John Deere 250GR Hydraulic Excavator Technical Manual VOL 1 OF 5 (TM1214A-IN2-1)

TABLE OF CONTENTS

Figure 5. Engine Lubrication System
Figure 6. Engine Oil Sampling Port
Figure 7 Typical Temperature Sensor Schematic
Figure 8. Typical Pressure Sensor Schematic
Table 1. Preheat/Reheat Times
Table 2 Engine Speed Catrol System Operation
Figure 9. Typical Alternator Operation
Figure IO. Starter Motor (Gear Reduction
Figure 11. Swing bEor Par* Brake Release
Figure 12. Crossover Relief Valve and Makeup Check Valve Operation
Figure 13. Center Joirit C)peration
Figure 14. Boom Reduced Leakage Valve C)peratim
Figure 15. Neutral and Power Passages Operation
Figure 16. Track Adjuster and Recoil Spring Assembly Operation
Figure 17. Track Shæ, Carrier Roller, and Lower Roller
Figure 18. Travel Gearbox Operation
Figure 19. Fuel System Operation
Figure 20
Fuel Tank and Tank
Figure 21. Primary Fuel Filtec
Figure 22
Lubricity Filter Operatin
Figure 23
Final Fuel Filter Operation
Figure 24. High-Pressure Fuel Pump Operation.
Figure 25
High-Pressure Common Rail Operation
Figure 26
NC”Ending Injection
Figure 27
Radiator, Hydraulic Oil Ccoer, And Intercooler Location
Figure 28
Fuel Cooler
Figure 29
Surge Tank Location