Preliminary Requirements

Procedure

1. SUBTASK 72-00-00-620-051 Prepare the Inhibiting Rig

   1. Refer to Figure.

   2. 

      WARNING

      DO NOT APPLY AN AIR PRESSURE MORE THAN 50 PSIG (345 KPA) TO THE RIG.

      DO NOT LET THE MINERAL OIL STAY ON YOUR SKIN FOR A LONG TIME.

      Remove the adapter cap and attach the oil delivery hose to the oil outlet connector.

   3. Turn the handle in the micro disc filter to clear the filter element.

   4. Make sure the air pressure in the reservoir is at zero.

      1. Push the lever down on the safety valve.

   5. Fill up the IAE 1R18757 Inhibiting rig 1 off reservoir.

      1. Remove the oil filling plug.

      2. Fill the reservoir with CoMat 10-103 MINERAL OIL or CoMat 10-103A MINERAL OIL or CoMat 10-103B MINERAL OIL until a maximum of 8 gal (36.4l) is shown in the sight tube.

      3. Install the oil filling plug.

   6. Make sure the regulator valve is closed. Connect the external air supply to the air coupling.

   7. Remove the moisture from the air filter.

      1. Remove the drain valve from the base of the air filter.

      2. Drain the moisture from the air filter.

      3. When there is no more moisture in the air filter replace the drain valve and safety the valve.

   8. Open the regulator valve to permit air pressure to increase until 25 psig (172 KPa) is shown on the pressure gage.

   9. Make sure the hose is not contaminated.

      1. Use a suitable container and put the end of the oil delivery hose in the container.

      2. Open the shut-off valve to permit a small quantity of mineral oil to flow through the hose, approximately 0.2 gal (0.9l).

      3. Close the shut-off valve.

2. SUBTASK 72-00-00-620-057 Prepare the Engine for Inhibiting in the Transportation Stand

   1. Refer to Figure.

   2. 
      CAUTION
      UNWANTED MATERIAL MUST NOT GO INTO THE FUEL SYSTEM.

      NOTE

      1. If the engine is installed with hose 175 FUEL SYSTEM TUBES (FLEXIBLE)-POWER PLANT (73-11-48, 01-010) and hose 176

         FUEL SYSTEM TUBES (FLEXIBLE)-POWER PLANT (73-11-48, 01-040) do steps A and B.

      2. If the engine is not installed with hose 175 FUEL SYSTEM TUBES (FLEXIBLE)-POWER PLANT (73-11-48, 01-010) and hose 176

         FUEL SYSTEM TUBES (FLEXIBLE)-POWER PLANT (73-11-48, 01-040) do step B.

      Engine installed with hoses 175 and 176.

      1. Remove hose 175 and hose 176.

      2. Cover the two hoses with CoMat 12-033 AIR BUBBLE SHEET.

      3. Attach the two hoses to the fan case struts with CoMat 02-041 MOISTURE RESISTANT TAPE.

   3. Engine not installed with hoses 175 and 176.

      1. Attach IAE IAE 1R18685 Inhibiting rig adapter 1 off to the main fuel inlet pipe union.

      2. Tighten the adapter.

      3. Connect the oil delivery hose to the adapter and tighten.

   4. NOTE

      If the engine cannot be turned, step D must not be done.

      Install the rotator kit, Figure.

      1. NOTE

         1. As an alternative the engine can be turned by the use of standard hand tools.

         2. The crank cover is on the front face of the external gearbox between the dedicated alternator and the pneumatic starter.

         Remove the crank cover ENGINE-MAIN GEARBOX CASE AND FITTINGS (72-60-21, 01-220) from the external gearbox.

         1. Remove the two nuts and washers which attach the crank cover to the external gearbox.

         2. Remove the crank cover and remove and discard the packing.

      2. Install the IAE 2F10057 Rotator Kit or IAE 2F10066 Rotator Kit 1 off.

         1. Align the holes on the flange of the rotator kit with the studs on the external gearbox.

         2. Install the rotator kit to the external gearbox. Make sure that the rotator kit engages with the hexagonal end of the starter idler gear.

         3. Install the two washers ENGINE-MAIN GEARBOX CASE AND FITTINGS (72-60-21, 01-260) and the two nuts ENGINE-MAIN GEARBOX CASE AND FITTINGS (72-60-21, 01-240). Tighten the two nuts.

         4. Put a container below the HP fuel pump.

         5. Remove the four bolts that attach tube 102 Control Fuel Tubes (73-11-49, 05-100) to the HP fuel pump. Pull tube 102 to allow clearance between the tube and the HP fuel pump.

         6. Remove 73-11-49,05-116 seal ring 1 off and replace with a new seal ring.

3. SUBTASK 72-00-00-620-058 Inhibit the Engine Fuel System in the Transportation Stand

   1. NOTE

      Make sure the rotator kit turns the starter idler gear in a clockwise direction as you view the engine from the front.

      Make sure 25 psi (172 KPa) is shown on the pressure gage.

   2. If the engine can be turned, turn the engine.

   3. Open the shut-off valve on the inhibiting rig.

   4. When clean mineral oil flows from tube 102, stop the rotator.

   5. Close the shut-off valve.

   6. Disconnect the air supply.

   7. Re-install tube 102.

4. SUBTASK 72-00-00-620-059 Disconnect the Inhibiting Rig and Rotator Kit

   1. Disconnect the inhibiting rig.

      1. Disconnect the inhibiting rig delivery hose from the adapter.

      2. Remove the adapter.

      3. Attach IAE IAE 5R18311 Transportation cap 1 off to the main fuel inlet and tighten to safety.

   2. Remove the rotator kit from the external gearbox.

      1. Remove the two bolts and washers that attach the rotator kit to the external gearbox and remove the rotator kit.

      2. Lightly lubricate a new ENGINE-MAIN GEARBOX CASE AND FITTINGS (72-60-21, 01-280) packing 1 off with CoMat 10-077 APPROVED ENGINE OILS and install it on the crank cover ENGINE-MAIN GEARBOX CASE AND FITTINGS (72-60-21, 01-220).

      3. Attach the crank cover on the external gearbox with the two washers ENGINE-MAIN GEARBOX CASE AND FITTINGS (72-60-21, 01-260) and the two bolts ENGINE-MAIN GEARBOX CASE AND FITTINGS (72-60-21, 01-240). Torque the bolts to 85 to 105 lbf.in (10 to 12 Nm).

5. SUBTASK 72-00-00-620-060 Inhibit the Engine Fuel System in the Test Bed

   1. 

      WARNING

      DO NOT LET THE MINERAL OIL STAY ON YOUR SKIN FOR A LONG TIME.

      

      CAUTION

      UNWANTED MATERIAL MUST NOT GO INTO THE FUEL SYSTEM.

      Operate the engine as required until the oil temperature is 220 deg F (104 deg C) or more. Continue to operate the engine for 10 minutes.

   2. Disconnect the main fuel inlet line to the fuel pump inlet.

   3. Drain the fuel system.

   4. Connect the main fuel inlet line to a supply of CoMat 10-103 MINERAL OIL or CoMat 10-103A MINERAL OIL or CoMat 10-103B MINERAL OIL oil at an inlet pressure of 5 to 50 PSIG (34.5 to 344.7 KPA) and a minimum temperature of 60 deg.F. (15.6 deg.C.).

   5. Make sure that unwanted material does not go in the fuel system. Equipment must be provided with filters or strainers that have mesh no coarser than 40 micron.

   6. Wet motor the engine until mineral oil vapor goes out of the tailpipe.

   7. Disconnect the supply of mineral oil.

   8. Drain the excess mineral oil.

   9. Attach the IAE IAE 5R18311 Transportation cap 1 off to the main fuel inlet and tighten to safety.

   10. Remove the engine from the test bed. Refer to TASK 71-00-00-700-021.

Figure: Inhibiting rig

Inhibiting rig



Figure: Install the rotator kit

Install the rotator kit



Figure: Connect hoses 175 and 176

Connect hoses 175 and 176