TOOL AS-INSTL 4227508 - Caterpillar

Removal Procedure
If the engine has guards, remove the guards. Refer to the Original Equipment Manufacturer (OEM) for the correct procedure.
Remove the alternator belt. Refer to Disassembly and Assembly, "Alternator Belt - Remove and Install." for the correct procedure.
Illustration 1 g02019713
Make a temporary mark on belt tensioner (3) in order to identify the correct orientation and the position.
Loosen bolt (2) sufficiently in order to remove belt tensioner (3) from mounting bracket (1).
Remove belt tensioner (3) from mounting bracket (1). Installation Procedure
Ensure that all components of the belt tensioner are clean and free from wear and damage. If necessary, replace any components that are worn or damaged.
Illustration 2 g02093515
Illustration 3 g02092593
Position belt tensioner (3) with locating pin (5) in locating hole (4) on mounting bracket (1). Tighten bolt (2) finger tight.
Tighten bolt (2) to a torque of 45 N m (33 lb ft).
Install the alternator belt. Refer to Disassembly and Assembly, "Alternator Belt - Remove and Install." for the correct procedure.
If the engine has guards, install the guards. Refer to the OEM for the correct procedure.