DIAPHRAGM 1233970 - Caterpillar

Illustration 6 g06136427
Inspect the bore in front housing (29) for damage. If the bore is damaged, replace the front housing. Refer to Disassembly and Assembly, "Housing (Front) - Remove" and Disassembly and Assembly, "Housing (Front) - Install" for the correct procedure
Carefully install fuel injection pump (19) to front housing (29). Ensure that the bore in the front housing is not damaged as the fuel injection pump is installed.Note: The fuel injection pump should be supported by hand as the bolts are installed.
Ensure that key (35) aligns correctly with fuel injection pump gear (3). Ensure that the fuel injection pump gear is correctly seated onto fuel injection pump shaft (4). Ensure that the key is not dislodged from fuel injection pump shaft (4) as fuel injection pump (19) is installed into the front housing (29).
Install bolts (30) to fuel injection pump (19) hand tight.
Install a new spring washer (6) (not shown) and install nut (5) hand tight.
Illustration 7 g06136426
Tightening sequence for fuel injection pump bolts (30)
Illustration 8 g03675419
Tighten bolts (30) in the sequence shown in Illustration 7 to a torque of 44 N m (32 lb ft).
Use a suitable tool to hold crankshaft and tighten nut (5) to a torque of 160 N m (118 lb ft).
To ensure that the timing between the crankshaft, idler gear, fuel injection pump, and camshaft is correct. Use Tooling (A) to rotate the crankshaft in a clockwise direction to align the timing marks as shown in Illustration 8. If necessary, install Tooling (B) to the lock the crankshaft in the correct position.
Remove Tooling (B) and Tooling (A).
Illustration 9 g06136430
Position bracket (33) onto the cylinder block and fuel injection pump (19). Install bolts (34) to the bracket finger tight.
Install the nut and bolt (32) to bracket (31) and bracket (33) finger tight.
Tighten the nut and bolt (32) to a torque of 44 N m (32 lb ft).Note: Ensure that the fuel injection pump is not stressed as the nut and bolt for the bracket are tightened.
Tighten bolts (34) to a torque of 22 N m (195 lb in).Note: Ensure that the fuel injection pump is not stressed as the bolts for the bracket are tightened.
Illustration 10 g03388236
Install a new O-ring seal (1) to plug (2). Install the plug into Position (W) of the cylinder block. Tighten the plug to a torque of 21 N m (186 lb in).
Illustration 11 g06132014
Remove plug from fuel injection pump (19). Remove cap from tube assembly (20).
Install a new sealing washer (22)