Deere 5020 Equipped With 8630 Engine

Deere 5020 Equipped With 8630 Engine TRACTORS Made-It-Myself It s as agile as a Deere 4020 tractor and as powerful as an 8630 says Harry Isaac Saltcoats Sask who spent 300 hours rebuilding his 1967 Deere 5020 2-WD tractor doubling horsepower by replacing the 120 hp diesel engine with a used 240 hp diesel engine from a Deere 8630 tractor Isaac who designed the tractor mainly to make drainage ditches and do other earth moving jobs mounts a 9-ft wide Degelman blade designed for 4-WD tractors on front and pulls either a home-built 16-ft leveling blade or a 7-yard hydraulic-powered scraper behind He bought the 5020 as a junker with 6 000 plus hours for $2 000 He rebuilt the engine turbocharged it and used it for a year before it wore out He replaced it with the 8630 engine and also equipped the tractor with a White 2-105 cab a Deere 4640 hood and oversized 30 5 by 32 rear tires I needed more horsepower but I couldn t justify buying a newer larger tractor says Isaac I planned to replace the engine with an 855 Cummins diesel engine which would ve cost $6 000 to $8 000 Then a Deere dealer told me that the 8630 engine would fit right in my 5020 I found two used engines for less than it would ve cost to rebuild the old one The engine I installed had 3 500 hours The engine s extra horsepower combined with 5 000 lbs of weights that I added to the tractor improved its horsepower-to-weight ratio Itconverted the 5020 from a clumsy sluggish tractor into a snappy one that responds very quickly We also use this tractor for tillage work but we don t like to work it too hard for the simple reason that these engines don t have a very good reputation for long life We think that if we work it at 50 to 75% of rated horsepower and at less than rated rpm it will last a good while longer The only time we work it at full power is when filling the scraper and that takes only 10 seconds at a time: the tractor s weight is balanced so that in 5th gear the rear wheels can still spin instead of the tractor lugging down The blade adds enough weight in front that the tractor still steers fairly well under load I put just enough air in the 16 by 16 1 front tires to keep them up which makes for a smoother ride over ridges and stones However because of the extra weight I have to be careful not to get stuck in soft ground or let the front wheels drop into holes or ruts while turning sharp as this simply causes the steering cylinder brackets to break I have to remember that it s an overweight farm tractor not an industrial earth mover With the exception of the cab itself Isaac kept the modified tractor as Deere as possible using parts from a Deere 8630 engine cooling fan and muffler 4440 hydraulic pump and air conditioner 6030 hydraulic pump mount radiator and springs for a ceramic disc clutch 4850 fan shroud 5010 hydraulic lines and fittings 4640 hood fuel tank Quad shift linkage and air conditioning condenser 105 combine cab ladder and 8820 combine air filter precleaner Isaac replaced the 5020 cab because it was noisy and wasn t air conditioned He bought the used White cab from a neighbor for $500 The White cab is comparable to Deere s Generation II cab and fit the 5020 perfectly It s air-conditioned quiet and comfortable He replaced the 5020 s hood with the longer 4640 hood when he stretched the wheel base 12 in in order to make room for the 4640 s fuel tank and air conditioning condenser He mounted the 4440 s air conditioner in the cab then remounted the steering box in the console and moved the noisy steering proportioner valve underneath the tractor He connected the 4640 s Quad shift linkage to the 5020 s 4-speed transmission It now shifts much nicer says Isaac He installed the 4440 s hydraulic pump which he bought from a salvage yard for less than it would ve cost to repair the 5020 s worn-out pump The new pump also improved hydraulic capacity In order to change the air filter pre-cleaner the hood had to be raised so he installed a rubber mount and latch system at the rear of the hood that allows him to easily unlatch and raise the hood He replaced the 5020 muffler with the 8630 s muffler The 8630 muffler obstructs the driver s view some-what says Isaac I d install a smaller muffler next time Contact: FARM SHOW Followup Henry Isaac P O Box 386 Saltcoats Sask S0A 3R0 360-744-2539

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