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RG74DXH Operator · Service · Maintenance Manual
Foreword
Machine Description
The Rayco RG74DXH is a high-production stump cutter
powered by a massive 3.8L Cummins 74hp diesel engine that
generates peak torque of 295ft-lbs. The large displacement
diesel engine delivers more cutting power than most 100hp-
class stump cutters and meets Tier 4 Final emissions
without complex after-treatment systems. Compared to the
competition, the difference is clear.
6
• Cummins QSF3.8 diesel engine meets Tier 4 Final/
Stage IV emissions
• Does not require Diesel Exhaust Fluid (DEF)
• Does not utilize Diesel Particulate Filter (DPF)
• Large displacement engine produces 74hp / 295ft-
lbs torque
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