SWITCH GP-MAGNETIC 4L3913 - Caterpillar

Remove Alternator
1. Put identification on the electric wires as to their location on the alternator. Disconnect the wires and ground wire (1) from the alternator.2. Loosen the nuts on adjustment rod (3), to remove the tension on the vee belts.3. Remove guard assembly (2) from the alternator. 4. Remove vee belts (6) from the alternator pulley.5. Remove bolts (5) and (7) to remove alternator (4) from the bracket. The weight of the alternator is 14 kg (30 lb.)Install Alternator
Make sure the nut that holds the alternator pulley in position is tightened to a torque of 100 7 N m (75 5 lb. ft.). 1. Put the alternator in position on bracket (3) and install the bolts and washers that hold it to bracket (3) and adjustment rod (2).2. Install the nuts and washers that hold the guard assembly in position at this time to hold the alternator.3. Put vee belts (1) in position on the drive and alternator pulleys. Make an adjustment of the belt tension with a belt tension gauge such as Borroughs Tool Company Part No. BT-33-95 or an equivalent. Measure the belt farthest from the timing gear cover. Tighten new belts until the gauge indication is 120 5. Operate the engine at high idle for a minimum of 30 minutes after Step 4. Make another adjustment of the belt tension. The correct gauge indication for used belts is 90 10. 4. Connect the electric wires and ground wire (4) to their correct locations on the alternator.5. Remove the two nuts and washers that hold the alternator in position and install guard assembly (5). Install the two nuts and washers.