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German bulldog tractors by Don


  Hi this page will give you some idea of the differences between the German Bulldog tractors that ran on what back then was called diesel fuel a sort of heavy diesel as we no today, whereas the British field Marshall tractors ran on distillate which is the diesel we no these days, both manuals are available from tractor manuals downunder …
Field Marshall
Before starting each day, check the lubricating oil level and fill fuel tank. Add water to the radiator if necessary. Also pay attention to the necessary greasing (see Figs. 53 and 54). Some users prefer to fill the fuel tank after the day’s run. This tends to reduce the amount of condensation. Declutch the engine by pushing forward the hand clutch control lever (Fig. 12). Immediately the engine starts re-engage the clutch.
Having checked that the gear change lever is in neutral and that everything else is in order, remove ignition paper holder (Fig. i) and turn the engine slowly round two or three times with the fuel lever (Fig. 2) in a position two-thirds open, i.e. towards the driver.
It should be possible to hear the slight’ purr’ of injection taking place as engine is turned over by hand. If starting by hand, see that valve on cylinder head is in the hand start position (Fig. 7.).
Set the decompression gear by taking hold of the lever (Fig. 3) so that the valve in cylinder head is open and at the same time pull outwards so that the roller is engaged on the thread on the flywheel rim nearest the operator. Having set the decompression gear, roll a piece of ignition paper (a quantity of which is supplied with the tools) into a tight, neat roll and insert in holder. Light and blow on it to make it glow, and carefully replace holder with burning ignition paper in the cylinder head, seeing that it is screwed tightly home. Give holder handle a slight tap with spanner to ensure seating, otherwise leakage of gas past the holder will carbon up the stem, make it difficult to remove and cause loss of power.
The tractor should now be turned over smartly by means of the starting handle in an anticlockwise
direction. When the decompression roller leaves the flywheel thread after about four revolutions, the decompression valve in the cylinder head will close, and the engine should fire.
If starting is not successful at the first attempt, the decompression gear should be re-set, a fresh ignition paper inserted, and the operation repeated. Remove starting handle immediately the engine fires by withdrawing outwards. Sometimes when starting, the engine accelerates to full speed, then stops firing and slows up. It can be usually prevented from stopping by pulling the compression release cable and holding the valve open for a few revolutions of the engine. On releasing the cable, the engine will start firing again.
After the tractor has started, allow engine to run up to speed, and then close down the fuel control lever to half-speed.
Allow the engine to run for a minute or so at half-speed in order to warm up, and the tractor is then ready for work. If possible avoid heavy pulls until the tractor is thoroughly warm. Should the engine be stiff when starting after a period of idleness, or during cold weather, starting will be assisted by decompressing the engine and turning round several times with the’ fuel control lever fully open, but without ignition paper holder inserted.

Lanz Bulldog
During first 100 hours of operation do not permit engine to run at full load (only —j or 3/4 load).
After first 100 hours of operation drain oil from crank case {Mq. 12) and from lubricating oil tank (No. 11), and also clean oil filter (No. 58). Once a week clean perforated cylinder jn exhaust upper pari (No. 70). After every 300 hours of operation drain oil from lubricating /oil tank (No. 11),
clean oil filter (No. 58), as well as the strainer in the crankcase base plate
(No. 61), and the exhaust (No. 70). After every 1000 hours of operation clean inside of
engine (No. 72—75). After every 1500 hours of operation clean the gears (No. ;8Q)
and the Bosch
lubricator (No. 60).
** Before Beginning To Work;
1 Fill up lubricating and fuel tanks(No. 17)/and check water.
2. if tractor has been idle for several days, prime lubricating oil (No. 10).
3. Check to see that air cleaner is clean, and if necessary, clean it; if it is dry, moisten it with oil (No. 23).
4. Lubricate the parts of the Bulldog listed under No. 15. P 5; Adjust atomizer correctly (No. 19).
Starting Engine
with electric starting with ignition (for starting with blow lamp see No. .-31); Open petrol stop valve of petrol tank (No. 18).
2. Open petrol stop valve on dashboard (No. 18). (Gas-oil stop valve remains closed.)
3. Set fuel lever for medium load (No. 34).
4. Remove right-hand cover guard,
5. Turn on ignition (No. 25).
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6. Prime petrol (3—5 strokes) (No. 20).
7. start engine with starting wheel (No. 30 g).
8. Open gas-oil stop valve (No. 18).
9. After 3—5 minutes running time: turn off ignition, close petrol stop valve on dashboard (no. 33).
While Working:
1. From time to time check oil supply in lubricating oil tank (No. 8).
2. Adjust fuel lever properly (No. 34).
3. Never overload engine for any length of time.
Shutting Down:
1. Open petrol stop valve on dashboard (No. 18).
2. Close gas-oil stop valve (No. 18).
3. Turnon ignition,
let engine run for one minute,
4. Set fuel lever all the way back (No. 34).
5. Close petrol stop valves (No. 18).
6. Turn off ignition.
After Shutting Down:
1. Pour a few drops of petroleum into cylinder through filler petcock (No. 35).
2. Clean air cleaner (No. 23).
3. If frost is forecast, drain radiator completely (No. 3).
4. Subject exhaust to an early and thorough cleaning (No. 70).
5. From time to time inspect the cylinder head for scale in the cooling water compartments (No. 54).

A Sincere Note From Us:

This blog post was written by our late founder, Don. If you would like to read more, click here.
We will add more old posts written by Don in the future as a dedication for him.