Home / Skid Steer Loaders / Bobcat Skid Steer Loaders / Bobcat S185

Bobcat S185 Troubleshooting

The Bobcat S185 skid steer loader driveline system components: Kubota V2003 diesel engine with a rated power of 56 hp (41.7 kW) or Kubota V2607 diesel engine with a rated power of 61 hp (45.2 kW), and 1-speed or 2-speed transmission. The hydraulic system has a pump with a rated capacity of 16.9 gal/min (65 l/min). The system relief pressure is 3350 psi (231 bar). The Bobcat S185 is equipped with vertical-lift loader boom, 80 HSOC roller chains, and 10x16.5 tires. The skid steer has a boom lifting force of 3495 lbs (1588 kg) and bucket breakout force of 3420 lbs (1554 kg). The rated operating capacity is 1850 lbs (840 kg), and tipping load is 3900 lbs (1770 kg).

Engine Troubleshooting

Diesel hard to start or doesn't start
Air trapped in fuel system - Bleed air.
Clogged fuel filter - Clean the filter element.
Dirty or faulty injection nozzles - Check and replace nozzles if required.
Water in the fuel system - Change fuel and repair fuel system.
Improper valve clearance - Adjust valve clearance.
Fuel injection pump malfunctioning - Rebuild or install a new injection pump.

Diesel starts but immediately shuts off
Plugged air filter - Service or replace the air filter.
Fuel filter element is clogged - Change filter element.
Fuel injection pump leakage - Check the fuel injection pump for leaks and fix it.
Clogged or defective injectors - Test and replace fuel injectors if necessary.
Fuel injection pump is faulty - Replacement or repair required.

Engine stalls while running
Engine is not preheated - Engine is not warmed up to required temperature.
Dirty fuel filter - Clean the filter or install new filter element.
Air trapped in fuel system - Bleed air.
Clogged or defective injection nozzles - Clean or replace injection nozzles.
Fuel injection pump timing is wrong - Set the fuel pump timing correctly.

Engine stalls when idle
Incorrect low idle speed adjustment - Adjust low idling as recommended.
Defective fuel injection pump - Rebuild or change fuel pump.
Defective fuel injectors - Inspect fuel injectors and change as required.
The valve clearance is incorrect - Correct valve clearance needs to be set.

Engine power is too low
Plugged air filter - Clean or replace element.
Clogged or burnt injection nozzle - Install a new kit of correctly balanced nozzles.
Fuel injection pressure is incorrect - Check the fuel injection pressure and adjust if necessary.
The valve clearance is not adjusted - Adjustment procedure required.
Low idle speed set incorrectly - Adjust low idling as recommended.
Fuel lines or hoses are dirty - Service fuel lines and hoses.
Worn cylinder head gasket - Replace cylinder head gasket.
Piston rings are defective or leaking - Replace piston rings.

Engine overheats
Low engine coolant - Add coolant and check the components of cooling system.
Engine oil level is low - Fill the crankcase with engine oil.
Clogged radiator fins or leaking radiator cap - Install new cap or clean radiator.
Fan belt is loose or defective - Change the fan belt.
Engine overload - Load reducing required.

Oil pressure too low
Engine oil insufficient - Fill crankcase to proper oil level.
Engine oil filter is plugged - Service or replace engine oil filter.
Incorrect engine oil Fill up with the proper oil viscosity.
Main bearing oil clearance is excessive - Replace bearings.
Oil pump is damaged - Repair or replace.

Engine noises or knocks
Engine oil level is low - Fill up the engine oil.
Low coolant temperature - Warm up the engine.
Fuel injection pump timing is not adjusted - Set up as recommended.
Incorrect low idle speed adjustment - Correct the settings.
Defective fuel injectors - Change or clean fuel injectors.
Connecting rod misalignment or failure - Connecting rod needs to be aligned or changed.
Pistons are worn or broken - Have pistons replaced.

Drive System Troubleshooting

Machine will not move forward or backward
Hydraulic oil is insufficient - Need to add oil.
Drive chain fault - Check drive chain and change faulty parts.
Defective input drive shaft - Replace or service the drive shaft.
Relief valve is not working correctly - Rebuild or install a new relief valve.
Dirty suction line or hydraulic filter - Check, clean, or change if necessary.
Worn or defective hand or foot controls - Repair or change.
Damaged drive pump or motor - Change or repair faulty component.

Lack of power
Clogged hydraulic oil filter - Replace or clean hydraulic filter.
Opened or worn relief valve - Change or close relief valve.
Defective or worn transmission parts - Check and change defective components.
Input drive shaft is damaged - Rebuild or change the shaft.
Air trapped in hydraulic system - Bleed air from hydraulic system.

Drive system keeps overheating
Insufficient hydraulic fluid - Fill up the hydraulic fluid.
Dirty hydraulic fluid filter - Change hydraulic filter.
Faulty relief valve - Change or repair relief valve.
Damaged drive pump or hydraulic motor - Inspect and replace as necessary.
Dirty oil cooler - Cooling fins need to be cleaned.
Overloaded drive system - Reduce loading.

Drive system is noisy
Improper oil viscosity - Use proper oil viscosity.
Air trapped in hydraulic system - Bleed air from system.
Hydraulic motor or drive pump is worn - Repair or replace faulty component.
Mechanical parts of drive system are defective or worn - Check drive system and change faulty components.

Hydraulics Troubleshooting

Hydraulic system has overheating
Hydraulic pressure is not adjusted correctly - Correct adjustment is required.
Misadjusted or defective main relief valve - Set up or change the relief valve.
Hydraulic oil is contaminated - Fill up with fresh hydraulic oil.
Hydraulic fluid level is low - Add fluid to the hydraulic system.
Faulty hydraulic oil pump - Repair or change pump if required.

Lift arm won't raise or lower
Damaged lift controls - Replace or repair.
Hydraulic pump failure - Install new pump or repair it.
Hydraulic control valve malfunction - Install a new valve or repair it.
Defective hydraulic cylinder - Replace or repair boom cylinder.
Low hydraulic oil level - Need to add oil.

Bucket can't tilt
Bucket tilt controls are damaged - Inspect and repair if necessary.
Hydraulic pump failure - Repair or change pump if required.
Damaged hydraulic control valve - Install a new valve or repair it.
Bucket cylinder failure - Repair or change cylinder.
Low hydraulic oil level - Need to add oil.

Slow boom or bucket operation
Defective hydraulic pump - Flow-rate pump and change pump if necessary.
Hydraulic cylinder leaking - Replace cylinder piston seals.
Hydraulic fluid level low - Add fluid as required.
Damaged or incorrect adjusted hydraulic control valve - Repair or adjust correctly.
Low hydraulic pressure - Adjust pressure as required.

Jerky operation of the bucket or boom
Air in hydraulic system - Bleed air from system.
Hydraulic oil filter clogging - Service or replace the hydraulic filter.
Contaminated hydraulic fluid - Hydraulic fluid change required.
Cylinder rod or tube is scratched - Change failed component.

Hydraulic pump is excessively noisy
Not enough oil or hydraulic system leaking - Refill hydraulic oil or repair leaks in system.
Clogged hydraulic filter - Replace or clean the filter.
Plugged suction line - Need to clean the suction line.
Air trapped in hydraulic pump - Remove air from hydraulics.
Pump components are damaged - Replace or rebuild the pump.

Electrical Troubleshooting

Battery is not charging
Loose or corroded electrical wiring connections - Clean or tighten connections.
Defective battery terminal clamps - Terminal clamps need to be replaced.
Battery faulty cell - Replace the battery.
Belt is loose or defective - Need to adjust belt tension or replace belt.

Starter motor turns slow
Battery capacity is low - Battery needs to be recharged.
Battery does not hold charge - Service or replace the battery.
Wires are disconnected or battery terminals are corroded - Check battery wires and service or replace terminals.

Starter motor is not working
Battery is discharged or defective - Charge or change the battery.
Wiring harness is disconnected or improperly connected - Check wiring harness and connect as required.
Battery voltage is low - Charge the battery.
Starter motor failure - Starter needs to be changed.