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John Deere 855 Troubleshooting

John Deere 855 Diesel Engine Troubleshooting

Diesel hard to start or doesn't start: Fuel filter element is dirty. Install new filter element. Air in fuel tank. Bleed fuel tank. Fuel injection nozzles are dirty or defective. Check and replace nozzles if required. Fuel injection pump is not operating properly. Change pump or rebuild it.

Engine shuts off suddenly during operation: Incorrect adjustment of fuel injection pump timing. Use the correct fuel injection pump timing adjustment. Fuel filter element is clogged. Replace the filter element. Coolant temperature is low. Warm up to required temperature.

Engine starts and then shuts off: Dirty fuel filter. Replace filter element. Fuel injection pump is broken. Repair or change injection pump. Intake air restriction. Air filter maintenance required.

Engine overheated: Radiator core is clogged or radiator cap is leaking. Clean radiator or install new cap. Lack of engine coolant. Add coolant and check the components of cooling system. Fan belt is worn or faulty. Belt replacement is recommended. Low engine oil level. Add oil to the engine crankcase.

Engine loses power: Fuel injection nozzles are damaged. Service or change injection nozzles. Dirt in the fuel hoses or lines. Clean fuel system hoses and lines. Air filter plugged. Carry out maintenance on air filter. Cylinder head gasket defective. Install a new gasket.

Engine knocking or noise: Low coolant temperature. Normalize the temperature by warming up the engine. Low engine oil level. Add oil to the engine crankcase. Improper setting of fuel injection pump timing. Adjust fuel injection pump as required. Pistons are scored or worn. Pistons need to be replaced. Connecting rod is worn or not aligned. Connecting rod needs to be replaced or aligned.

Engine stops at idle: Incorrectly adjusted low idle speed. Adjust low idling as recommended. The valve clearance is not adjusted. Need to adjust valve clearance. Fuel injection pump is not working correctly. Repair or install new pump.

Oil pressure is low: Low crankcase oil level. Add oil to the engine crankcase. Oil pump is worn or damaged. Inspect and change as required. Oil filter element is dirty. Change or service engine oil filter.

John Deere 855 Hydrostatic Transmission Troubleshooting

HST transmission is making noise: Speed control linkage is defective or unadjusted. Adjust or repair linkage. Transmission overload. Reduce loading. Transmission fluid is dirty or fluid level is too low. Top up to proper level or change transmission fluid. Defective relief valve. Change the valve. Worn or defective parts of the hydrostatic transmission. Replace or repair defective components.

Hot transmission oil: Transmission overload. Reduce loading. Defective or plugged cooling components. Inspect all cooling components and service or replace if necessary. Transmission fluid level is low. Fill the transmission housing to proper fluid level. Dirty transmission fluid filter element. Replace or service transmission fluid filter.

Power is insufficient: Transmission oil insufficient. Check transmission oil level and add oil as required. Relief valve malfunction. Change relief valve. Speed control linkage is defective or unadjusted. Adjust or change linkage.

Transmission oil leaking: Clogged oil drain line. Clean or replace drain line. Damaged gaskets or seals. Seals and gaskets replacement required. High internal transmission housing pressure. Change defective components.

John Deere 855 Hydraulics Troubleshooting

Hydraulic system overheating: Hydraulic fluid type is wrong. Use correct type of hydraulic fluid. Hydraulic oil contamination. Change the oil. Air in hydraulic pipes. Bleed hydraulic pipes. Main relief valve is faulty. Relief valve must be changed.

Low hydraulic oil pressure: Hydraulic oil level low. Fill the system to proper hydraulic oil level. Clogged hydraulic fluid filter. Service the hydraulic filter or change if required. Leaks in hydraulic pipes. Check the hydraulic system and fix leaks. Incorrect adjusted hydraulic control valve. Adjust correctly. Hydraulic pump is faulty. Replace or repair hydraulic fluid pump. Damaged hydraulic cylinder. Repair or change hydraulic cylinder.

3-point hitch cannot be raised or raising is too slowly: Faulty hydraulic pump. Repair or replace hydraulic fluid pump. Damaged main relief valve. Relief valve need to be replaced. Defective hydraulic spool valve block. Repair or replace the valve. Hydraulic cylinder malfunction. Replace or repair hydraulic cylinder. Insufficient hydraulic oil. Need to add oil. Clogged hydraulic oil filter. Clean the hydraulic filter element or replace if necessary. Excessive loading on the hitch. The load should be reduced.

Hitch cannot be lowered or lowering is too slowly: Hydraulic cylinder is faulty. Repair or install a new hydraulic cylinder. Hydraulic control valve is out of adjustment. Need to make adjustment. Worn lift arm shaft. Install a new shaft. Three-point hitch is out of adjustment. Need to make adjustments.

Hitch drop or lift is jerky: Hydraulic oil is contaminated. Fill up with fresh hydraulic oil. Hydraulic pump is faulty. Repair or replace hydraulic oil pump. Air in hydraulic pipes. Bleed hydraulic pipes. Damaged hydraulic spool valve. Install a new valve or repair it. Broken hydraulic cylinder. Repair or replace hydraulic cylinder.

John Deere 855 Steering Troubleshooting

Excessive steering wheel free play: Worn steering column shaft or coupling. Change faulty component. Steering pump not working. Replace or repair steering pump. Loose or worn steering linkage components. Repair or change steering linkage. Steering control valve is damaged or worn. Change or repair steering control valve if required.

Difficult steering: Air lock in hydraulic steering system. Bleed the steering system. Steering filter is dirty. Clean or replace filter element. Steering fluid level is insufficient. Add oil to steering system. Steering control valve has malfunction or wear. Inspect and replace as required. Steering pump is faulty. Steering pump needs to be replaced or repaired. Steering pump control valve is stuck or worn. Service or change control valve. Improperly assembled or defective steering column. Reassemble or change the steering column. Uneven tyre pressure. Inflate the tyres properly. Improper toe-in. Adjust toe-in properly. Steering cylinder leaks. Replace worn cylinder seals or scratched piston rod.

Front wheels wander to left or right: Steering control valve is worn or defective. Inspect and change as required. Steering cylinder is defective. Repair or replace hydraulic steering cylinder. Improper toe-in. Check toe-in and correct. Loose or worn steering linkage components. Change or repair steering linkage. Front wheel bearings are defective or improperly adjusted. Adjust correctly or replace bearings. Uneven tyre pressure. Inflate the tyres properly.

John Deere 855 Electrical Troubleshooting

Battery cannot be charged: Loose or corroded cable connections. Tighten or service cable connections. Defective battery terminal connectors. Terminal connectors need to be changed. Defective battery. Battery change required. Defective or loose belt. Belt needs to be adjusted or changed.

Starter turns slow: Low battery power. Charge the battery. Battery will not hold charge. Service or replace the battery. Faulty battery terminals or disconnected cables. Connect cables properly or replace terminals.

Starter is not working: Battery is drained or worn. Charge or change the battery. Wiring is improperly connected or disconnected. Check wiring and connect properly. Low battery capacity. Battery is drained, recharge it. Starter motor is damaged. Starter needs to be replaced.

JOHN DEERE TRACTORS ATTACHMENTS
1023E	2025R	2210	2520	3032E
3046R	3520	4066R	4105	4200
4320	4400	4520	4600	4720
430	420	455	X300	X350
X485	X500	X590	X700	X738

JOHN DEERE TRACTORS TROUBLESHOOTING
2640	3040	3310	3650	4100
5050D	5090R	5410	6105R	7200R
E130	L111	LA110	LT155	X300R