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John Deere 1550 Troubleshooting
The
John Deere 1550 is a 2-wheel drive or 4-wheel drive utility tractor. This model
was manufactured from 1987 to 1994. The JD 1550 tractor is powered by 179.4
cubic inches (2.9 L) John Deere 3179DL 4-cycle three-cylinder liquid cooled
diesel engine with a maximum power of 43.4 Hp (32.4 kW) and 152 Nm (112.5 lb-ft)
of max torque at 1500 rev/min.
The John Deere 1550 is fitted with 3 transmission options:
8x4 synchromesh transmission, 16x8 partial powershift transmission, or 12x8
creeper transmission.
The maximum speed (forward/reverse): 18 mph (29
km/h) and 9.6 mph (15.4 km/h).
The closed center hydraulic system includes a
variable displacement pump with a flow of 5.8 gpm (22 lpm). The hydraulic
pressure is 190 bar (2755 psi). The 2-wheel drive models are equipped with
6.50x16 front tires and 12.4x36 rear tires. The 11.2x24 front tires and 14.9x28
rear tires are used for tractors with 4-wheel drive. The wheelbase is 80.7"
(2040 mm) for models with 2WD (4x2) and 81" (2050 mm) for models with 4WD (4x4).
| Engine Troubleshooting |
| Diesel won't start or hard to start |
| Plugged fuel filter - Change the filter element |
| The fuel shut-off valve is closed - Open fuel shut-off valve |
| Air trapped in fuel system - Bleed air |
| Clogged or damaged injectors - Test fuel injectors and change if necessary |
| Fuel injection pump is broken - Repair or replace injection pump |
| Bad compression - Check cylinder block and replace damaged components |
| Diesel shuts off during operation |
| Engine not warmed up - Warm up engine as required |
| Fuel lines leaking air - Tighten clamps, change faulty pipes |
| Bad fuel injection - Check and adjust |
| Fuel filter is dirty - Clean the filter element |
| Fuel injectors are clogged or faulty - Check fuel injectors and replace if required |
| Diesel starts and then stalls |
| Timing of fuel injection pump is wrong - Repair or replace fuel injection pump |
| Fuel filter clogging - Clean the filter or install new filter element |
| Fuel injector nozzles are dirty or defective - Service or replace nozzles if required |
| Faulty fuel injection pump - Change pump or rebuild it |
| Air cleaner is clogged - Change or service air cleaner element |
| Engine stops at low idle speed |
| Wrong adjustment of low idle speed - Need to adjust idle speed |
| Fuel injection pump damage - Install a new fuel pump or repair |
| Fuel injector nozzles are clogged or faulty - Install new set of properly balanced nozzles |
| Improper valve clearance - Adjust to proper valve clearance |
| Not enough coolant - Refill to the correct level. Check and repair damage to the cooling system if required |
| Cooling system is clogged or cooling components are defective - Flush cooling system or replace faulty parts |
| Engine oil level is low - Check and refill engine oil |
| Fan belt tension is not adjusted or belt is worn - Adjust belt tension properly or change it |
| Thermostat failure - Test thermostat opening temperature, replace as required |
| Clogged or damaged injectors - Service or change fuel injectors |
| Incorrect fuel injection pressure - Test fuel injection pressure and adjust it correctly |
| Air filter is clogged - Clean or replace the air filter element |
| Clogged oil filter element - Change or clean engine oil filter element |
| Engine is running overloaded - Reduce load or shift to lower gear |
| Valve clearance is out of adjustment - Correct valve clearance needs to be set |
| Improperly adjusted low idle speed - Adjust as required |
| Fuel pipes or hoses are clogged - Fuel pipes and hoses need to be cleaned |
| Insufficient engine compression: Valves are broken or leaking - Valves need to be replaced |
| Engine knocking sound or abnormal noise |
| Fuel injection pump timing is incorrect - Repair or replace fuel injection pump |
| Fuel injector nozzles are faulty - Change injector nozzles |
| Engine oil level is insufficient - Need to add engine oil |
| Coolant temperature is low - Warm up the engine |
| Worn main bearings or crankshaft - Install new parts |
| Stuck or worn piston rings - Replace piston rings |
| Flywheel screws are loose - Tighten the screws firmly |
| Engine consuming too much oil |
| Oil leaking: Seals or gaskets are wearing excessively - Replace defective parts |
| Oil viscosity is incorrect - Use oil of proper viscosity |
| Stuck or worn piston rings - Change piston rings |
| Damaged valve stems or valve guides - Install new valves |
| Scuffed cylinder liners or pistons - Inspect pistons and liners, change as required |
| Electrical System Troubleshooting |
| Battery does not charge |
| Battery faulty cell - Replace the battery |
| Battery electrical wire harness failure - Inspect wires for defects, change or repair |
| Battery cables and terminals are corroded or loose - Tighten or clean terminals and cables |
| Defective belt or improperly adjusted belt tension - Change belt or adjust belt tension properly |
| Low battery output voltage - Battery needs to be recharged |
| Battery is not holding charge - Service charging system or replace battery |
| Damaged battery wiring harness - Inspect wiring for damage, replace or repair |
| Battery terminals and cables are loose or corroded - Tighten or clean terminals and cables |
| Battery capacity is low - Recharge the battery |
| Drained or defective battery - Charge or change the battery |
| Starter motor is damaged - Repair or replace starter |
| Wiring is improperly connected or disconnected - Need to reconnect the wiring properly |
| Transmission Troubleshooting |
| Gear shift is hard |
| Misadjusted or defective clutch - Adjust or replace the clutch |
| Gear shift linkage is damaged or loose - Service or replace shift linkage |
| Shift forks are worn or damaged - Install new shift forks |
| Gearshift mechanism failure - Change or repair failed components |
| Insufficient transmission oil pressure |
| Low transmission oil level - Check transmission oil level and add oil as required |
| Clogged transmission fluid filter element (if fitted) - Replace or clean transmission fluid filter |
| Relief valve sticking - Replace relief valve as required |
| Excessive transmission noise |
| Broken or worn bearings - Change the bearings |
| Fluid level is low - Fill the transmission housing with fluid |
| Dirty transmission fluid - Change transmission fluid |
| Gears are defective or backlash is incorrect - Replace gears or set backlash correctly |
| Bent or worn shift forks - Replace the shift forks |
| Seals or gaskets are damaged - Install new seal or gaskets |
| Cracked transmission case - Install a new transmission case |
| Hydraulics Troubleshooting |
| Hydraulic system overheated |
| Hydraulic system pressure is not adjusted correctly - Correct adjustment is required |
| Main relief valve failure or incorrect setting - Adjust the valve or replace if necessary |
| Dirty hydraulic fluid - The fluid must be changed |
| Air enters in hydraulic system - Inspect the suction line, pump seals, and fittings |
| Low hydraulic oil pressure |
| Hydraulic oil level is low - Check oil level and add hydraulic oil as required |
| Hydraulic fluid filter clogging - Service or replace the hydraulic filter |
| Damaged hydraulic oil pump - Check pump capacity and change if necessary |
| Hydraulic control valve is defective or set improper - Set correctly or replace |
| Hydraulic cylinder is broken - Inspect the cylinder components for damage or wear and change if required |
| Hydraulic piping leaks - Identify leaks in the system and repair it |
| 3-point hitch lifts too slowly or can't lift |
| Not enough hydraulic fluid in the system - Check and refill the hydraulic fluid |
| Cold oil in hydraulic system - Wait for oil to warm up |
| Dirty hydraulic oil filter - Hydraulic filter maintenance required |
| Faulty hydraulic oil pump - Test pump performance and replace pump if necessary |
| Main relief valve malfunction or incorrect adjustment - Replace or set up the relief valve |
| Hydraulic control valve block is not set properly or defective - Replace or adjust correctly |
| Hydraulic cylinder malfunction - Check cylinder parts for wear or damage and replace if necessary |
| Damaged or disconnected hydraulic suction pipe - Connect or replace the pipe |
| Hitch does not lower or lowers very slowly |
| Hydraulic spool valve is defective or set improper - Adjust properly or replace |
| Hydraulic cylinder is broken - Inspect the cylinder components for damage or wear and change if required |
| Lift arm shaft is damaged - Install a new shaft |
| The hitch has any internal mechanical damage - Replace worn or defective hitch components |
| Hitch is lowered or raised jerkily |
| Aeration in hydraulic system - Inspect the pump seals, suction pipe, and fittings |
| Hydraulic fluid contamination - Change hydraulic fluid |
| Faulty hydraulic oil pump - Flow-rate hydraulic pump and replace pump if necessary |
| Hydraulic spool valve block is defective or set improper - Set properly or replace |
| Hydraulic cylinder failure - Check the cylinder components for damage or wear and change if necessary |
| Steering System Troubleshooting |
| Steering wheel is very heavy to turn |
| Defective or incorrectly installed steering column - Reinstall the steering column or change it |
| Air in steering system - Bleed the steering system |
| Incorrect toe-in - Adjust toe-in correctly |
| Incorrect tire pressure - Inflate the tires correctly |
| Faulty steering pump - Replace or repair steering pump |
| Defective or worn hydrostatic steering unit - Inspect and change as required |
| Relief valve malfunction or sticking - Inspect relief valve and replace if necessary |
| Steering fluid insufficient - Check and refill steering fluid |
| Steering system has oil leaks - Retighten steering hose and line connections |
| Excessive steering wheel play |
| Worn steering column coupling or shaft - Replace faulty component |
| Worn or damaged hydrostatic steering unit - Replace or repair steering unit as required |
| Steering pump is faulty - Repair or replace steering pump |
| Steering tie-rod ends or linkage are defective - Replace failed component |
| Tractor is pulling to left or right |
| Tire pressure is improper - Inflate the tires properly |
| Improper toe-in - Check toe-in and correct |
| Steering linkage or tie-rod ends are worn - Change failed part |
| Defective or worn hydrostatic steering unit - Check and replace as required |
| Steering cylinder is worn - Change or repair hydraulic steering cylinder |
| Improperly adjusted or worn front hub bearings - Replace or adjust the bearings correctly |
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| Farm Tractors Technical Specifications |
