HOSE AS 3860733 - Caterpillar

Pressure Test
Ensure that you wear eye protection at all times during testing. When fuel injection nozzles are tested, test fluids travel through the orifices of the nozzle tip with high pressure. Under this amount of pressure, the test fluid can pierce the skin and cause serious injury to the operator. Always keep the tip of the fuel injection nozzle pointed away from the operator and into the fuel collector and extension.
Illustration 3 g00470020
5P-4150 Nozzle Testing Group
(1) 5P-7448 Adapter
(2) Fuel injection nozzle
(3) 6V-2170 Tube Assembly
(4) 1U-8857 Extension Tube
(5) 8S-2270 Fuel Collector
(6) 8T-5313 Filter
Do not use dirty test fluids when you test fuel injection nozzles. Also, do not test fuel injection nozzles unless you have the correct service tools.The use of dirty test fluids and the use of incorrect service tools will result in damage to fuel injection nozzles.
Note: This procedure is a test of the opening pressure of the fuel injection nozzle.
Connect fuel injection nozzle (2) to the tooling that is shown in Illustration 3. The spray from fuel injection nozzle (2) must be directed into 1U-8857 Extension Tube (4) and 8S-2270 Fuel Collector (5).Use clean 6V-6068 Calibration Fluid when the fuel injection nozzles are tested. The calibration fluid is similar to SAE J-967 (ISO 4113) oil.
Close the gauge protector valve. Close the shutoff valve. Open the pump isolator valve. Flush fuel injection nozzle (2) by operating the nozzle tester. Operate the nozzle tester for 10 to 15 strokes at a rate of approximately sixty strokes per minute.
Open the gauge protector valve. Slowly increase the pressure until the valve in fuel injection nozzle (2) opens. Note the highest pressure indication on the dial indicator before the pointer moves to 0 kPa (0 psi). This highest pressure indication is the opening pressure of fuel injection nozzle (2). The opening pressure occurs when the valve needle is lifted from the nozzle seat. Refer to Specifications, "Fuel Injection Nozzles" for the correct pressure settings. If the opening pressure is not within the range of the setting which is given in the table, fuel injection nozzle (2) must be replaced.Test for the Nozzle Spray Pattern
Ensure that you wear eye protection at all times during testing. When fuel injection nozzles are tested, test fluids travel through the orifices of the nozzle tip with high pressure. Under this amount of pressure, the test fluid can pierce the skin and cause serious injury to the operator. Always keep the tip of the fuel injection nozzle pointed away from the operator and into the fuel collector and extension.
Illustration 4 g00470020
5P-4150 Nozzle Testing Group
(1) 5P-7448 Adapter
(2) Fuel injection nozzle
(3) 6V-2170 Tube Assembly
(4) 1U-8857 Extension Tube
(5) 8S-2270 Fuel Collector
(6) 8T-5313 Filter The pressure adjustment must be correct before you test the spray pattern.This procedure tests for the correct spray pattern for fuel injection nozzles.
Connect fuel injection nozzle (2) to the tooling that is shown in Illustration 4. Position fuel injection nozzle (2) so that the direction of the