2014/05/20 Caterpillar

Engine:

C9 (S/N: F9D1-UP; C9F1-UP; CKP1-UP; X3R1-UP; C9Y1-UP; P7Z1-UP)

Generator Set:

C9 (S/N: C9E1-UP; NBP1-UP; NB31-UP; SJB1-UP; C9A1-UP)

Industrial Engine:

C9 (S/N: JSC1-UP; MBD1-UP; REH1-UP; JLW1-UP)

C9.3 (S/N: C9N1-UP; D9N1-UP; CA91-UP; CP91-UP; CS91-UP)

Marine Engine:

C9 (S/N: C9B1-UP; CSN1-UP; X9X1-UP; X9Y1-UP)

Petroleum Engine:

C9 (S/N: P9L1-UP; KLW1-UP; P9W1-UP; KLX1-UP)

Petroleum Power Train Package:

CX31-P600-C9I (S/N: PDZ1-UP)

TH31-C9I (S/N: PAZ1-UP)

TH31-C9P (S/N: PFZ1-UP)

TH31-C9T (S/N: PAY1-UP)

Petroleum Transmission:

TH31-E61 (S/N: SKY1-UP)

Engine News SEBD9927, 07 February 2014, "Low Engine Oil Pressure Issues, Oil Pump Failures for C9 and C9.3 Commercial Engines". Disregard the article. Refer to the following information.

Description of Change: The plug that holds the oil bypass valve spring backs out on certain machines

Adaptable To: Vibration causes loss of torque, low torque, and lack of thread locker.

Rework Procedure

Illustration 1	g03420477

1. Insert the plunger as shown Illustration 1 (where spring sits on the nose of the plunger).

2. Apply Loctite 271 on the middle section of the plug.

3. Torque the plug to 110 N·m (81 lb ft).

This change is effective with the engines built on or after 1May 2013.

The new joint is part of the following units:

• 293-9797 Engine Oil Pump As

• 293-9798 Engine Oil Pump Gp

• 331-8905 Engine Oil Pump As

• 331-8906 Engine Oil Pump Gp