Old tractor Landini @scale 1/7

[ZAPJACK]

The next step is the planetary differential.
the 45° gear are coming from www.maedler.de and deeply modified
In some case, to have a high level of precision, the gear was fixed with hard Loctite on a provisional shaft and machined in precision collets.
LeZap

 

[ZAPJACK]

This is the general arrangement of gearbox. 3 speed + R.
The more stressful job was machining of gear box case. Because the smallest error of axis could be a disaster. Fortunately, with help of DRO position was perfect.
LeZap

 

[ZAPJACK]

Follow-up of gearbox forks
Starting from a simply mild steel plate
LeZap

 

[ZAPJACK]

Now is the cylinder and cylinder head
No particular difficulties, the cylinder is coming from iron GGG60
Lot of changing position during machining process of the cylinder-head
Also, need tailor-made jig for some specific mounting
After machining, honing with Sunnen honing machine
The finishing is really exceptional, close to a mirror !!!
LeZap

 

[ZAPJACK]

Gearbox oil level glass.
Machining of the clutch control arm
LeZap

 

[ZAPJACK]

This is the thrust ball bearing for the clutch control
Its made from hard steel 42CrMo6V
LeZap

 

[idahoan]

Amazing work Jack!

Thanks for sharing your great photos; I'm enjoying the progress on your tractor.

Dave

 

[ZAPJACK]

This is the construction of the "Pitman arm" of clutch command
Mainly handcraft job with hand-files, emery-paper and final polishing.
Less machining works.
The security hairpin is made from parts of a bicycle brake cable, so 0.4mm
LeZap

 

[ZAPJACK]

This is the clutch. The body is made in bar-stock steel.
Before machining the six fingers, they are tin welded
LeZap

 

[ZAPJACK]

Mounting of the spikes on the wheels
LeZap

 

[ZAPJACK]

The building of the water radiator start from hex 6mm messing bars
And the fals gasoline tank, is made from messing plate of 1mm
LeZap

 

[ZAPJACK]

Machining of the small caps of the gasoil tank.
Rack-rail of speed control throttle.
Machining of the PTO clutch and finally the hand brake handle
LeZap

 

[kadora]

simply unbelievable

 

[ZAPJACK]

The mud guard was difficult to made. Two trial before success.
At first, the binding of "L" profile in messing.
I test different possibility to do it, and at least, the best solution was heating with a blow-pipe and fold it gently on a pre-calibred aluminium disc (see on the late)
The next difficulty was the positioning of the hole for the 1mm rivets
LeZap

 

[idahoan]

Very nice!

Thanks for the update.
Dave

 

[ZAPJACK]

The muffler is made from simply brass metal sheet. And the piston is coming from cast iron bar-stock.
LeZap

 

[ZAPJACK]

Now the painting and some comparison with real tractor
The diagram gives:
130° for intake
100° for exhaust
100° for transfert
So, very "quiet" diagram to have torque and slow RPM
LeZap

 

[ZAPJACK]

The cylinder and the piston are made from GGG60 cast iron
LeZap

 

[Aerofourcycle]

Thanks for the photo's. Interesting you went cast iron on cast iron.

 

[demaic]

Dear Zapjack,
You are a true professional!
U bent een echte vakman!!
Vous êtes un vrai professionnel!
Demaic