OIL PUMP GROUP 4S9003 - Caterpillar

Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A(1) - 1/2 Inch Drive T50 Torx Bit 1
- 1/2 Inch Drive x 8 mm Hex Drive 1
(1) Either tool may be necessary in order to remove the alternator pulley.Start By:
Remove the alternator belt. Refer to Disassembly and Assembly, "Alternator Belt - Remove and Install" for the correct procedure.
Turn the battery disconnect switch to the OFF position.
Illustration 1 g02020053
Place identification marks on all wiring harness connections (3). Remove nuts (4) and nut (5).
Remove harness assembly (3) from alternator (2).
Remove bolt (7) from alternator (2). Disconnect grounding strap (6) from alternator (2).
Support the weight of the alternator and remove bolts (1). Remove alternator (2) from the alternator bracket.
Illustration 2 g02022400
If necessary, follow Step 6.a through Step 6.d in order to remove pulley (8) from alternator (2). Note: Either of Tooling (A) may be required in order to carry out the removal of the alternator pulley.
Place alternator (2) in a suitable support.
Hold shaft (10) of alternator (2) with Tooling (A). Use a cranked ring spanner to loosen nut (9).
Make a temporary mark on pulley (8) in order to show the correct orientation.
Remove nut (9) and pulley (8) from shaft (10).
Illustration 3 g02022403
Illustration 4 g02022404
If necessary, follow Step 7.a through Step 7.d in order to remove alternator bracket (11) from the cylinder block.
If necessary, remove bolt (14) and remove flat idler pulley (13) from alternator bracket (11).
If necessary, remove belt tensioner (15) from alternator bracket (11). Refer to Disassembly and Assembly, "Belt Tensioner - Remove and Install" for the correct procedure.
Remove bolts (12) from alternator bracket (11). Remove the alternator bracket from the cylinder block. Note: Support the weight of the alternator bracket as the bolts are removed.
Note the position of dowels (16) in alternator bracket (11). Alternator Bracket for Hydraulic Excavator
If necessary, follow Step 1.a through Step 1.d in order to remove the alternator bracket for the hydraulic excavator from the cylinder block.
Remove the refrigerant compressor. Refer to Disassembly and Assembly, "Refrigerant Compressor - Remove and Install" for the correct procedures.
Illustration 5 g02320154
Remove bolts (19). Note the position of spacers (20) in bracket (17).
Remove bolts (18) from bracket (17). Note: Support the weight of the bracket as the bolts are removed. The bracket can weight 19 kg (42 lb).
Illustration 6 g02320156
Remove bolts (22) and remove bracket (21) from the cylinder block.