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New Holland Workmaster 75 Troubleshooting

Workmaster 75 Engine Troubleshooting

Engine difficult to start or doesn't start: Fuel filter plugging. Replace filter element. There is air in the fuel system. Bleed the system. Damaged or dirty injection nozzles. Service or change injection nozzles. Fuel injection pump malfunction. Rebuild or change fuel pump.

Engine shuts off suddenly while running: Timing of fuel injection pump is incorrect. Adjust the pump as required. Fuel filter element is clogged. Change the filter element. Engine is not warmed up to the required temperature. Warm up engine as required.

Diesel starts but then stops: Fuel filter plugging. Change filter element. Fuel injection pump malfunctioning. Change pump or rebuild it. Air filter clogged. Clean or replace element.

Engine overheating: Clogged radiator core or damaged radiator cap. Clean radiator or replace cap. Coolant level is low. Fill radiator to proper level and check components for faults. Fan belt slipping or worn. If necessary, replace the belt. Insufficient engine oil. Need to add engine oil.

Diesel engine loses power: Fuel injection nozzles are damaged or dirty. Change fuel injection nozzles. Fuel hoses or lines are dirty. Clean fuel system hoses and lines. Dirty air filter. Change air filter element. Defective cylinder head gasket. Cylinder-head gasket replacement required.

Engine knocking sound or abnormal noise: Coolant temperature is low. Engine is not warmed up to the required temperature. Low engine oil level. Add oil to the engine crankcase. Fuel injection pump timing is wrong. Adjust fuel injection pump as required. Scored or worn pistons. Pistons need to be replaced. Connecting rod is worn or misaligned. Need to align or replace the connecting rod.

Engine stalls when idling: Too low idle RPM. Adjust low idle speed. Valve out of adjustment. Correct valve clearance needs to be set. Fuel injection pump damage. Change or repair the pump.

Insufficient oil pressure: Oil level is low. Checking oil level and add if necessary. Oil pump failure. Repair or replace. Dirty oil filter element. Service or replace engine oil filter.

Workmaster 75 Transmission Troubleshooting

Excessive transmission noise: Improper backlash or worn gears. Adjust backlash properly or replace the gears. Shift forks are worn or bent. Change defective shift forks. Stuck or worn shaft splines. Shaft need to be changed. Transmission oil insufficient. Fill up the transmission oil. Bearings are cracked or worn. Install new bearings. Transmission fluid is contaminated. Change the fluid.

Hard shifts: Worn or rusty gear shift linkage. Shift linkage need to be replaced. Unadjusted or worn clutch. Clutch needs to be replaced or adjusted. Shift forks are bent or worn out. Install new shift forks. Gearshift mechanism is damaged. Replace or repair the mechanism.

Low transmission fluid pressure: Low oil level. Need to add transmission oil. Dirty transmission fluid filter element (if equipped). Service or change transmission fluid filter. Relief valve malfunction. Install a new valve.

Transmission oil leaks: Worn seals or gaskets. Install new seal or gaskets. Transmission fluid level is exceeded. Excess fluid must be drained.

Workmaster 75 Hydraulic System Troubleshooting

Hydraulic system is overheated: Hydraulic oil type is wrong. Correct type of oil must be used. Hydraulic fluid contamination. Change hydraulic fluid. Air trapped in hydraulic system. Bleed air from system. Main relief valve malfunction. Relief valve replacement required.

Hydraulic oil pressure too low: Hydraulic oil is insufficient. Checking hydraulic oil level and add if necessary. Dirty hydraulic fluid filter. Clean or change hydraulic filter. Hydraulic piping is leaking. Inspect hydraulic system for leaks and repair it. Hydraulic control valve block is not set properly. Use the proper setting. Damaged hydraulic pump. Repair or replace hydraulic oil pump. Broken hydraulic cylinder. Repair or replace hydraulic cylinder.

Hitch can't lift or lifts too slowly: Faulty hydraulic pump. Install a new hydraulic oil pump. Main relief valve is damaged. Relief valve need to be replaced. Faulty hydraulic spool valve. Repair or change hydraulic valve. Hydraulic cylinder is defective. Change or repair hydraulic cylinder. Low hydraulic fluid level. Add fluid as required. Clogged hydraulic fluid filter. Clean or change hydraulic filter. Excessive load on hitch. Reduce the load is required.

3-point hitch can't drop or drops too slowly: Damaged hydraulic cylinder. Repair or change hydraulic cylinder. Not adjusted hydraulic spool valve. Need to adjust spool valve. Lift arm shaft is worn. Replace the shaft. Misadjusted hitch. Adjust three-point hitch as required.

Hitch jerks when drop or lift: Hydraulic fluid contamination. Change hydraulic fluid. Hydraulic pump is defective. Replace or repair hydraulic fluid pump. There is air in the hydraulic system. Bleed hydraulic system. Hydraulic control valve is faulty. Install a new valve or repair it. Faulty hydraulic cylinder. Replace or repair hydraulic cylinder.

Workmaster 75 Steering System Troubleshooting

Steering wheel has too much free-play: Steering column shaft or coupling is worn out. Change faulty part. Faulty steering pump. Install a new steering pump. Steering linkage components are loose or worn. Change or repair steering linkage. Hydrostatic steering unit is defective or worn. Repair or replace the steering unit.

Steering is hard: Air in steering system. Need to bleed air. Steering filter is dirty. Steering filter need to be replaced. Insufficient steering fluid. Fill up the steering fluid. Hydrostatic steering unit has wear or malfunction. Repair or replace the steering unit. Steering pump not working. Replace or repair steering pump. Pump flow control valve is worn or stuck. Clean or install new control valve. Incorrectly mounted or defective steering column. Mount the steering column correctly or replace it. Front tires are worn unevenly. Install new tires. Incorrect toe-in. Adjust toe-in wheels. Steering cylinder is leaking. Replace damaged piston seals or worn piston rod.

Tractor pulls to right or left: Worn or defective hydrostatic steering unit. Replace or repair steering unit as required. Steering cylinder is worn. Replace or repair steering cylinder. Not adjusted toe-in. Check and adjust toe-in. Steering linkage components are loose or worn. Repair or replace steering linkage. Improperly adjusted or defective front wheel bearings. Adjust properly or change bearings. Uneven tire pressure. Inflate the tires properly.

Workmaster 75 Electrical System Troubleshooting

Battery cannot be charged: Loose or corroded electrical wiring connections. Clean or tighten wiring connections. Faulty battery terminal clamps. Replace terminal clamps. Battery dead cell. Battery replacement required. Loose or worn belt. Install a new belt or adjust belt tension.

Starter cranks slowly: Low battery output voltage. Low battery charging, charge as required. Battery does not hold charge. Service battery or replace it. Battery cables are disconnected or terminals are faulty. Check wire connections and change or service terminals.

Starter motor is not working: Battery is low or faulty. Charge or replace the battery. Wiring harness is disconnected or improperly connected. Check wiring harness and connect as required. Low battery capacity. Low battery charging, charge as required. Starter motor failure. Starter should be replaced.