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4044, 4052, 4066 John Deere Tractors Troubleshooting
- 4044, 4052, 4066 Diesel Engine
- 4044, 4052, 4066 Service Engine
- 4044, 4052, 4066 Transmission
- 4044, 4052, 4066 Hitch
- 4044, 4052, 4066 Hydraulics and PTO
- 4044, 4052, 4066 Troubleshooting
4044M, 4044R, 4052M, 4052R, 4066M, 4066R John Deere Engine Troubleshooting
Engine Will Not Start or Is Hard to Start | PTO engaged. |
Engine throttle lever not pushed forward. | |
Fuel shutoff valve CLOSED (OFF). | |
Stale fuel, improper fuel, or fuel level. | |
Wrong engine oil viscosity. | |
Cold start system not being used, or malfunctioning. | |
Plugged fuel filter. | |
Plugged air intake filter. | |
Dirty or faulty fuel injectors. | |
Blown fuse. | |
Other electrical problem. |
Engine Will Not Start After a Stall | Wait at least 2 seconds and then retry. |
Engine Runs Rough or Stalls | Fuel shutoff valve partially closed. |
Plugged fuel filter. | |
Plugged air intake system. | |
Fuel cap vent dirty. | |
Faulty seat switch. | |
Stale fuel, improper fuel, or fuel level. | |
Dirty or faulty fuel injectors. | |
Low coolant temperature. | |
Fuel pump not functioning properly. |
Engine Overheats | Dirty grille, radiator screen, or radiator cooling fins. |
Plugged air intake filter. | |
Low coolant level. | |
Cooling system needs flushing. | |
Defective radiator cap. | |
Defective thermostat. | |
Defective water temperature indicator or sender. | |
Low oil level. | |
Loose or defective alternator belt. | |
Engine speed too low for load. Do not operate at low idle. | |
Operating at too fast ground speed for conditions. |
Engine Knocks | Engine oil level low. |
Injection pump out of time. | |
Low coolant temperature. | |
Engine overheating. | |
Idle speed too low. |
Engine Lacks Power | Exhaust filter restriction. |
Improper type of fuel. | |
Plugged air intake system. | |
Plugged fuel filter. | |
Engine overheating. Operating at too fast ground speed for conditions. | |
Engine oil viscosity too high. | |
Low coolant temperature. | |
Improper valve clearance. | |
Dirty or faulty fuel injectors. | |
Injection pump out of time. | |
Implement improperly adjusted, causing drag on machine. | |
Rate-of-drop valve closed, causing hydraulic load on engine. |
Low Oil Pressure | Engine oil level low. |
Plugged oil filter. | |
Improper type of oil. | |
Oil leaks. |
Engine Uses Too Much Oil | Find and correct oil leaks. |
Incorrect engine oil. | |
Plugged air intake filter. |
Engine Emits White Smoke | Improper type of fuel. |
Low engine temperature. | |
Defective thermostat. | |
Engine out of time. |
Engine Emits Black or Gray Exhaust Smoke | Improper type of fuel. |
Plugged air intake system. | |
Operating at too fast ground speed for conditions. | |
Dirty or faulty fuel injectors. | |
Engine out of time. |
High Fuel Consumption | Improper type of fuel. |
Plugged air intake system. | |
Operating at too fast ground speed for conditions. | |
Improper valve clearance. | |
Dirty or faulty fuel injectors. | |
Engine out of time. | |
Implement improperly adjusted, causing drag on machine. | |
Low engine temperature. | |
Restricted air intake system. | |
Plugged crankcase vent tube or baffle. | |
Brakes dragging. |
Electrical System Troubleshooting
Battery Will Not Charge | Check to ensure 2-pin connector on alternator is plugged in properly. |
Loose or corroded connections. | |
Check for a blown fuse. | |
Loose or defective alternator belt. | |
Dead cell in battery. | |
Defective battery—check electrolyte level (if applicable). | |
Defective alternator. |
Battery Discharge Indicator Stays On With Engine Running | Low engine speed. |
Check to ensure 2-pin connector on alternator is plugged in properly. | |
Check for a blown fuse. | |
Loose or defective alternator belt. | |
Defective battery. | |
Defective alternator. |
Starter Will Not Work | Loose or corroded battery connections. |
Blown fuse. | |
Low battery output—check electrolyte level (if applicable). | |
Key switch or starter faulty. | |
PTO engaged. | |
Check for active fault codes. |
Starter Turns Slowly | Low battery output—check electrolyte level (if applicable). |
Low battery power—charge battery. | |
Engine oil viscosity too heavy. | |
Loose or corroded battery connections. |
Light Circuit Not Working | Fuse blown. |
Cruise Control Does Not Engage or Shuts Off | Adjust service brake switch. |
Heater and Air Conditioning System Troubleshooting
All Cab Electrical Switches Do Not Work | Loose, defective or blown fusible link. |
Blower Malfunctioning | Blown fuses. |
Blower does not work. |
Blower Operates Only in High Position | One of two fuses blown. |
Blown blower resistance assembly. |
Heater Does Not Work | Low coolant level. Check coolant level; add if necessary. |
Faulty thermostat. | |
Heater control valve not functioning properly. | |
Heater core or hoses clogged or damaged. Flush cooling system. | |
Replace heater core or hoses. |
Air Conditioning Does Not Work | Blown fuse. |
Faulty wiring or loose connections. | |
Fan belt loose or slipping. | |
Defective switch. | |
Defective compressor clutch. |
Drafts | Poor air distribution. Adjust directional air louvers. |
Set blower switch to medium or low position. |
Inadequate Air Flow | Clogged air filters. |
Evaporator core air flow restricted. | |
Faulty blower fan motors. | |
Defective blower switch. | |
Faulty wiring or loose connections. |
Water Leaking or Dripping from Evaporator Core Compartment | Loose hose clamp. |
Evaporator condenser pan dirty. | |
A/C drain tubes plugged. |
Strange Odors Inside Operator’S Cab | Dirty air filters. |
Evaporator condenser pan dirty. | |
A/C drain tubes plugged. | |
Tobacco smoke and tar on evaporator exterior. |
Partial Frosting and Sweating of Lines Combined with Poor Cooling | Fan belt slipping. |
Loss of refrigerant. | |
Restricted or clogged liquid line. | |
Expansion valve malfunctioning. |
Ice Flecks Blowing from Evaporator | Control dial set too low. Adjust temperature control to a warmer position. |
Failure to Cool | Insufficient blower speed. |
Dirty air filters. | |
Debris on front grille. | |
Lint or dirt on condenser fins. | |
Refrigerant is lost or extremely low. | |
Loose fan belt. | |
Compressor clutch not engaging. | |
Expansion valve not functioning. | |
Restriction in refrigerant system. | |
Faulty wiring or loose connections. | |
Defective temperature control switch. | |
Outside temperature too low, below 21C (70F). Wait until day gets warmer. | |
Condenser is overheating. Clean condenser screens, cores and fins of condenser and radiator. | |
Severe restriction in high side. | |
Burned out clutch field or faulty field. | |
Short circuit in control circuit or failure of a switch in circuit. |
Hissing Noise at Expansion Valve | Loss of refrigerant. |
Restriction in refrigerant system. | |
Check receiver-dryer for uniformity of temperature. |
4044, 4052, 4066 John Deere Machine Troubleshooting
Operation Sluggish, Slow | Suction side filter may need replacement. |
Poor Hydraulic Performance | Suction side filter may need replacement. |
Water in oil. |
Excessive Machine Vibration | Engine speed too slow. |
Machine Will Not Move with Engine Running | Electrical problems. |
Park brake locked. | |
Transmission oil level low. | |
Transmission oil cold - allow engine to warm. | |
Transmission range shift lever in neutral position. | |
Suction side filter may need replacement. | |
Operator not in seat. |
3-point Hitch Fails to Lift | Low oil level. |
Worn hydraulic pump. | |
Rate-of-drop valve closed. | |
Excessive load on hitch. | |
Hydraulic oil too cold. | |
Hydraulic oil suction filter plugged. |
3-point Hitch Lifts Slowly | Suction side filter may need replacement. |
Worn hydraulic pump. |
3-point Hitch Drops Slowly or Does Not Drop | Rate-of-drop valve closed. |
Rate-of-drop valve set too slowly. |
3-point Hitch Drops Too Fast | Rate-of-drop valve set too fast. |
Load too heavy. |
Noise Is Coming from PTO During Operation | Noise may occur at low engine speeds, increase to rated engine speed. |
Hitch Assist Disengages When Exiting the Tractor | Park brake is not fully engaged. |
4044M, 4044R, 4052M, 4052R, 4066M, 4066R Steering Troubleshooting
Steering Not Working | Suction side filter may need replacement. |
Improper tire inflation. | |
Low oil level. | |
Excessive play in steering. See your John Deere Dealer. | |
Worn hydraulic pump. |
- 4044, 4052, 4066 Diesel Engine
- 4044, 4052, 4066 Service Engine
- 4044, 4052, 4066 Transmission
- 4044, 4052, 4066 Hitch
- 4044, 4052, 4066 Hydraulics and PTO
- 4044, 4052, 4066 Troubleshooting
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