________________________________________________________________________________________
| Home / Farm Tractors / Mahindra Tractors / Mahindra 3550 |
Mahindra 3550 Troubleshooting
The
Mahindra 3550 utility tractor was manufactured between 2015 and 2019. The
Mahindra 3550 tractor is powered by four-cycle four-cylinder direct injection
liquid-cooled diesel engine. A 166.7 cubic inches (2.7 L) engine has a cylinder
bore of 3.5" (89 mm), piston stroke of 4.33" (110 mm), and rated power of 49 hp
(36.5 kW). The Mahindra 3550 is fitted with a 2 transmission options: 12x12 full
synchromesh transmission, or three-range hydrostatic transmission. The maximum
forward speed - 15.3 mph (24.5 km/h), maximum reverse speed - 14.4 mph (23
km/h).
The open center hydraulic system includes a gear pump with rated fluid flow of 11.0 gal/min (41.6 l/min). The main relief pressure is 200 bar (2900 psi). The tractor is equipped with a hydrostatic power steering system, wet disc brakes, 31x13.50-15 front tyres, and 21.5L-16.1 rear tyres. The tractor is compatible with Mahindra 3550L front end-loader with a maximum lift height of 111.5" (2830 mm), and Mahindra 50B backhoe with maximum digging depth of 115" (2920 mm).
| Diesel Engine Troubleshooting |
| Engine starts up hard or doesn't start |
Air in the fuel pipes - Bleed the fuel pipes.
Fuel filter element is clogged - Replace the filter element.
Defective or clogged injection nozzle - Replace injection nozzles.
Water in the fuel system - Change fuel and repair fuel system.
Incorrect valve clearance - Correct valve clearance.
Fuel injection pump is not operating properly - Replace or repair injection pump.
| Engine starts and stalls suddenly |
Restricted intake air - Change air filter element.
Fuel filter plugged - Replace the filter element.
Fuel injection pump leakage - Check the fuel injection pump for leaks and fix it.
Dirty or defective injectors - Replace fuel injectors.
Fuel injection pump is not operating properly - Rebuild or change fuel pump.
| Engine stops running suddenly |
Coolant temperature is low - Engine is not warmed up to the required temperature.
Fuel filter element is dirty - Replace the filter element.
Air in the fuel pipes - Bleed the fuel pipes.
Clogged or defective injection nozzles - Clean or replace injection nozzles.
Fuel injection pump timing is wrong - Adjust as recommended.
| Engine stalls while idling |
Incorrectly set low idle speed - Normalize low idle speed.
Fuel injection pump malfunction - Repair or install a new fuel pump.
Fuel injectors are dirty or defective - Clean or replace fuel injectors.
Valve clearance is wrong - Adjust valve clearance according to specifications.
| Engine power is insufficient |
Clogged air filter element - Carry out maintenance on air filter.
Defective injection nozzle - Replace injection nozzles.
Incorrect fuel injection pressure - Check the fuel injection pressure and adjust if necessary.
The valve clearance is not adjusted - Adjust to proper valve clearance.
Incorrect low idle speed adjustment - Need to adjust idle speed.
Fuel lines or hoses are dirty - Clean fuel lines and hoses.
Worn cylinder head gasket - Change cylinder head gasket.
Damaged or leaking piston rings - Piston rings need to be replaced.
| Engine is overheated |
Insufficient coolant - Add coolant fluid and inspect the cooling system for leaks.
Engine oil insufficient - Fill up the oil to required level.
Dirty radiator core or faulty radiator cap - Change cap or clean radiator.
Fan belt slipping or worn - Change the fan belt.
Engine overload - Load reducing required.
| Insufficient oil pressure |
Engine oil insufficient - Fill up the engine oil.
Engine oil filter is plugged - Service or replace engine oil filter.
Oil grade or viscosity is wrong - Use correct viscosity oil.
Crankshaft bearing has incorrect oil clearance - Replace bearings.
Defective oil pump - Repair or replace.
| Abnormal engine knocking or noise |
Engine oil level low - Need to add engine oil.
Coolant temperature is low - Engine is not warmed up to the required temperature.
Fuel injection pump timing is wrong - Set up as recommended.
Incorrect low idle setting - Adjust the low idle speed.
Damaged or clogged injectors - Test and replace fuel injectors if necessary.
Misaligned or faulty connecting rod - Align or change connecting rod.
Worn or scored pistons - Replace the pistons.
| Transmission Troubleshooting |
| Transmission oil pressure is low |
Transmission fluid insufficient - Need to add transmission fluid.
Transmission fluid filter is clogged (if fitted) - Replace or service transmission fluid filter.
Defective relief valve - Replace the valve.
| Transmission noise |
Lack of transmission fluid - Need to add transmission fluid.
Transmission oil is contaminated - Change the oil.
Defective gears or improper backlash - Replace defective gears or set backlash properly.
Worn or broken bearings - Faulty bearings should be replaced.
Worn or bent shift forks - Shift forks need to be changed.
Shaft splines are worn or stuck - Change the shaft.
| Difficulty shifting gears |
Worn or rusty gear shift linkage - Shift linkage need to be replaced.
Damaged or worn gear shift forks - Shift forks need to be replaced.
Worn out parts of the gearshift mechanism - Replace worn parts.
Clutch is out of adjustment or defective - Clutch needs to be adjusted or changed.
| Transmission oil leaks |
Transmission fluid level is high - Correct the fluid level.
Broken seals or gaskets - Install new components.
| Hydrostatic Transmission Troubleshooting |
| HST transmission noises |
Fluid is contaminated or fluid level is insufficient - Fill to required level or change the fluid.
Speed control linkage is worn or unadjusted - Adjust or install new linkage.
Defective relief valve - Change the valve.
Excessive loading - The load should be reduced.
Defective or worn transmission parts - After disassembly and inspection, replace defective components.
| Loss of power |
Lack of transmission fluid - Checking transmission fluid level and add if necessary.
Relief valve is stuck - Replace relief valve.
Speed control linkage is worn or unadjusted - Adjust or change linkage.
| Transmission fluid overheated |
Transmission fluid insufficient - Fill the transmission housing to proper fluid level.
Dirty transmission fluid filter element - Service or replace the transmission fluid filter.
Cooling components are clogged or damaged - Inspect all cooling components and replace or clean if necessary.
Transmission overloaded - The load should be reduced.
| Transmission oil leaks |
Damaged gaskets or seals - Seals and gaskets replacement required.
Transmission case internal pressure is too high - Change defective parts.
Oil drain pipe is plugged - Check pipe and service if necessary.
| Hydraulics Troubleshooting |
| Hydraulic oil pressure is low |
Insufficient hydraulic fluid - Checking hydraulic fluid level and add if necessary.
Hydraulic oil filter is clogged - Clean the hydraulic filter element or replace if necessary.
Hydraulic pump is defective - Replace or repair hydraulic fluid pump.
Hydraulic control valve block is out of adjustment - Control valve needs to be adjusted.
Broken hydraulic cylinder - Repair or replace hydraulic cylinder.
Leaks in hydraulic lines - Check the system and repair leaks.
| Hydraulic system is too hot |
Damaged main relief valve - Relief valve replacement required.
Wrong hydraulic fluid type - Pour the proper type of fluid.
Hydraulic oil is contaminated - Fill up with fresh hydraulic oil.
There is air in the hydraulic system - Bleed hydraulic system.
| 3-point hitch can't lift or lifts too slowly |
Excessive hitch loading - The load should be reduced.
Hydraulic oil level low - Checking hydraulic oil level and add if necessary.
Dirty hydraulic fluid filter - Hydraulic filter maintenance required.
Hydraulic pump malfunction - Replace or repair hydraulic fluid pump.
Main relief valve is damaged - Relief valve need to be replaced.
Damaged hydraulic control valve - Install a new valve or repair it.
Hydraulic cylinder not working - Change or repair hydraulic cylinder.
Suction line is disconnected or broken - Replace or connect correctly.
| Hitch won't drop or drops slowly |
Incorrect setting hydraulic control valve block - Set correctly.
Hydraulic cylinder failure - Replace or repair hydraulic cylinder.
The three-point hitch is not adjusted - Adjustment is required.
Damaged hitch cross shaft - Install a new shaft.
| Hitch drop or lift is jerky |
Air in hydraulic system - Bleed air from hydraulic system.
Hydraulic fluid contamination - Change hydraulic fluid.
Defective hydraulic pump - Replace or repair hydraulic fluid pump.
Hydraulic control valve block is damaged - Change or repair hydraulic valve.
Hydraulic cylinder is broken - Repair or replace hydraulic cylinder.
| Steering Troubleshooting |
| Steering is stiff |
Damaged or incorrectly assembled steering column - Replace steering column or assemble correctly.
Air in steering hydraulic system - Air-bleed steering system.
Incorrect toe-in - Adjust toe-in properly.
Tire pressure uneven - Inflate the tires correctly.
Steering pump stopped working - Check the hydraulic steering pump and change if necessary.
Steering pump control valve is stuck or faulty - Service or change control valve.
Lack of steering fluid - Need to add steering oil.
| Steering wheel has too much free-play |
Worn steering column coupling or shaft - Change faulty component.
Faulty steering pump - Check the hydraulic steering pump and change if necessary.
Steering linkage parts are loose or worn - Repair or replace steering linkage.
| Tractor pulls to left or right |
Uneven wear on front tyres - Replace the tyres.
Improper toe-in - Check toe-in and correct.
Steering linkage parts are loose or worn - Repair or change steering linkage.
Improperly adjusted or defective front wheel bearings - Adjust correctly or replace bearings.
| Electrical Troubleshooting |
| Battery cannot be charged |
Wiring connections are loose or corroded - Clean or tighten connections.
Faulty battery terminal clamps - Change terminal clamps.
Faulty cell in battery - Install a new battery.
Belt is loose or defective - Adjust belt tension or change the belt.
| Starter motor turns slow |
Low battery power - Recharge the battery.
Battery runs out quickly - Battery needs to be serviced or replaced.
Disconnected wiring or bad battery terminals - Check cable connections and change or clean terminals.
| Starter does not work |
Battery is drained or worn - Need to charge or replace the battery.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Low battery output - Low battery charging, charge as required.
Starter motor failing - Repair or install a new starter.
________________________________________________________________________________________
________________________________________________________________________________________
| Farm Tractors Technical Specifications |