GEAR AS-OIL PUMP 9N4162 - Caterpillar

The engine may be equipped with one of the following types of belts and belt tensioners.Single Belt
The belt on the engine may look like the belt in Illustration 1 or like the belt in Illustration 1.
Illustration 1 g02294633
View of the front of a C15 or a C18 Industrial Engine
(1) Belt
(2) Belt tensioner
(3) Alternator
(4) Idler pulley
(5) Crankshaft pulley
Illustration 2 g02294634
View of the front of a C15 or a C18 Industrial Engine
(1) Belt
(2) Belt tensioner For maximum engine performance and maximum utilization of your engine, inspect the belts for wear and for cracking. Replace the belts, if necessary.To replace the belt, perform the following steps:
Insert a ratchet with a square drive into the square hole that is located in the tensioner for the belt. Rotate the tensioner clockwise in order to relieve tension on the belt. Remove the belt.
Install the new belt correctly, as shown. Be sure that the belt is fully seated on the pulleys. The correct tension will automatically be applied when the ratchet is removed. Two or More Belts
Illustration 3 g02478261
Belt tensioner
(1) Adjustment bolt
(2) 46 mm (1-13/16 inch) jamming locknut (jam nut)
(A) 22 mm (0.87 inch) Inspection of the Belts
Inspect the fan drive belts for wear and for cracking. Replace the belts if the belts are not in good condition.Belt Replacement
For applications that require multiple drive belts, replace the drive belts in matched sets. Replacing one drive belt of a matched set will cause the new drive belt to carry more load because the older drive belts are stretched. The additional load on the new drive belt could cause the new drive belt to fail.Use the following procedure to change the belts.
Using a 46 mm (1-13/16 inch) wrench, loosen the jam nut (2). Note: See figure 3, dimension (A).
Loosen the adjustment bolt (1).
Remove the old belt and replace with a new belt. Contact your Cat dealer for assistance in choosing and ordering new belts.
Tighten the adjustment bolt (1). Use a 144-0235 Belt Tension Gauge to ensure that belt is tensioned according to table 1.
Tighten the jam nut to a torque of 200 25 N m (148 18 lb ft)
Table 1
Fan Drive Belt Adjustment
Belt Tension (Initial) Belt Tension (Used)(1)
801 44 N (180 10 lb) 378 44 N (85 10 lb)
(1) Belt with over 30 minutes of operation at a rated speedBelt Adjustment
Repeat steps 1, 4, and 5 from the belt replacement procedure.