FORCETALLY
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Measured figures
Configuration
| Specification | Caterpillar D4 | M1150 assault breacher vehicle |
|---|---|---|
| Manufacturer | Caterpillar Inc.[source] | — |
| Type | small bulldozer[source] | Military engineering vehicle[source] |
| Introduction | Caterpillar first introduced the RD4 in 1936[source]RD4 predecessor only, not modern D4 variants | — |
| Powerplant | D315 engine[source]Historical D4U series only | — |
| Gauge | 6U = Narrow gauge 44 in (1,100 mm)[source] |
Crew
Single sourceBars compare reported quantities only. A larger figure does not make a system better; configurations and test conditions differ.
7U = Wide Gauge 60 in (1,500 mm)[source]7U only
| — |
| Variants | Caterpillar D4C - 1959-63 Caterpillar D4D - 1963-77 Caterpillar D4E - 1977-84 Caterpillar D4H - 1985-96 Caterpillar D4C SII -1990-93 Caterpillar D4C SIII - 1993[source]Production/version history; never service-ending intervals | — |
|---|
| Country of origin | United States[source]Inventory Origin column; table 7, row 11, cell 5; revision 1368748817; retrieved 2026-09-30 | — |
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| Place of origin | — | United States[source] |
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| In service | — | 2009–present[source] |
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| Used by | — | United States Army United States Marine Corps (2009– c. 2023) Australian Army (2025-present) Armed Forces of Ukraine[source] |
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| Wars | — | War in Afghanistan Russo-Ukrainian war Russian invasion of Ukraine[source] |
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| Unit cost | — | $14 million (FY 2009)[source] |
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| No. built | — | 239[source] |
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| Main armament | — | M58 MICLIC[source] |
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| Secondary armament | — | 1 .50 BMG M2 machine gun mount on top of the vehicle.[source] |
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| Reported operators | — |
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