20156point7
New User
I see that the 2555 was offered in 2 versions a turbo and a non turbo. I have heard that the turbo 2555 will dyno the same as a 2755, is this true. It really doesn't make sense to me why they would make 2 of the same tractors.
- Thread starter 20156point7
- Start date
Here's how Tractordata explains it:
"The John Deere 2555 was available in two versions. The basic model has the collar shift transmission, naturally-aspirated engine, 540 RPM PTO, 2WD, and ROPS. With the TSS transmission the engine was turbocharged, PTO upgraded to 540/1000, and it was possible to add a cab and four-wheel drive."
Obviously, 4WD takes power and a cab typically means "AC", which also takes power.
"The John Deere 2555 was available in two versions. The basic model has the collar shift transmission, naturally-aspirated engine, 540 RPM PTO, 2WD, and ROPS. With the TSS transmission the engine was turbocharged, PTO upgraded to 540/1000, and it was possible to add a cab and four-wheel drive."
Obviously, 4WD takes power and a cab typically means "AC", which also takes power.
The JD 2555 was made in two different price packages. The cheaper units was made to compete with the cheaper Ford and MF tractors.
The JD 2555 price fighter was non turboed, stamped steel wheels, flange and cheaper SCV valve, and the Power assisted steering.
The premium JD 2555 was turboed, Cast steel wheel hubs, rack and pinion axles. Full hydrostatic power steering, Top shaft Synchronized (TSS) transmission, and Deluxe SCV values with float.
The JD 2755 is the same basic tractors as the premium JD 2555 just with more horse power and standard features that where options on the JD 2555.
JD has done this with some models of tractors for years. The extra cost is the difference in warranty cost when you up the Horse power. An example would be the JD 4055 with the 466 motor and the JD 4255 they are the exact same tractor other than the injection pump setting. There was about a $3000 price difference when they where new.
The JD 2555 price fighter was non turboed, stamped steel wheels, flange and cheaper SCV valve, and the Power assisted steering.
The premium JD 2555 was turboed, Cast steel wheel hubs, rack and pinion axles. Full hydrostatic power steering, Top shaft Synchronized (TSS) transmission, and Deluxe SCV values with float.
The JD 2755 is the same basic tractors as the premium JD 2555 just with more horse power and standard features that where options on the JD 2555.
JD has done this with some models of tractors for years. The extra cost is the difference in warranty cost when you up the Horse power. An example would be the JD 4055 with the 466 motor and the JD 4255 they are the exact same tractor other than the injection pump setting. There was about a $3000 price difference when they where new.
20156point7
New User
thanks for the replies, I still don't see how john deere says a turbo'd engine is going to make the same power as the naturally aspirated engine. The 2555 and 2755 use the same exact turbo too.
The JD 466 block is used from a low of 105 Horse power to the high of over 225 horse power. The main difference where the injection pumps, injectors, oil cooled pistons, turbos and intercooling.
So the JD 2555 injection pump is set at one fuel delivery setting and the JD 2755 injection pump is set at a slightly higher fuel delivery setting. also the JF 2555 naturally aspirated injection pump would be set higher than the injection pump on the turboed JD 2555. The Turbo would be more efficient on the fuel it used.
So the JD 2555 injection pump is set at one fuel delivery setting and the JD 2755 injection pump is set at a slightly higher fuel delivery setting. also the JF 2555 naturally aspirated injection pump would be set higher than the injection pump on the turboed JD 2555. The Turbo would be more efficient on the fuel it used.
One has to remember that in those days John Deere's turboed tractors usually produced 10% or greater horse power than factory advertised rating. The naturally aspirated tractors typically were at the advertised rating. A 2555 with turbo would out perform a 2555 natural with few exceptions. I bought a new 2750 in 1984 and dyno tested it after it was broken-in, the dyno showed 75hp.
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
According to Tractordata.com 2755 is rated at 2300 rpm's while 2555 NA is rated at 2500 rpm's & 2355 T @ 2300 rpm's
20156point7
New User
I have found a really nice 2555 with 4wd, cab, hi lo trans, and just about everything. The seller doesn't know if it is the turbo version, isn't all the 2555s with a cab and hi lo trans the turbo version?
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