Group 177 Design and Function Power Take-off Volvo PTO For further information concerning component specifica- tions see service information in Group 1, “Oil and Filter Change Intervals for Volvo Components,” publication number 175–001, and appropriate vendor literature. Volvo PTO’s mount directly to the transmission and do not need separate oil fill and check. Make sure there is extra oil filled in the transmission for the PTO volume. CAUTION Transmission oil heat exchanger should be installed when using PTO continuously over 15 minutes at a time or with a continuous power output over 55 kW (75 hp). Without heat exchanger, the oil can overheat and transmission damage may follow.
If the application has a remotely installed pump or blower with a driveshaft connection, the driveshaft U-joints need to be greased at every maintenance interval or more of- ten, depending on usage. Use a lithium based grease with EP additives and of the consistency of NLGI No. 2. Driveshaft For further information concerning component specifica- tions see service information in Group 1, “Oil and Filter Change Intervals for Volvo Components,” publication number 175–001, and appropriate vendor literature. Use a lithium-based grease with EP additives with a consistency of NLGI No. 2. Do not use conventional chassis grease.
The driveshaft U-joints must be lubricated correctly for the bearings to receive grease. The most common case of U-joint failure is incorrect greasing. Always make sure that grease is coming out of all four seals. If one seal fails to purge old grease, move the driveshaft from side to side while applying gun pressure. This allows for greater clearance on the thrust end of the bearing that is not purging. New grease flushes abrasive contaminants from each bearing and assures that the bearing is filled properly. Failure to correctly grease the driveshaft U-joints or slip-joints can lead to component failure which can re- sult in separation of the driveshaft from the vehicle.
A separated driveshaft can result in major component damage and loss of vehicle control, and can cause serious personal injury or death. 25