I have a soft spot for Massey Harris tractors as my brother and I started wheat farming with a second hand $400 Massey Harris 745
About 10 years ago I saw a Massey Harris 744D row crop model for sale in Gayndah so I bought it and got it delivered on a back load.
It started easily and drove around quite well .As I don't have enough sheds to fit all my tractors it sat outside where I covered all openings to the weather with tin cans and periodically being turned over with the crank handle.Last week when I went to turn it over it was seized which surprised me as it was turning over when last checked in January.I dropped all the flood damage work ,towed it to the shed and removed the injectors and put a mixture of ATF and thinners down the hole left it for a few days still no luck. A freind came around and we tried again,he on the crank handble and I had a 500mm shifter on the crank nut. Still no movement so I decided to take the head off
I am impressed with the build of this motor but some things intrigued me as in the photo below there were a mixture of Whitworth and AF nuts and some metric on the injectors
To be continued as time permits
You can't have too many toys!
The following user(s) said Thank You: cobbadog, PaulFH
Mine turns over but believe that injector pump plungers are stuck so it won't start/run. Nice smooth motor, but provides a good illustration of 'torque rise' when going through a tough patch. ie there is none.
mammoth wrote: Mine turns over but believe that injector pump plungers are stuck so it won't start/run. Nice smooth motor, but provides a good illustration of 'torque rise' when going through a tough patch. ie there is none.
My book on the Perkins P series motors says it has a bore of 3.5 in X stroke of 5 in 4.73 litres displacement 46 BHP at 1500 rpm.
Small bore and long stroke don't produce much torque
All the P series Perks get excessive main bearing wear....on a P6 its usually the rear 3 mains will be badly worn........Fortunately ,the thin shell type bearings are still available,however early motors have thick bronze shells that need to be line bored,and are no longer available anyway.......the rods are the same....thin shell in late motors,thick in early ones........The P6 in my Coles crane seized because the fine mesh oil strainer in the sump choked with sludge......fortunately ,it seized on one rod ,and the mains were OK ,because they were thick shell.........I reground the rod journal ,and fitted one 020 bearing to a thin shell rod........and the motor went good for as long as I could climb into the old beast.....which I can no longer do.
The following user(s) said Thank You: cobbadog, oliver1950
I was shocked when I was told about the engine siezing up. As Oliver said it had all openings covered and with a tarp over the lot as well. This tractor to me is one that needs to be kept running and to be presented as it is now in its ''working clothese''. You can make out the stencilling on the tinware and just commands respect. Not sure if anything else has been found wrong but it would be intersting to know how water got inside #4, via head gasket?
I hope to hear it running again in the near future and maybe see it at the Rally this year.
Cheers Cobba & Cobbarette
Coopernook, The Centre of our Universe.