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| Home / Farm Tractors / Mahindra Tractors / Mahindra 4025 |
Mahindra 4025 Troubleshooting
The
Mahindra 4025 utility tractor was manufactured between 2008 and 2019. The
Mahindra 4025 driveline consists of Mahindra MDI 2700 R2 4-cylinder direct
injection water-cooled diesel engine and 8x2 sliding mesh transmission. 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 41 hp (30.6 kW). The maximum forward speed
- 17.5 mph (28 km/h), maximum reverse speed - 11 mph (17.5 km/h).
The open center hydraulic system includes a gear pump with rated fluid flow of 8.3 gpm (31.4 lpm). The Mahindra 4025 is equipped with a hydrostatic power steering system, dry disc brakes, 6.00x16 (2WD) or 9.50x16 (4WD) front tyres, and 12.4x28 rear tyres. The tractor is compatible with Mahindra ML232 front end-loader with a maximum lift height of 116" (2940 mm), and Mahindra ANBH86 backhoe with maximum digging depth of 105" (2660 mm).
| Diesel Engine Troubleshooting |
| Engine starts hard or doesn't start |
Air in the fuel pipes - Bleed the fuel pipes.
Fuel filter element clogging - Clean the filter element.
Fuel injection nozzles are faulty or clogged - If necessary, replace with a new nozzle.
Water in the fuel system - Change fuel and repair fuel system.
The valve clearance is not adjusted - Adjust valve clearance.
Defective fuel injection pump - Change pump or rebuild it.
| Diesel starts but stalls suddenly |
Clogged air filter - Carry out maintenance on air filter.
Fuel filter plugging - Clean or change the filter.
Fuel injection pump is leaking - Repair any leaks.
Dirty or defective injectors - Change or clean fuel injectors.
Defective fuel injection pump - Replacement or repair required.
| Engine stops unexpectedly during operation |
Engine is not preheated - Warm up engine as required.
Fuel filter plugging - Filter maintenance required.
Air in fuel tank - Bleed fuel tank.
Fuel injection nozzles are clogged or faulty - Test injection nozzles and change if necessary.
Fuel injection pump timing is not adjusted - Adjust as recommended.
| Engine stops while idling |
Too low idle RPM - Adjustment required.
Fuel injection pump is not operating properly - Install a new fuel pump or repair.
Clogged or defective injectors - Clean or replace fuel injectors.
The valve clearance is not adjusted - Check and adjust as required.
| Engine loses power |
Air filter is clogged - Air filter maintenance required.
Clogged injection nozzle - Clean or replace injection nozzles.
Incorrect fuel injection pressure - Adjust to correct pressure.
The valve clearance is incorrect - Check and adjust.
Incorrectly set low idle speed - Adjustment required.
Fuel hoses or lines are clogged - Service fuel lines and hoses.
Cylinder head gasket is blown - Replace cylinder head gasket.
Defective or worn piston rings - Change piston rings.
| Engine overheated |
Engine coolant is insufficient - Add coolant and check the components of cooling system.
Engine oil insufficient - Check and refill engine oil.
Clogged radiator core or leaking radiator cap - Clean radiator or replace cap.
Fan belt slipping or worn - The fan belt needs to be replaced.
Engine is overloaded - Reduce the load or operate the tractor in lower gears.
| Low oil pressure |
Low crankcase oil level - Checking oil level and add if necessary.
Plugged engine oil filter - Replace or clean engine oil filter element.
Improper type of engine oil - Use correct viscosity oil.
Excessive crankshaft bearing oil clearance - Bearing needs to be changed.
Oil pump malfunction - Repair or change.
| Engine noise or knocking |
Insufficient engine oil - Fill up the oil to required level.
Coolant temperature is low - Warm up the engine.
Incorrect adjustment of fuel injection pump timing - Set the fuel pump timing correctly.
Low idle speed adjustment is incorrect - Adjust the low idle speed.
Fuel injectors are faulty or clogged - Clean or replace fuel injectors.
Connecting rod is not aligned or worn - Alignment procedure or replacement is required.
Pistons are worn or broken - Replace the pistons as required.
| Transmission Troubleshooting |
| Insufficient transmission fluid pressure |
Transmission fluid insufficient - Fill the transmission housing to proper fluid level.
Dirty transmission oil filter element (if equipped) - Clean or change transmission oil filter.
Relief valve malfunction - Install a new relief valve.
| Transmission noise |
Lack of transmission fluid - Need to add transmission fluid.
Transmission fluid contamination - Change the fluid.
Worn gears or incorrect backlash - Replace gears or adjust backlash correctly.
Worn or cracked bearings - Change faulty bearings.
Shift forks are bent or worn out - Shift forks need to be replaced.
Stuck or worn shaft splines - Change the shaft.
| Difficult to shift gears |
Gear shift linkage is corroded or worn - Install new shift linkage.
Worn or bent shift forks - Replace defective shift forks.
Defective parts in the gearshift mechanism - Replace defective parts.
Worn or unadjusted clutch - Clutch replacement or adjustment required.
| Transmission fluid leaking |
Too much fluid in transmission - Excess fluid must be drained.
Damaged gaskets or seals - Seals and gaskets need to be replaced.
| Hydraulics Troubleshooting |
| Low hydraulic oil pressure |
Hydraulic oil is insufficient - Need to add oil.
Hydraulic oil filter is clogged - Clean or change hydraulic filter.
Faulty hydraulic pump - Change or repair hydraulic fluid pump.
Incorrect adjusted hydraulic control valve - Adjust correctly.
Faulty hydraulic cylinder - Change or repair hydraulic cylinder.
Leaking hydraulic lines - Identify leaks in the system and repair it.
| Hydraulic system overheated |
Defective main relief valve - Install a new relief valve.
Incorrect hydraulic oil type - Use the correct type of hydraulic oil.
Hydraulic oil is contaminated - Fill up with fresh hydraulic oil.
Air in the hydraulic system - Air bleeding.
| 3-point hitch cannot be raised or raising is too slowly |
Excessive load on hitch - Reduce loading.
Insufficient hydraulic fluid - Checking hydraulic fluid level and add if necessary.
Clogged hydraulic fluid filter - Change the hydraulic filter element or service if required.
Hydraulic pump not working - Replace or repair hydraulic fluid pump.
Main relief valve is damaged - Change relief valve.
Damaged hydraulic spool valve - Repair or replace hydraulic valve.
Broken hydraulic cylinder - Replace or repair hydraulic cylinder.
Suction pipe is disconnected or broken - Connect or replace pipe.
| 3-point hitch won't lower or lowers slowly |
Hydraulic spool valve block is not adjusted properly - The spool valve should be properly adjusted.
Hydraulic cylinder is broken - Repair or replace hydraulic cylinder.
Three-point hitch is out of adjustment - Need to make adjustments.
Hitch cross shaft is damaged - Replace the shaft.
| Hitch lowering or lifting is jerky |
Air in hydraulic pipes - Bleed hydraulic pipes.
Hydraulic oil is contaminated - Fill up with fresh hydraulic oil.
Hydraulic pump not working - Change or repair hydraulic fluid pump.
Damaged hydraulic control valve - Repair or change the valve.
Hydraulic cylinder is defective - Replace or repair hydraulic cylinder.
| Steering Troubleshooting |
| Steering is difficult |
Incorrectly mounted or defective steering column - Mount the steering column correctly or replace it.
Air in the hydraulic steering system - Bleed the system of air.
Improper toe-in - Adjust toe-in wheels.
Uneven wear on front tyres - Replace the tyres.
Steering pump failure - Repair or change steering pump.
Stuck or worn pump flow control valve - Service or change control valve.
Lack of steering fluid - Need to add steering oil.
| Excessive steering wheel free play |
Steering column coupling or shaft has maximum wear - Replace defective part.
Worn steering pump - Check the hydraulic steering pump and change if necessary.
Steering linkage components are loose or worn - Inspect and change as required.
| Tractor pulls to right or left |
Uneven wear on front tires - Replace the tires.
Not adjusted toe-in - Adjust toe-in properly.
Steering linkage assembly is worn or loose - Repair or change steering linkage.
Worn or incorrectly adjusted or worn front wheel bearings - Install new bearings or adjust it correctly.
| Electrical System Troubleshooting |
| Battery will not charge |
Loose or corroded electrical wiring connections - Service or tighten connections.
Faulty battery terminal connectors - Terminal connectors need to be changed.
Battery bad cell - Battery change required.
Worn or loose belt - Belt needs to be adjusted or replaced.
| Starter turning slow |
Low battery voltage - Battery is drained, charge it.
Battery will not hold charge - Battery needs to be serviced or replaced.
Battery cables are disconnected or terminals are faulty - Check wire connections and change or service terminals.
| Starter does not work |
Battery is low or faulty - Replace or charge as required.
Battery cables are disconnected or incorrectly connected - Check cables and connect as needed.
Low battery capacity - Charge the battery.
Defective starter motor - Replace or repair starter.
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| Farm Tractors Technical Specifications |