RF120 P8210549

Before anything else, I had a look at fetching the tank off which was a PITA as the bolts had siezed solid but with a liberal soaking of penetrating fluid they came undone with a bit of effort. One of the bolts which holds the tank backing plate to the barrel had sheared off flush though which will be drilled and tapped out to M8 again

Ruggerini RF120 PC060461

Then I removed the barrel. The nuts came off the studs easily enough

Ruggerini RF120 PC060462

Ruggerini RF120 PC060463

The pushrods were also lifted out of the way, maiing sure they're marked which ones forward and aft, and then the tube they live in is lifted out the way

Ruggerini RF120 PC060465

Ruggerini RF120 PC060466

Then I took the piston and conrod assembly out

Ruggerini RF120 PC060467

Ruggerini RF120 PC060468

Ruggerini RF120 PC060470

Ruggerini RF120 PC060471

Ruggerini RF120 PC060472

The bearings look good. There is a slight bit of endfloat in the crankshaft though and it seems to have a slight highspot somwhere along its rotation

Ruggerini RF120 PC060473

Ruggerini RF120 PC060474

I did try and remove the injector, but thats stubbornly resisting removal

samc88

Posts : 2
Join date : 2014-11-22

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Post by Woodsman Sun Dec 07 2014, 10:05

Looks like a nice project. Never really got my head around diesels - despite having a diesel engined truck. Be happy that the company still operates so spares may not be such a problem. Good Luck and keep posting pictures.

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Tha can alus tell a Yorkshireman - but tha can't tell him much.
Woodsman
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Post by samc88 Mon Oct 26 2015, 17:43

right then more progress! Eventually got the block completely stripped down so am now on to reassembly.

first job was the rotary oil pump which is driven off the injection pump gear

Ruggerini RF120 PA260507

Ruggerini RF120 PA260508

Ruggerini RF120 PA260509

the shaft end is D shaped so will only go one way into the oil pump one way

Ruggerini RF120 PA260510

Ruggerini RF120 PA260511

Ruggerini RF120 PA260512

A view of the injector pump cam

Ruggerini RF120 PA260513

Next up the followers i think they are called

Ruggerini RF120 PA260514

Ruggerini RF120 PA260515

Ruggerini RF120 PA260516

Next up the little camshaft

Ruggerini RF120 PA260517

there is a bit of tarnishing on the cam but should be fine

Ruggerini RF120 PA260518

Camshaft in place and the governor mechanism in place

Ruggerini RF120 PA260519

Next slide on the washer

Ruggerini RF120 PA260520

next slide on the spacer

Ruggerini RF120 PA260521

next the tiny key

Ruggerini RF120 PA260522

And finally the cam gear whih has governor weight type things on the back of it, never seen this before

Ruggerini RF120 PA260523

Also before the gear there is a circlip which stops the spacer coming too far on the shaft

Ruggerini RF120 PA260526

Finally the gear can be put in place, this is a tight fit, i had to press it into place

Ruggerini RF120 PA260527

Next I slid the crankshaft into place

Ruggerini RF120 PA260528

Ensuring the timing marks were good

Ruggerini RF120 PA260529

Ruggerini RF120 PA260530

Wth that in place the piston could be installed. However i had to take it out as i didnt have the clearance for my piston ring compressor (I had to put the piston in the barrel first and then attach both at the same time.

Ruggerini RF120 PA260531

Ruggerini RF120 PA260532

Ruggerini RF120 PA260533

Next up I refitted the pump

Ruggerini RF120 PA260534

Finally I refitted the diesel pipe from pump to injector after refitting the head to the cylinder. (It was quite fiddly doing this and getting the pushrods to stay in the right place)

Ruggerini RF120 PA260535

And thats where im up to at the minute, I need a new female banjo fitting, the old one had the pipe cracked which was letting air in which I suspect is what stopped it running. I also need to drill and tap the sheared bolt in the block which i can do after the cover plates have been put back into place.

samc88

Posts : 2
Join date : 2014-11-22

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