PIN 0993030 - Caterpillar

Personal injury or death can result from sudden machine movement.Sudden movement of the machine can cause injury to persons on or near the machine.To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine.
Personal injury or death can result from escaping fluid under pressure.Escaping fluid under pressure, even a very small pin-hole size leak, can penetrate body tissue and cause serious injury and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury.Always use a board or cardboard when checking for a leak.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Troubleshooting Problem List
Pump noise is not normal.
Lubricant is leaking.
There is constant noise in the winch case.
Low oil pressure to the winch.
The winch drum will not reel in or the winch drum will not reel out.
The winch drum will reel out but the winch drum will not reel in.
The winch drum will reel in but the winch drum will not reel out.
The winch drum will not turn with the winch brake off.Probable Causes of Problems with the winch
ProblemPump noise is not normal.Probable causes
A loud noise at short intervals indicates that foreign material is in the hydraulic system.
A constant loud noise indicates pump failure.
There is air at the inlet side of the pump.ProblemLubricant is leaking.Probable causes
Loss of lubricant through the shafts can be caused by any of the following conditions:
Lubricant is above the proper level.
The wrong type of lubricant is being used.
An oil seal on the shaft is worn or installed incorrectly.
Loss of lubricant at the pinion shaft can be caused by the following conditions:
Lubricant is above the proper level.
The wrong type of lubricant is being used.
An oil seal on the pinion shaft is worn or installed incorrectly.
A universal joint flange is loose on the pinion shaft.ProblemThere is constant noise in the winch case.Probable causes
The level of lubricant is incorrectly high or low.
The wrong type of lubricant is being used.
Bearings are damaged or improperly adjusted.
The ring gear and the pinion do not have correct tooth contact.
The ring gear and the pinion are damaged or worn.
The pinion to gear backlash is excessive or the pinion to gear backlash is insufficient.
Pinion bearings are loose or worn.
Side bearings are loose or worn.ProblemLow oil pressure to the winch.Possible Causes
The control valves are not operating properly.
The oil filter for the winch is plugged.
The setting on the winch relief valve is low.
The cover end is worn on the winch pump.ProblemThe winch drum does not reel in or the winch drum will not reel out.Probable causes
Inspect the control harness