ADAPTER AS 1557321 - Caterpillar

Installation Procedure
Table 1
Required Tools    
Tool    Part Number    Part Description    Qty    
A     1U-7094     Breaker Bar     1    
B     1P-0808     Multipurpose Grease     1    
Illustration 1 g01056037
Apply Tooling (B) onto the shaft and the bore of the belt tightener. Install tightener arm (8) and the idler pulley to the fan drive bracket as a unit with bolt (10) , the washer, and plate (9) .
Illustration 2 g01056036
Personal injury can result from being struck by parts propelled by a released spring force.Make sure to wear all necessary protective equipment.Follow the recommended procedure and use all recommended tooling to release the spring force.
Install springs (4) to the tightener arm with cotter pins, the washers, and pins (6) .Note: Verify that the tightener arm is positioned for the minimum spring tension. Use Tooling (A) to rotate the tightener arm in a clockwise direction.
Position bracket (5) to the fan drive bracket with one bolt (7) and the washer. Connect springs (4) to the bracket. Rotate bracket (5) . Install the remaining bolt (7) and the washer to bracket (5) .
Illustration 3 g00555784
Install bolts (3) and the washers to the bracket.
Illustration 4 g00555777
Connect hose assembly (2) to the elbow on the tightener arm.
Illustration 5 g00555775
The V-belts are under tension from the spring. If the wrench slips while releasing the belt tension, personal injury may result. Be sure the wrench is properly engaged with the belt tightener.
Use Tooling (A) to rotate the tightener arm in a counterclockwise direction. Install V-belts (1) to the fan drive pulley. Rotate the tightener arm in a counterclockwise direction with Tooling (A) in order to tighten the V-belt tension on the belt tightener. Refer to Operation and Maintenance Manual, "Alternator, Air Conditioner, and Fan Belts - Inspect/Adjust/Replace" for the correct tension and the tightening procedure.
Refill the belt tightener with Tooling (B) at the grease fitting on the front housing.