ENGINE MAINTENANCE - Maintenance Procedures 4. Tensioners 5. Engine Dampener 6. A/C Compressor 7. Alternator 2 NOTE 1. Check and correct fan belt tensioner. Your truck may be equipped with an On/Off or Viscous Fan Drive. Follow these guidelines to check your engine fan: Check the fan bearings for fan hub bearing looseness, loss of lubricant and any abnormal conditions. (For example, fan belt misaligned or excessive wear/damage.) Before starting the engine and with the engine off, look and feel for looseness in the fan hub. With the engine idling and the hood open, stand at the front of the vehicle. Listen for any noises coming from the fan hub.
Bearings that have lost lubricant, and are dry, will typically emit a squeal or a growl when the engine is at operating temperature and the fan clutch is engaged. If noise is detected, have the fan bearings inspected by an authorized dealership. Always fit the same type of belts as the ones replaced. Mounting bolt torque. Tensioner maintains proper belt tension. Engine Belt Checks Maintenance check for engine drive belts. Engine Fan General maintenance information and precautions about the engine fan. Perform these maintenance procedures according to the Preventative Maintenance Schedule. 1. Inspect the engine drive belts for the following conditions:
WARNING Do not work on or near the fan with the engine running. Anyone near the en- gine fan when it turns on could be in- jured. If it is set at MANUAL, the fan will turn on any time the ignition key switch is turned to the ON position. In AUTO, it could engage suddenly with- out warning. Before turning on the igni- tion or switching from AUTO to MAN- UAL, be sure no workers are near the fan. Failure to comply may result in death or personal injury. Condition, signs of wear/ deterioration. Alignment. Fan Belt Tensioner Maintenance checks for fan belt tensioner. Perform these maintenance procedures according to the Preventative Maintenance Schedule. Y53-1166-1G1 (08/2018) 69