ENGINE MAINTENANCE - Maintenance Procedures Engine Fan Blade 3. Place a flex-bar with a 15 mm socket on the fastener securing the automatic belt tensioner's roller, as shown in the image. (bore). This facilitates removal and installation of the poly V- belt. 6. After removing the belt, carefully allow the belt tensioner to spring back to the stop (if it had not been temporarily blocked). 7. Inspect the pulleys for damage, rust, and grease deposits. Clean or replace as necessary. Verify that there is enough fan blade clearance with the fan shroud. Around the fan shroud, the recommended distance is 1 in. (25 mm) from front edge of any fan blade-to-radiator side member.
Minimum clearance is 3/4 in. (19 mm). Rear edge of any blade must be no closer than 3/8 in. (9 mm) to the nearest engine component. If this cannot be obtained, the fan spacer or fan is not correct. The leading edge of any fan blade must be 1 in. (25 mm) from the inside edge of the shroud. 2 Flex Bar on Tensioner - V-belt and Fan Drive Belt Poly V-belt and Fan Drive Belt Installation Procedure to install poly v-belt and fan drive engine belts. Poly V-belt and Fan Drive Belt Removal Engine belt replacement procedures for poly v-belt and fan drive belts. Follow the steps below to install the poly v- belt and fan drive belts: 1.
Place the new poly V-belt over the pulleys, making certain the belt falls into all the belt pulley grooves. Perform these maintenance procedures according to the Preventative Maintenance Schedule. 1. Disconnect the electrical ground wire from the battery. 2. Reach between the fan blades and remove the fan blade mounting bolts using a 9/16” socket to remove the mounting nuts. 4. Rotate the flex-bar as shown in the diagram to relieve belt tension. 5. With the belt tensioner pressure relieved, remove the poly V-belt from the pulleys. NOTE When installing the belts do not wrap belt around the tensioner until after the belt has been wrapped around all oth- er pulleys and idlers.
The tensioner can be temporarily blocked with a 0.16-0.2 inch (4-5 mm) thick pin 2. After installing the belt, carefully allow the belt tensioner to spring 70 Y53-1166-1G1 (08/2018)