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| Home / Skid Steer Loaders / Bobcat Skid Steer Loaders / Bobcat 733 |
Bobcat 733 Troubleshooting
The
Clark Bobcat 733 skid steer loader is powered by 105.7 cu.in (1.7L) Kubota V1702
4-cylinder naturally aspirated liquid-cooled diesel engine with a rated power of
36 hp (26.8 kW) at 2800 rpm. The Clark Bobcat 733 is equipped with a
single-speed hydro transmission, radial-lift loader boom, 80H drive chains, and
10.00x16.5 tires. The hydraulic system has a pump with fluid flow rate of 11 gpm
(42 lpm). The hydraulic pressure is 2500 psi (172 bar). The skid steer has a
rated operating capacity of 1300 lbs (590 kg) and tipping load of 2600 lbs (1180
kg). The max lift height is 109 inches (2770 mm) to hinge pin, and dump height
is 88.4 inches (2245 mm).
| Engine Troubleshooting |
Engine starts hard or doesn't start
Air in the fuel lines - Bleed the fuel lines.
Fuel filter plugged - Clean or change the filter.
Clogged or defective injection nozzles - Replace injection nozzles.
Water in the fuel system - Change fuel and repair fuel system.
Valve out of adjustment - Adjust valve clearance.
Fuel injection pump malfunction - Repair or install a new fuel pump.
Engine stalls after starting
Air filter is dirty - Clean or change.
Fuel filter element clogging - Clean or change the filter.
Fuel injection pump is leaking - Repair any leaks.
Fuel injectors are dirty or defective - Inspect fuel injectors and change as required.
Fuel injection pump is defective - Repair or install new pump.
Engine stops suddenly during operation
Coolant temperature is low - Warm up the engine.
Clogged fuel filter - Install new filter element.
Air in fuel tank - Bleed fuel tank.
Dirty or faulty injection nozzles - Clean or change injection nozzles.
Fuel injection pump timing is wrong - Adjust the pump as required.
Engine stalls when idling
Incorrect low idle setting - Test and adjust.
Fuel injection pump damage - Change pump or rebuild it.
Dirty or defective injectors - Replace fuel injectors.
Valve out of adjustment - Adjust valve clearance.
Diesel engine is losing power
Air cleaner is clogged - Clean or replace air cleaner element.
Damaged or dirty injection nozzles - Clean or change injection nozzles.
Fuel injection pressure is wrong - Correct the pressure settings.
Excessive valve clearance - Have it adjusted.
Low idle speed setting is incorrect - Adjust as required.
Fuel hoses or lines are clogged - Clean fuel system lines and hoses.
Cylinder head gasket is damaged - Install new cylinder head gasket.
Piston rings are defective or leaking - Change piston rings.
Engine overheats
Low engine coolant - Add coolant and check the components of cooling system.
Low engine oil level - Need to add engine oil.
Dirty radiator core or defective radiator cap - Install new cap or clean radiator.
Broken or loose fan belt - The fan belt needs to be replaced.
Diesel engine overloaded - Load reducing is recommended.
Oil pressure is low
Engine oil insufficient - Add oil to the engine crankcase.
Oil filter element clogged - Clean or change engine oil filter.
Different type of engine oil - Use correct viscosity oil.
Incorrect crankshaft bearing oil clearance - Install new bearings.
Worn oil pump - Repair or change.
Engine knocks or noises
Engine oil level is low - Check oil level and add oil as required.
Coolant temperature is low - Warm up engine as required.
Fuel injection pump timing is not adjusted - Adjust according to specifications.
Low idle speed setting is not correct - Adjust low idle speed.
Defective fuel injectors - Replace fuel injectors.
Misaligned or faulty connecting rod - Align or change connecting rod.
Worn or scored pistons - Have pistons replaced.
| Drive System Troubleshooting |
Drive system does not work in either direction
Hydraulic fluid is insufficient - Fill up the hydraulic fluid.
Drive chain is damaged - Check drive chain and change defective components.
Relief valve failure - Repair or install a new relief valve.
Plugged suction line or hydraulic filter - Service suction line or change hydraulic filter.
Foot or hand controls are faulty - Replace or repair.
Worn drive motor or pump - Replace or repair faulty component.
Loss of power
Hydraulic oil filter is clogged - Replace hydraulic filter.
Relief valve is defective or open - Replace or close relief valve.
Faulty or worn transmission components - Inspect and change faulty parts.
Defective input drive shaft - Repair or replace drive shaft.
Air leaks in hydraulic system - Bleed air from hydraulic system.
Drive system overheats
Low hydraulic oil level - Fill the system to proper hydraulic oil level.
Hydraulic fluid filter is dirty - Change hydraulic filter.
Relief valve is worn or damaged - Service or change relief valve.
Damaged drive pump or hydraulic motor - Repair or change faulty component.
Dirty oil cooler - Cooling fins should be cleaned.
Drive system overload - Reduce the load.
Excessive noise
Incorrect oil viscosity - Use oil of correct viscosity.
Hydraulic system is leaking air - Bleed air from hydraulic system.
Drive pump or hydraulic motor is damaged - Repair or replace faulty component.
Mechanical components of drive system are defective or worn - Inspect drive system and replace faulty parts.
| Hydraulics Troubleshooting |
Hydraulic system overheats
Hydraulic pressure is not adjusted correctly - Correct setting is required.
Defective or misadjusted main relief valve - Adjust the valve or replace if necessary.
Dirty hydraulic fluid - Fill up with fresh hydraulic fluid.
Lack of hydraulic oil - Check oil level and add hydraulic oil as required.
Defective hydraulic pump - Replace or repair pump if necessary.
Lift arm can't drop or lift
Lift controls failure - Repair or change.
Hydraulic pump failure - Change or repair hydraulic pump if required.
Defective hydraulic control valve - Change or repair hydraulic valve.
Hydraulic cylinder malfunction - Repair or install a new lift cylinder.
Insufficient hydraulic fluid - Checking hydraulic fluid level and add if necessary.
Bucket tilt does not work
Defective bucket controls - Inspect and repair if necessary.
Damaged hydraulic oil pump - Repair or replace pump if necessary.
Hydraulic control valve is faulty - Repair or change hydraulic valve.
Bucket cylinder is faulty - Change or repair cylinder.
Hydraulic oil level low - Checking hydraulic oil level and add if necessary.
Bucket or lift arm runs slowly
Hydraulic pump is defective - Test the pump flow rate and install new pump if required.
Leaking hydraulic cylinder - Cylinder seals need to be replaced.
Low hydraulic fluid level - Add fluid as required.
Hydraulic control valve is faulty or out of adjustment - Adjust correctly or repair.
Hydraulic pressure has dropped - Set pressure correctly.
Bucket or boom is working jerkily
Air leaks in hydraulic system - Bleed hydraulic system.
Clogged hydraulic oil filter element - Change or clean oil filter.
Hydraulic oil is contaminated - Hydraulic oil change required.
Scored cylinder tube or rod - Replace defective component.
Hydraulic pump makes excessive noise
Hydraulic system leaking or not enough oil - Add hydraulic oil or correct system leaks.
Hydraulic filter is dirty - Clean or install new filter.
Clogged suction line - Suction line needs to be cleaned.
Air enters the pump - Remove air from hydraulics.
Pump parts are faulty - Rebuild or change hydraulic pump.
| Electrical Troubleshooting |
Battery cannot be charged
Electrical cable connections are corroded or loose - Clean or tighten wiring connections.
Electrical terminal connectors are faulty - Terminal connectors should be replaced.
Worn-out battery - Change the battery.
Loose or damaged belt - Install a new belt or adjust belt tension.
Starter cranks slow
Low battery voltage - Charge the battery.
Battery will not hold charge - Service charging system or change battery.
Faulty battery terminals or disconnected cables - Check battery wires and service or replace terminals.
Starter is not cranking
Battery is discharged or defective - Charge or replace the battery.
Wire harness is disconnected or incorrectly connected - Check wire harness and connect as required.
Battery power is low - Battery is drained, recharge it.
Starter motor is damaged - Replace or repair starter.
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| SKID STEER LOADERS SPECIFICATIONS |