2011/09/29 Caterpillar

Industrial Engine:

3056E (S/N: 3561-34,125-126,165-244,246-249,254-327,329-457,459-752,754-815,817-853,855-1041,1044-1124,1127-1686,1688-2237,2239-3090,3092-3158,3160-3467,3469-3685,3687-3719,3721-3756,3758-3998,4001-4056,4059-4059,4061-4065,4067-4088,4090-4160,4162-4621,4623-4625,4627-4656,4658-4672,4675-4728,4730-4779,4781-4798,4800-4841,4843-4863,4865-4923,4925-4927,4929-5038,5040-5118,5120-5241,5243-5243,5245-5366,5372-5419,5421-5467,5469-5471,5473-6233,6235-6329,6331-6345,6347-6369,6371-6396,6398-6429,6434-6480,6487-6567,6569-6636,6639-6736,6738-6738,6740-6751,6755-6766,6772-6784,6789-6805,6808-6808,6811-6811)

There have been a number of isolated instances of issues with the 216-9824 Fuel Injection Pump Gp on certain 3056E engines. The issue is that the nuts that secure the fuel injection pump in position are becoming loose.

If the fuel injection pump becomes loose, follow the procedure below.

1. Remove the fuel injection pump. Refer to Disassembly and Assembly, "Fuel Injection Pump - Remove" for the correct procedure. Remove O-ring seal. Discard O-ring seal.

   Note: Exposed connections on the fuel injection pump should be capped or plugged with suitable caps or plugs to prevent debris from entering the fuel injection pump.

2. Inspect the mounting flange of the fuel injection pump to determine whether the contact surface for the nut is square to the stud or not.

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Illustration 1	g02722094
Typical example

3. If necessary, spot mill the contact surface on all three sides. Ensure that the contact surface is parallel to the front surface of the fuel injection pump and perpendicular to the stud. Refer to illustration 1.

4. Remove the existing studs from the housing (front).

5. Obtain three new 8T-4154 Bolts. Extend the threads of the three bolts down to the head of the bolt with a suitable die.

6. Install the three 8T-4154 Bolts into the housing (front). Tighten the bolts to a torque of 11 N·m (97 lb in).

7. Ensure that the mounting surface of the front housing is flat, clean, and free from damage.

8. Install a new O-ring seal. Install the fuel injection pump to the housing (front). Apply Loctite to the threads of the nuts. Install the nuts to the 8T-4154 Bolts. Tighten the nuts to a torque of 24 N·m (18 lb ft).

9. Ensure that the rear mounting bracket is square and free from damage. Ensure that the bolt holes in the cylinder block are clean, flat, and the threads in the holes are not damaged.

10. Position mounting bracket below the fuel injection pump. Apply Loctite to bolts. Install the bolts to the mounting bracket finger tight. Install the nut to the bolt that secures the fuel injection pump to the mounting bracket finger tight. Tighten the fasteners to a torque of 22 N·m (16 lb ft).