Service as Required Checking Fuses NOTE: The instrument panels for later electronically controlled engines as described in Section 17 do not have this fuse. Check fuse (A) located in fuse holder on face of instrument panel. If defective, replace with a 5-amp fuse. RG11938 –UN–06NOV01 A separate wiring harness fuse (10 amp) and a main system fuse (20 amp) are shown in the Wiring Diagrams in the Troubleshooting Section. On 4045HF475 and 6068HF475 engines, a separate wiring harness for glow plugs (not shown) has fuse protection. To replace fuse, remove cap from holder on jumper cable and replace with a 50-amp fuse. Early Engines with Electronic Instrument Panel Amp Fuse NOTE:
On 4045DF/TF 270 engines, refer to supplier’s instructions and diagrams for fuse location and type. OURGP11,000013C –19–21NOV03–1/1 Checking Air Compressors (If Equipped) Air compressors are offered as options with John Deere OEM engines to provide compressed air to operate air-powered devices like vehicle air brakes. Air compressors are engine-driven piston types. They are either air cooled or cooled with engine coolant. The compressors are lubricated with engine oil. The compressor runs continuously as gear or spline driven by the auxiliary drive of the engine but has “loaded” and “unloaded” operating modes.
This is controlled by the vehicle’s air system (refer to vehicle technical manual for complete air system checks and services). See your John Deere engine distributor or servicing dealer for diagnostic and troubleshooting information. If diagnosis leads to an internal fault in the compressor, replace the complete compressor as a new or remanufactured unit. RG12836 –UN–27FEB03 Air Compressor (Optional) OURGP12,00001E0 –19–26FEB03–1/1 40-11 021604 PN=184