Komatsu SAA6D107E Engine
The Komatsu SAA6D107E is a six-cylinder, 6.69-liter turbocharged diesel engine producing approximately 155 hp (115 kW) at 2,000 rpm. It is the powerplant for the Komatsu PC200-8 and PC210-8 hydraulic excavators and is engineered to the Tier 3 / Stage IIIA emission window.
Specifications
Displacement: 6.69 L. Configuration: inline six-cylinder, turbocharged, intercooled. Bore × stroke: 107 mm × 124 mm (hence the '107E' designation). Compression ratio: 17.5:1. Rated power: 155 hp at 2,000 rpm. Peak torque: approximately 720 N·m at 1,500 rpm. Fuel injection: mechanical (in-line pump) on -1 variant; common-rail electronic on -3 variant. The mechanical-injection -1 variant is the version that powers the volume PC200-8 family from 2007-2013 production.
Tier 3 emission compliance
The SAA6D107E-1 meets Tier 3 (US EPA) and Stage IIIA (EU) off-road emission standards. It does NOT require Diesel Exhaust Fluid (DEF / AdBlue) and does NOT use Selective Catalytic Reduction (SCR). This is the critical compatibility property for African, Middle Eastern, and rural Asian deployments where DEF distribution is limited and rural diesel often exceeds 500 ppm sulphur — the engine tolerates lower-grade diesel without modification.
Compatible Komatsu models
The SAA6D107E powers: Komatsu PC200-8 (all sub-variants -8 / -8N1 / -8M0 / -8M1), Komatsu PC210-8, Komatsu PC220-8, and Komatsu PC200LC-8 (long undercarriage). It is replaced by the SAA6D125E in the 30-ton class (PC300-8) and the SAA12V140E in the 45+ ton class.
Service intervals and overhaul
Engine oil + filter: 500 hours. Fuel filter + air filter: 1,000 hours. Hydraulic oil + filter (separate from engine): 2,000 hours. Injector spray pattern verification: 4,000 hours. Top-end overhaul (head, valves, valve seats): typical at 8,000-10,000 hours operational. Bottom-end overhaul (crankshaft bearings, piston rings): typical at 12,000-15,000 hours.
Common failure modes
Three failure patterns observed at scale in the 2015-2025 fleet: (1) injection pump timing drift after 7,000 hours — symptom is power loss + smoke at idle; (2) turbocharger bearing wear at 9,000+ hours — symptom is whine + reduced boost pressure; (3) intercooler core mud-pack in dusty African / Asian site conditions — symptom is gradual power loss + elevated exhaust temperature. All three are repairable with parts available through Mantrac Komatsu dealer network.