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Mahindra 6500 Troubleshooting

The Mahindra 6500 utility tractor was manufactured between 2002 and 2008. The Mahindra 6500 tractor is powered by NE465 4-cycle vertical 4-cylinder direct injection naturally aspirated diesel engine. A 216.1 cubic inches (3.5 L) engine has a cylinder bore of 3.7" (94 mm), piston stroke of 4.53" (115 mm), and rated power of 65 Hp (48.4 kW). The Mahindra 6500 is fitted with a 2 transmission options: 8x2 constant mesh transmission, or 8x8 synchomesh shuttle transmission.

The maximum forward speed - 19.2 mph (30.9 km/h), maximum reverse speed - 19.5 mph (31.4 km/h). The open center hydraulic system includes a gear pump with rated fluid flow of 11 gal/min (41.7 l/min). The tractor is equipped with a hydrostatic power steering, dry (2WD) or wet (4WD) disc brakes, 9.5Lx15 (2WD) or 11.2x24 (4WD) front tyres, and 16.9x28 (2WD) or 16.9x30 (4WD) rear tyres. The tractor is compatible with Mahindra ML260 front end-loader with a maximum lift height of 125" (3170 mm), or Mahindra ML265 front end-loader with a maximum lift height of 129" (3270 mm).

Engine Troubleshooting
Engine difficult to start or will not start

Air in the fuel pipes - Bleed the fuel pipes.
Clogged fuel filter - Replace the filter element.
Faulty fuel injection nozzles - Change fuel injection nozzles.
Water or dirt in fuel system - Drain, flush, and service the system.
Valve clearance is not correct - Need to adjust valve clearance.
Fuel injection pump damage - Change or repair the pump.

Diesel starts but then stops

Intake air restriction - Clean or change.
Fuel filter element clogging - Change filter element.
Fuel injection pump is leaking - Repair any leaks.
Damaged or clogged injectors - Inspect fuel injectors and change as required.
Damaged fuel injection pump - Repair or change injection pump.

Engine stops unexpectedly during operation

Engine has not warmed up to the recommended temperature - Normalize the temperature by warming up the engine.
Fuel filter element is clogged - Service the filter.
Air trapped in fuel system - Bleed air.
Fuel injection nozzles are damaged or dirty - Clean or change injection nozzles.
Fuel injection pump timing is not adjusted - Set the fuel pump timing correctly.

Engine stalls while idling

Incorrect low idle setting - Need to adjust idle speed.
Fuel injection pump is faulty - Rebuild or change fuel pump.
Fuel injector fault - Change or clean fuel injectors.
Valve clearance is not correct - Adjustment procedure required.

Diesel engine is losing power

Air filter plugged - Air filter maintenance required.
Dirty or faulty injection nozzles - Install a new kit of correctly balanced nozzles.
Fuel injection pressure is wrong - Check the fuel injection pressure and adjust if necessary.
Valve out of adjustment - Check and adjust.
Improperly adjusted low idle speed - Test and adjust.
Restricted fuel lines or hoses - Clean fuel system lines and hoses.
Defective cylinder head gasket - Replace the gasket as required.
Piston rings are leaking or defective - Piston rings need to be replaced.

Engine is overheated

Insufficient coolant fluid - Refill to the correct level and inspect system for leaks.
Engine oil level is low - Fill up the engine oil.
Dirty radiator fins or faulty radiator cap - Clean radiator or replace cap.
Damaged or worn fan belt - Belt change is required.
Diesel engine overloaded - Reduce load on the engine.

Oil pressure too low

Oil level is low - Fill the crankcase with oil.
Dirty oil filter - Replace or service engine oil filter.
Incorrect oil viscosity - Fill up with the proper oil viscosity.
Crankshaft bearing has incorrect oil clearance - Replace bearings.
Oil pump failure - Repair or change.

Abnormal engine noise or knocking

Insufficient engine oil - Fill up the oil to required level.
Coolant temperature is low - Warm up to required temperature.
Improper setting of fuel injection pump timing - Set the fuel pump timing correctly.
Low idle speed setting is not correct - Test and adjust.
Damaged or clogged injectors - Inspect fuel injectors and change as required.
Connecting rod is misaligned or worn - Align or replace connecting rod.
Scored or worn pistons - Replace the pistons.

Transmission Troubleshooting
Low transmission pressure

Transmission oil insufficient - Check transmission oil level and add oil as required.
Dirty transmission fluid filter element (if equipped) - Clean or change transmission fluid filter.
Relief valve is stuck - Change relief valve.

Transmission noise

Lack of transmission fluid - Need to add transmission fluid.
Transmission oil is contaminated - Fill up with fresh transmission oil.
Gears are defective or backlash is improper - Change worn gears or adjust backlash correctly.
Bearings are damaged or worn - Faulty bearings should be replaced.
Worn or bent gear shift forks - Install new shift forks.
Damaged or worn shaft splines - Install a new shaft.

Hard shifts

Stuck or worn gear shift linkage - Install a new gear shift linkage.
Worn or bent shift forks - Change the shift forks.
Worn gear shifting mechanism - Repair or change worn components if necessary.
Worn or improperly adjusted clutch - Adjust or replace the clutch.

Transmission fluid leakage

Transmission fluid level is high - Correct the fluid level.
Seals or gaskets are broken - Install new components.

Hydraulic System Troubleshooting
Low hydraulic system pressure

Hydraulic fluid is insufficient - Checking hydraulic fluid level and add if necessary.
Clogged hydraulic fluid filter element - Replace hydraulic filter element or service if necessary.
Defective hydraulic pump - Repair or replace hydraulic fluid pump.
Incorrect adjusted hydraulic control valve - Adjust correctly.
Hydraulic cylinder is broken - Install a new hydraulic cylinder or repair it.
Leaks in hydraulic pipes - Inspect hydraulic system for leaks and repair it.

Hydraulic system overheats

Main relief valve malfunctioning - Relief valve replacement required.
Improper type of hydraulic oil - Use the proper type of oil.
Hydraulic fluid contamination - Change hydraulic fluid.
Air in the hydraulic system - Air bleeding.

Hitch can't lift or lifts too slowly

Hitch is under excessive load - Reduce the load is required.
Insufficient hydraulic fluid - Fill the system to proper hydraulic fluid level.
Dirty hydraulic oil filter element - Service or replace the hydraulic filter.
Hydraulic pump is faulty - Replace or repair hydraulic oil pump.
Defective main relief valve - Change relief valve.
Defective hydraulic control valve block - Repair or replace the valve.
Hydraulic cylinder not working - Repair or replace hydraulic cylinder.
Suction pipe is loose or broken - Repair or replace pipe.

Hitch won't drop or drops slowly

Incorrect adjusted hydraulic control valve - Adjust correctly.
Defective hydraulic cylinder - Install a new hydraulic cylinder or repair it.
3-point hitch is out of adjustment - Adjustment is required.
Lift arm shaft is worn - Install a new shaft.

Hitch lift or drop is not smoothly

Air trapped in hydraulic system - Bleed air from system.
Dirty hydraulic oil - The oil must be changed.
Hydraulic pump is faulty - Install a new hydraulic oil pump.
Hydraulic control valve block is damaged - Install a new valve or repair it.
Defective hydraulic cylinder - Install a new hydraulic cylinder or repair it.

Steering Troubleshooting
Steering wheel is hard to turn

Worn or incorrectly fitted steering column - Replace the steering column or refit it correctly.
Air in the hydraulic steering system - Need to bleed air.
Not adjusted toe-in - Adjust toe-in wheels.
Uneven wear on front tires - Replace the tires.
Defective hydraulic steering pump - Check the steering pump and replace if necessary.
Worn or stuck pump flow control valve - Change or flush control valve.
Not enough steering fluid - Fill up steering fluid to required level.

Excessive play in steering

Worn steering column coupling or shaft - Replace faulty part.
Steering pump is worn - Install a new steering pump.
Loose or worn steering linkage parts - Replace or repair steering linkage.

Front wheels wander to left or right

Uneven wear on front tires - Replace the tires.
Not adjusted toe-in - Adjust toe-in properly.
Steering linkage parts are loose or worn - Check and replace as required.
Improperly adjusted or defective front wheel bearings - Adjust correctly or change bearings.

Electrical System Troubleshooting
Battery is not charging

Electrical wire connections are corroded or loose - Tighten or service connections.
Faulty electrical terminal connectors - Terminal connectors should be replaced.
Worn-out battery - Install a new battery.
Belt is damaged or loose - Change belt or adjust belt tension.

Starter turns slowly

Low battery output - Battery needs to be recharged.
Battery runs out quickly - Battery needs service or replacement.
Disconnected wires or corroded battery terminals - Check cable connections and replace or service terminals.

Starter will not crank

Battery is low or faulty - Battery needs to be recharged or replaced.
Wiring harness is disconnected or improperly connected - Check wiring harness and connect as required.
Battery capacity is low - Low battery charging, charge as required.
Faulty starter motor - Change or repair starter.



Farm Tractors Technical Specifications
JD 1026R JD 3650 JD 6400 JD 7810
FORD 1320 FORD 2810 FORD 3930 FORD 5600
MF 250 MF 690 MF 3060 MF 6180
NH TC48DA NH M100 NH T7550 NH 8560
CASE IH 495 CASE IH 1255XL CASE IH 2140 CASE IH 2294