Injection Actuation Pressure Control Valve Circuit

303

TM 9-2320-312-24-2

Troubleshooting Section

Test Step 16. Check the High Pressure

Expected Result:

Oil System for Leaks

The oil pressure is above 27.5 MPa (4000 psi).

Results:

Hot oil and components can cause personal in-

Yes The high pressure oil pump is working

jury.

properly. Proceed to Test Step 16.

Do not allow hot oil or components to contact skin.

No The high pressure oil pump may be faulty.

Proceed to Test Step 15.

A. Remove the valve cover and inspect the high

Test Step 15. Check the Drive Gear

pressure oil system for oil leaks.

A. Remove the high pressure oil pump.

B. While the engine is being cranked, look around

the injector bores for any signs of oil leakage.

B. Check for any physical damage to the drive

Inspect the injector spill ports for excessive oil.

gear. Replace the drive gear, if necessary.

All six injectors should spill the same amount of

oil.

C. Verify that the drive gear and the retaining bolt

are properly tightened. Also verify that the pump

Expected Result:

shaft rotates freely.

No leaks are apparent.

Expected Result:

Results:

The drive gear and the retaining bolt for the high

pressure oil pump are tight. The pump shaft rotates

OK Call technical support for assistance. STOP.

freely.

Not OK

Results:

Repair: Replace the O-ring on the injector or

Yes The drive gear bolt is properly tightened

replace the damaged injector.

and the pump shaft rotates freely.

STOP.

Repair: Replace the high pressure oil pump. If

this does not fix the problem, contact technical

support.

i01856379

Injection Actuation Pressure

STOP.

Control Valve Circuit - Test

No The pump shaft does not rotate freely.

SMCS Code: 5051-081

Repair: Replace the high pressure oil pump. If

this does not fix the problem, contact technical

System Operation Description:

support.

Use this procedure under the following situation:

STOP.

Use the following information in order to troubleshoot

No The drive gear bolt is loose. The pump shaft

the system when there is an active code:

rotates freely and there is no obvious mechanical

damage that would indicate a different failure.

42-11 Injection Actuation Pressure Control Valve

Driver (18)

Repair: Tighten the drive gear bolt to a torque of

110 14 Nm (80 10 lb ft). Check the pressure

Note: Do not use this procedure for an active

in order to ensure that the problem has been

diagnostic code of 164-11 Injection Actuation

resolved. If this does not fix the problem, replace

Pressure System unless you are directed to this

the high pressure oil pump.

procedure from the "Injection Actuation Pressure

- Test". If the diagnostic code of 164-11 Injection

STOP.

Actuation Pressure System is active, refer to

Troubleshooting, "Injection Actuation Pressure -

Test".