TUBE AS 3711174 - Caterpillar

Illustration 1 g01106118
Top viewInstallation of a protective sleeve for the hoses of the pumps (1) of the HEUI Fuel System is now used. If this hose fails, there is a possibility that fuel could spray onto hot engine parts. A leak can be caused by abrasions to the surface of the hose or by damage to the braided exterior of the hose. The PTFE liner of the hose can be damaged if the hose has been bent.
Illustration 2 g01106117
The 258-8917 Sleeve (3) is a spray protective sleeve. The sleeve has been developed in order to wrap the sleeve around the 162-2501 Hose As (2) .Note: The writing on the sleeve must be facing outward when the sleeve is installed. If a leak would occur, the sleeve would prevent the oil from spraying onto hot surfaces of the engine. The sleeve directs the oil to the "V" of the cylinder block. If the leak continues and the leak grows in volume the leak will cause decreased pressure with the pump. Issues with the engine performance will then be experienced.
Illustration 3 g01106120
Illustration 3 shows the routing of the 162-2501 Hose As (2). The hose is routed from the rail, around the rear of the fuel transfer pump (5), and into the 90 degree fitting (4) that is installed into the pump.Note: Ensure that the 162-2501 Hose As is inspected for wear. If the hose shows any signs of wear, replace the hose.Note: Do not remove the hose from the engine in order to install the sleeve. Install the sleeve with the hose on the engine.
Illustration 4 g01106121
Illustration 4 shows the 258-8917 Sleeve (3) once the sleeve is installed on the 162-2501 Hose As (2). After the sleeve is installed, ensure that the writing that is on the sleeve is facing outward. Slide the sleeve between the hose and the fuel transfer pump that is located at the rear of the pump. Once the sleeve is in place, be sure that the VELCRO on the sleeve is as even as possible throughout the length of the sleeve. Also, ensure that the VELCRO part of the sleeve faces downward.
Illustration 5 g01106124
The D9R machines that have a 3408 engine use a high mount aftercooler. The mounting bracket (6) is located close to the 162-2501 Hose As (2). If there is not enough clearance to install the sleeve, the hose will need to be loosened and the hose will need to be repositioned. Refer to Illustration 6 for the procedure of repositioning the hose.
Illustration 6 g01106126
The hose must be realigned if any of the following conditions exist:
Not enough clearance against the fuel transfer pump
Not enough clearance against the support bracket
Loosen the end of the hose (8) .
Loosen the elbow and the jam nut (7). Note: Do not remove the hose.
Reposition the hose in order to acquire the desired clearance.
Hold the end of the hose (8). Tighten the jam nut (7) .Tighten the jam nut to the following torque. ... 143 15 N m