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
- Mitsubishi S4L2
- Fuel type
- Diesel
- Rated horsepower
- 38.5 hp
- Rated PTO Power
- 29 hp (Montana specification)
- Cylinders
- 4
- Displacement
- 1.8 L (107.3 ci)
- Bore / stroke
- 3.07x3.622 inches 78 x 92 mm
- Rated RPM
- 2700 RPM
- Crankcase oil capacity
- N/A
- Coolant capacity
- N/A
Maintenance picks for the R3644
Filters, oil and common wear parts for this model.
Transmission and chassis specifications
- Transmission type
- Hydrostatic (12-speed)
- Gears (forward / reverse)
- 12 forward
- Drive system
- 4WD
- Wheelbase
- N/A
- Front tire
- 7-16,4PR (7-14)
- Rear tire
- 12.4-24,8PR (11.2-24)
- Hydraulic flow
- N/A
- Rear hitch
- I
Implement Draft & Ballast Matcher
Simulate draft resistance, drawbar power transfer, and optimal axle weight distribution for Montana R3644.
Theoretical draft formula suggests 3,850 lbs. Official manufacturer GVWR is unrecorded for this catalog entry, so target weight is constrained to an engineering structural estimate (~135% of base operating weight) to prevent chassis overload.
Engine demand (74.9 HP) exceeds rated power (38.5 HP). Reduce working speed by 1.0-1.5 mph or reduce working width.
Target ballast is capped at 3,661 lbs based on structural engineering estimate (~135% base weight; official manufacturer GVWR unrecorded). Avoid adding excess ballast beyond this benchmark to protect axle bearings and chassis.
Instant Used Market Valuation Projector
Algorithmic resale estimate for Montana R3644 (2007)
Direct Segment Rivals & Showdowns
Head-to-head match-ups calibrated by horsepower and era
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Montana
USA • 34 Models
Montana is an American brand specializing in agricultural machinery and lawn equipment. Established in 2004, the brand has positioned itself within the niche of outdoor power equipment, catering to both professional and consumer needs. Montana's product range typically includes lawn mowers, trimmers, edgers, and other machinery designed for maintaining large yards and agricultural spaces. The brand's focus on durability, performance, and innovation has allowed it to carve out a space in the competitive market of outdoor equipment. Despite being a relatively young brand, Montana has garnered a reputation for quality and reliability, particularly among customers in rural and suburban areas of the United States. The company's commitment to providing robust machinery that can withstand rugged environments aligns with the spirit of the state of Montana, known for its vast landscapes and demanding outdoor conditions. While specific details about the brand's headquarters city are not available, it is known to be based in the USA. Montana operates independently and does not belong to a larger conglomerate or parent group, maintaining its focus on delivering specialized products for outdoor maintenance and agricultural tasks.
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