RAM 3500 Van V8-5.9L VIN Z LDC (1998)
Fan Blade And Viscous Fan Drive-Typical
6. The thermal viscous fan drive is attached (threaded) to the water pump hub shaft. Remove the fan/fan drive assembly from water pump by turning
the mounting nut counterclockwise (as viewed from front). Threads on the fan drive are RIGHT HAND. A Snap-On 36 MM Fan Wrench (number
SP346 from Snap-On Cummins Diesel Tool Set number 2017DSP) can be used. Place a bar or screwdriver between the water pump pulley bolts to
prevent the pulley from rotating.
7. If water pump is being replaced, do not unbolt fan blade assembly from the thermal viscous fan drive.
8. Remove fan blade/fan drive assembly from vehicle.
9. After removing fan blade/fan drive assembly, do not place the thermal viscous fan drive in the horizontal position. If stored horizontally, the
silicone fluid in the viscous drive could drain into its bearing assembly and contaminate the bearing lubricant.
10. Do not remove the water pump pulley bolts at this time.
Automatic Belt Tensioner-Typical
11. Remove accessory drive belt as follows: The drive belt is equipped with a spring loaded automatic belt tensioner. Relax the tension from the belt
by rotating the tensioner clockwise (as viewed from front). When all belt tension has been relaxed, remove accessory drive belt.
12. Remove the four water pump pulley-to-water pump hub bolts and remove pulley from engine.
13. Remove the lower radiator hose at water pump.
