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| Home / Skid Steer Loaders / Bobcat Skid Steer Loaders / Bobcat 632 |
Bobcat 632 Troubleshooting
The
Clark Bobcat 632 skid steer loader driveline system components: 98 cu.in (1.6L)
Ford 1498 4-cycle 4-cylinder liquid-cooled gasoline engine with a rated power of
30 hp (22 kW), and single-speed hydrostatic transmission. The hydraulic system
has a pump with a rated capacity of 9.5 gal/min (36 l/min). The system relief
pressure is 2500 psi (172 bar). The Clark Bobcat 632 is equipped with
radial-lift loader boom, 80H drive chains, and 7.00x15 tires. The loader has a
maximum lift height is 108.7 inches (2760 mm) to hinge pin, and dump height is
86.3 inches (2190 mm). The rated operating capacity is 1000 lbs (450 kg), and
tipping load is 2100 lbs (950 kg).
| Engine Troubleshooting |
Engine difficult to start or doesn't start
No fuel in fuel tank - Fill gasoline up.
Wrong grade of gasoline - Use correct gasoline grade.
Air or water in fuel system - Remove water or air from fuel system.
Spark plug wire is loose or disconnected - Check spark plug wiring connection, repair or change.
Damaged spark plug - Spark plug need to be replaced.
Ignition failure - Inspect ignition system and change failed components.
Clogged fuel filter - Replace fuel filter.
Fuel lines are dirty - Clean fuel system lines.
Fuel pump is dirty or defective - Test fuel pump and change if necessary.
Carburetor settings incorrect - Adjusting as required.
Poor compression - Inspect and replace wear parts.
Engine runs unevenly
Ignition failure - Test ignition and replace failed parts.
Air filter element is plugged - Clean or change.
Spark plug is defective - Replace spark plug.
Fuel pump is defective or dirty - Test fuel pump and change if necessary.
Valve clearance is wrong - Adjustment procedure required.
Wrong ignition timing - Set the ignition timing correctly.
Improperly adjusted low idle speed - Adjust idle speed.
Engine starts and immediately shuts off
Defective spark plug - Change spark plug.
Carburetor is clogged or faulty - Repair or clean carburetor.
Ignition coil is not working - Install a new ignition coil.
Valve springs are bad or broken - New valve springs need to be installed.
Stuck valves - Clean the valves.
Engine is overheated
Engine oil level low - Checking oil level and add if necessary.
Engine is running overloaded - Load reducing required.
Carburetor fuel mixture is too lean - Use proper settings.
Ignition timing is improper - Ignition timing needs to be set properly.
Improper valve setting - Set the valves correctly.
Defective radiator cap or clogged radiator core - Replace cap or clean radiator.
Lack of coolant in cooling system - Refill to the correct level and inspect system for leaks.
Thermostat is faulty - Install new thermostat.
Defective water pump - Water pump need to be replaced.
Engine noises or knocks
Stale or low octane fuel - Use correct gasoline.
Engine is under excessive load - Reduce load.
Low engine oil level - Check and refill engine oil.
Too low idle RPM - Adjustment required.
Fuel pump is clogged or faulty - Check fuel pump and replace if necessary.
Crankshaft or main bearings wear - Crankshaft or bearings need to be replaced.
Valve clearance is not correct - Adjustment procedure required.
Worn cylinder bore or piston rings - Replace defective parts.
Engine power is insufficient
Carburetor is improperly adjusted or clogged - Adjust the carburetor properly or clean it.
Dirty air filter element - Clean or replace air filter.
Fuel pump is dirty or defective - Clean or change fuel pump.
Ignition system problems - Inspect ignition system and change failed components.
Blown cylinder head gasket - Install new cylinder head gasket.
Stuck or burned valves - Service or change valves.
Cylinder block components are damaged - Change defective parts.
Clogged oil filter - Service or change oil filter.
Engine uses too much fuel
Air filter is dirty - Service or change air filter.
Improper carburetor main jet adjustment - Adjust it correctly.
Spark plug is faulty or loose - Spark plug need to be replaced or tightened.
Incorrect ignition timing - Adjust ignition timing correctly.
Valves are stuck, burned, or worn - Replace or service valves.
Worn piston, rings, or sleeve - Replace defective components.
Valve clearance is not correct - Need to adjust valve clearance.
Bad engine compression - Inspect cylinder block and replace worn components.
Engine oil consumption is too high
Worn gaskets or seals - Defective components must be replaced.
Valve stems and guides are worn - Install new valves.
Piston rings are stuck or broken - Replace piston rings.
Damaged cylinder liner or piston - Check piston and liner, change as required.
Engine backfires
Carburetor fuel mixture is too lean - Make the correct settings.
Dirty fuel lines - Fuel lines need to be cleaned.
Bad ignition timing - Set the ignition timing properly.
Valve setting is wrong - Valves needs to be set correctly.
Air filter element is clogged - Replace or clean air filter.
| Drive System Troubleshooting |
Machine will not move in either direction or one direction
Hydraulic oil is insufficient - Check and refill the hydraulic oil.
Drive chain failure - Check drive chain and change faulty parts.
Relief valve failure - Rebuild or install a new relief valve.
Clogged suction line or hydraulic filter - Check, clean, or replace if required.
Foot or hand controls are faulty - Check and repair as required.
Worn drive motor or pump - Change or repair faulty component.
Loss of power
Dirty hydraulic oil filter - Check, clean, or replace as required.
Relief valve is defective or open - Change or close relief valve.
Transmission parts are damaged or faulty - Check and change defective components.
Input drive shaft is defective - Repair or replace faulty drive shaft.
Hydraulic system is leaking air - Bleed hydraulic system.
Drive system overheating
Insufficient hydraulic fluid - Check and refill the hydraulic fluid.
Dirty hydraulic fluid filter - Change or clean hydraulic filter.
Defective or worn relief valve - Repair or change.
Hydraulic motor or drive pump is worn - Change or repair faulty component.
Dirty oil cooler - Clean cooling fins as required.
Drive system overload - Load needs to be reduced.
Excessive noise
Wrong oil viscosity - Use proper oil viscosity.
Air leaks in hydraulic system - Bleed air from system.
Hydraulic motor or drive pump is worn - Replace or repair faulty component.
Mechanical parts of drive system are worn or damaged - Inspect the components for worn or defect and repair as required.
| Hydraulics Troubleshooting |
Hydraulic system is overheated
Hydraulic pressure incorrectly adjusted - Correct adjustment is required.
Main relief valve improper adjustment or failure - Adjust or replace the relief valve.
Dirty hydraulic fluid - Change hydraulic fluid.
Lack of hydraulic fluid - Need to add fluid.
Hydraulic pump is worn - Repair or replace pump if necessary.
Boom cannot be lowered or raised
Lift controls are faulty - Check and repair as required.
Hydraulic pump is broken - Replace or repair pump if necessary.
Hydraulic control valve is faulty - Repair or replace hydraulic valve.
Hydraulic cylinder is broken - Replace or repair boom cylinder.
Insufficient hydraulic fluid - Fill up the hydraulic fluid.
Bucket fails to tilt
Damaged bucket controls - Repair or replace.
Hydraulic pump is broken - Repair or change pump if required.
Hydraulic control valve is defective - Install a new hydraulic valve or repair it.
Bucket cylinder failure - Install a new cylinder or repair it.
Insufficient hydraulic oil - Checking hydraulic oil level and add if necessary.
Slow boom or bucket action
Hydraulic pump is worn - Check pump performance and change it if necessary.
Oil leaks from hydraulic cylinder - Repair leak by replacing the seals.
Insufficient hydraulic fluid - Fill up the hydraulic fluid.
Hydraulic control valve is unadjusted or worn - Set correctly or repair.
Hydraulic pressure has dropped - Adjust it correctly.
Lift arm or bucket is jerky
Air trapped in hydraulic system - Bleed air from system.
Hydraulic oil filter is dirty - Service or replace the hydraulic filter.
Dirty hydraulic oil - Change hydraulic oil.
Cylinder tube or rod is scored - Change failed component.
Hydraulic pump makes excessive noise
Lack of oil or hydraulic leakage - Refill hydraulic oil or repair leaks in system.
Dirty hydraulic filter - Change or clean oil filter.
Suction line is clogged - Suction line must be serviced.
Air in hydraulic pump - Remove air from hydraulics.
Pump parts are faulty - Rebuild or change hydraulic pump.
| Electrical Troubleshooting |
Battery will not charge
Corroded or loose cable connections - Tighten or clean connections.
Electrical terminal connectors are faulty - Terminal connectors need to be changed.
Battery bad cell - Battery replacement required.
Belt is defective or loose - Change belt or adjust belt tension.
Starter motor turns slow
Battery voltage is low - Battery needs to be recharged.
Battery runs out quickly - Service charging system or install new battery.
Bad terminals or disconnected battery cables - Connect wires properly or change terminals.
Starter will not work
Battery is discharged or defective - Recharge or replace battery.
Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly.
Low battery capacity - Battery is drained, charge it.
Starter motor is defective - Starter should be changed.
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| SKID STEER LOADERS SPECIFICATIONS |