Ursus 1634
Production years: 1991–2009 • Assembly plant: Warsaw / Lublin, Poland
Sources and field evidence
Catalog Archive: Baseline specifications compiled from historical manufacturer archives and equipment registries. Laboratory test report verification in progress.
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Engineering & Capability Benchmark
Specific output, tractive ratio, and segment percentile
Engine and power specifications
- Engine model
- Zetor Z 8602.12
- Fuel type
- Diesel
- Rated horsepower
- 152.9 hp
- Rated PTO Power
- 138.1 hp (Ursus specification)
- Cylinders
- 6
- Displacement
- 6.8 L (416.4 ci)
- Bore / stroke
- 4.33x4.72 inches 110 x 120 mm
- Rated RPM
- 2200 RPM
- Crankcase oil capacity
- 20.1 qts (~19.0 L)
- Coolant capacity
- 30.6 qts (~28.9 L)
Maintenance picks for the 1634
Oil capacity 20.1 qts — match the filter before you drain.
Transmission and chassis specifications
- Transmission type
- Two-speed power shift (12F/6R)
- Gears (forward / reverse)
- 12 forward / 6 reverse
- Drive system
- 4WD
- Wheelbase
- 106.5 in
- Front tire
- 14.9-24
- Rear tire
- 18.4-38
- Hydraulic flow
- N/A
- Rear hitch
- II
Implement Draft & Ballast Matcher
Simulate draft resistance, drawbar power transfer, and optimal axle weight distribution for Ursus 1634.
Optimal engine load (98%). Tractive efficiency is peaked within standard 8% - 12% slip window.
Tractor is currently light for this heavy draft tool. Add ~1745 kg (3,848 lbs) ballast to prevent tire slip and premature wear.
Instant Used Market Valuation Projector
Algorithmic resale estimate for Ursus 1634 (1991)
Direct Segment Rivals & Showdowns
Head-to-head match-ups calibrated by horsepower and era
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Ursus
Poland • 65 Models
Ursus is a historic Polish tractor manufacturer with roots tracing back to 1893 when Zaklady Mechaniczne Ursus (Ursus Mechanical Works) was established in Warsaw. The company initially focused on agricultural machinery and tools before achieving a significant milestone in 1922 with the production of its first tractor. This marked the beginning of Ursus's journey as a major player in the agricultural equipment sector. The 1950s were a period of growth and technological advancement for Ursus, as the company began manufacturing tractors based on Zetor designs, which proved to be highly successful and solidified its reputation in the Eastern European market. In the 1970s, Ursus further expanded its technological capabilities through a licensing agreement with Massey Ferguson, a leading global tractor manufacturer. This collaboration allowed Ursus to incorporate advanced design and engineering principles into its products, enhancing their performance and reliability.
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