David Brown Parts

Technical Tips for the restorer

Here will appear various tips for those of you restoring your tractors.

1.    Water Distribution tubes

This item has been introduced to the range as although unseen, it is a very essential item to prevent engine damage. It directs water from the pump to where it is most needed, i.e. the exhaust valves, etc. It also ensures that all cylinders are cooled evenly. Without it valve failure can occur together with overheating of the rear cylinders. Therefore check your cylinder head carefully during restoration. Usually there are just a few rusty remains of the original tube, these obviously need to be cleaned out. In addition be aware that some of the remains may lay in the bottom of the water jacket together with other debris. It is therefore advisable to remove the cylinder liners and clean this out. Some restorers have commented to me that they have found debris as high as half way up the liners!! When replacing the liners you may also take the opportunity of fitting new seals.

2.    Early type engine showing centre split timing case using gasket part number 10032

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3.    Later type engine showing deep flange front casting and flat steel backplate type timing case using gasket part number 33400

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4.    Governor bearing housing / dynamo (early type) gasket part number 12412

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5.    Fitting of copper rings to adjust liner protrusion. Copper ring fits between flange B and recess in cylinder block to provide protrusion C of 0.006"-0.008" for flat topped sleeves. Ridged sleeves (as most new ones are) need to protrude 0.003"-0.004". When ordering copper rings, specify either  

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6.    As the original round headed quarter inch BSF sheet metalwork fixing screws are no longer available we are now offering them in the coarser BSW thread. The only difference this makes is that, in some situations, it is necessary to drill out the original thread and fit a nut to the rear. e.g. down the sides of the radiator. The use of Loctite or similar is advised due to the coarseness of the thread. The only situation where this cannot be done is the blind holes on the fuel tank. In this situation choose the best of the original screws cut down to length as required.

Updated Thursday, 19 January 2006