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ST7
Engine and Fuel System
1
ST 7 Safety
2
Always read and understand the Safety manual before operate or work with the Scooptram.
Powertrain
rear axle
driveline
Engine (powerpack) front axle
transmission Radiator (cooler) upbox
3
Engine / Powerunit Introduction / Specifications
Cummins Diesel engine QSB 6.7 Tier 3 – High Pressure Common Rail 300 – 1600bar – Rated power 144kW (193 BHP) @ 2200 rpm – Torque 931Nm (687 lb-ft) @ 1400 rpm – ECU – Engine Control Module. – Some rpm’s
Low idle:700,
Converter stall 1800
High idle:2300
– Engine oil (pan + filter): 17,5L
4
Engine / Powerunit Fuel system
5
Fuel flow
Fuel filter
Fuel tank
Fuel pump
Sensors
Injectors
Engine / Powerunit Fuel system
Fuel flow – 1. Fuel tank – 2. Primary Fuel filter – 3. Fuel pump – 4. Hand pump – 5. Secondary Fuel filter – 6. High pressure fuel pump – 7. High pressure common rail – 8. Engine injectors – 9. Check valve – 10. Return to tank
6
Engine / Powerunit Fuel system
7
Filter
Tank
Engine / Powerunit Engine oil system
8
How to fill, change and check oil level
Oil filter
Oil pump
Oil pressure switch
Oil cooler
Engine / Powerunit Engine oil system
How to check, change and fill engine oil
Oil filter
Engine oil can reach temperatures exceeding 104°C (220°F). Do not change oil immediately after engine shutdown. 9
Engine / Powerunit Engine oil system
Oil pump – Gear pump driven by the engine – Pumps oil throughout the whole engine
10
Engine / Powerunit Engine oil system
Oil pressure switch – Shows a constant pressure unless there’s too little oil in the system – Under 0,5 bar the low oil pressure warning will apear