Wikipedia's first sentence called it “large track-type tractor”. Today it says “large track-type tractor designed and manufactured by caterpillar inc”.
Measured, not asserted. Every count, date and revision on this page was taken from Wikipedia's own history and checked against the live article. The words quoted are theirs.
Machine-checked against the full current article on 2026-08-03.
We saved snapshots of this article over twenty years; you are reading the 2005 one. Red dashes: removed from Wikipedia since.Pale dots: rewritten; the numbered note shows what it says now.Red text: written in or rewritten since the previous snapshot.1 tap a number or a side note to jump between them
The opening as it read in 2005
Caterpillar D9 is a large track-type tractor (commonly referred to as a bulldozer ) with caterpillar tracks designed and manufactured by Caterpillar Tractor Company .1The D9, with 354 kW (474 hp ) of gross power and an operating weight of 49 tons, is in the upper end, but not the heaviest, of Caterpillar's track-type tractors, which range in size from the D3 57 kW (77 hp), 8 tons, to the D11 698 kW (935 hp), 104 tons .2The D9 is mostly used as bulldozer , and though it comes in many configurations, it is mostly common in its basic dozer configuration: equipped with a detachable large blade and a rear ripper.3The size, durability, reliability, and low operating costs has made the D9 one of the most popular large track-type tractors in the world, with the Komatsu D275A as one of its most direct competitors.4The D-9 gained high media attention in the new millennium due to its military applications by the Israeli Defence Forces .5
This is Wikipedia's own text, saved in our repository. Their copy of it is revision 16162199.
The opening as it stood in 2010 1 passage from the previous snapshot no longer appear
D9H CAT D9L, the first D9 model to employ the "high drive" configuration.The Caterpillar D9 is a large track-type tractor designed and manufactured by Caterpillar Inc.Though it comes in many configurations it is usually sold as a bulldozer equipped with a detachable large blade and a rear ripper attachment. The D9, with 354 kW (474 hp ) of gross power and an operating weight of 49 tons, is in the upper end (but not the heaviest), of Caterpillar's track-type tractors, which range in size from the D3 57 kW (77 hp), 8 tons, to the D11 698 kW (935 hp), 104 tons . The size, durability, reliability, and low operating costs have made the D9 one of the most popular large track-type tractors in the world. The Komatsu D275A is one of its most direct competitors.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 365971193.
The opening as it stood in 2015
D9H CAT D9L, the first D9 model to employ the "high drive" configuration. The Caterpillar D9 is a large track-type tractor designed and manufactured by Caterpillar Inc. It is usually sold as a bulldozer equipped with a detachable large blade and a rear ripper attachment. The D9, with 354 kW (474 hp ) of gross power and an operating weight of 49 tons, is in the upper end of Caterpillar's track-type tractors, which range in size from the D3 57 kW (77 hp), 8 tons, to the D11 698 kW (935 hp), 104 tons . The size, durability, reliability, and low operating costs have made the D9 one of the most popular large track-type tractors in the world. The Komatsu D275A is one of its most direct competitors.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 663738638.
The opening as it stood in 2020 1 passage from the previous snapshot no longer appear
D9H CAT D9L, the first D9 model to employ the "high drive" configuration. 'High drive" refers to the position of the drive sprocket.The triangular track shape is caused by the need to accommodate the drive sprocket which is mounted high on the machine relative to ground level and higher than previous existing designs.A Caterpillar D9N on a beach CAT D9T, the current generation of the Caterpillar D9 tracked-type tractor series. The Caterpillar D9 is a large track-type tractor designed and manufactured by Caterpillar Inc. It is usually sold as a bulldozer equipped with a detachable large blade and a rear ripper attachment. The D9, with 354 kW (474 hp ) of gross power and an operating weight of 49 tons, is in the upper end of Caterpillar's track-type tractors, which range in size from the D3 57 kW (77 hp), 8 tons, to the D11 698 kW (935 hp), 104 tons. The size, durability, reliability, and low operating costs have made the D9 one of the most popular large track-type tractors in the world.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 957867419.
The opening as it stood on October 6, 2023
Large bulldozer D9H CAT D9L, the first D9 model to employ the "high drive" configuration. 'High drive" refers to the position of the drive sprocket. The triangular track shape is caused by the need to accommodate the drive sprocket which is mounted high on the machine relative to ground level and higher than previous existing designs. A Caterpillar D9N on a beach CAT D9T, the current generation of the Caterpillar D9 tracked-type tractor series. The Caterpillar D9 is a large track-type tractor designed and manufactured by Caterpillar Inc. It is usually sold as a bulldozer equipped with a detachable large blade and a rear ripper attachment. The D9, with 354 kW (474 hp ) of gross power and an operating weight of 49 short tons (44 t), is in the upper end of Caterpillar's track-type tractors, which range in size from the D3 57 kW (77 hp), 8 short tons (7.3 t), to the D11 698 kW (935 hp), 104 short tons (94 t). The size, durability, reliability, and low operating costs have made the D9 one of the most popular large track-type tractors in the world.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 1173393071.
The opening as it stood in 2025 2 passages from the previous snapshot no longer appear
Large bulldozer Introduced in 1974, the 410 hp (310 kW) D9H was the last D9 with conventional track drive CAT D9L, the first D9 model to employ Caterpillar's "high drive" configuration, which raises the drive sprocket, resulting in elevated ground clearance and a triangular track.The 370 hp (280 kW) D9N replaced D8L in 1987 CAT D9T, the current generation of the Caterpillar D9 tracked-type tractor series The Caterpillar D9 is a large track-type tractor designed and manufactured by Caterpillar Inc. It is usually sold as a bulldozer equipped with a detachable large blade and a rear ripper attachment. The D9, with 354 kW (474 hp ) of gross power and an operating weight of 49 short tons (44 t), is in the upper end of Caterpillar's track-type tractors, which range in size from the D2 69 kW (92 hp), 9 short tons (8.2 t), to the D11 698 kW (935 hp), 104 short tons (94 t). The size, durability, reliability, and low operating costs have made the D9 one of the most popular large track-type tractors in the world. As the size, power, and weight of the larger track-type tractors dictate that they are used primarily for major projects, the D9 is most commonly found in construction, demolition, forestry, mining, waste, and quarry operations.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 1280123377. This is our newest snapshot; the live article may have moved again since.
Today
Wikipedia's first sentence called it “large track-type tractor”. Today it says “large track-type tractor designed and manufactured by caterpillar inc”. Read the current article and compare.
2005
2010
2015
2020
Oct '23
2025
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What Wikipedia says this is
Every article opens by defining its subject. This one was redefined since 2005, and today's defining sentence is their current revision.
Then
large track-type tractor
Now
large track-type tractor designed and manufactured by caterpillar inc
Struck red text is no longer in the article; dotted amber text was rewritten. Every revision id links to Wikipedia's copy; the text shown is our own saved copy. Data: /data. Wikipedia text is CC BY-SA; quoted for the record; not affiliated with Wikipedia.
