TM 9-6115-729-24
0013
ELECTRONIC TECHNICIAN (ET) TROUBLESHOOTING - Continued
CORRECTIVE ACTION - Continued
STEP 8.
Check the oil pressure at the fuel injection pump outlet port.
a. Locate the high pressure oil line that supplies high pressure oil to the cylinder
head.
b. Remove the oil line and install the 8T-0852 pressure gauge or equivalent to
the line or to the high pressure port (Figure 6, Item 5) at the pump. Crank the
engine and record the oil pressure that is indicated on the gauge.
NOTE
The pressure readings may vary between gauges.
(1) Observed pressure reading
(2) Observed RPM
(3) Observed injection actuation output percent
c.
If the oil pressure is above 27.5 MPa (4000 psi), remove the pressure gauge
from the engine. Proceed to STEP 12.
d. If the oil pressure is below 27.5 MPa (4000 psi). Proceed to STEP 9.
STEP 9.
Install a test plug and recheck the oil pressure.
a. Remove the injection actuation pressure control valve (IAPCV) (Figure 6,
Item 2) (WP 0102).
b. SPECIAL TEST. Install a 219-2368 plug (DIAGNOSTIC) and 9X-1484 seal
kit or equivalent and perform the pressure test at the fuel injection pump
outlet port. Using the DEAD CRANK SWITCH, crank the engine and record
the results.
NOTE
If the 219-2368 plug (DIAGNOSTIC) is not available, proceed to STEP 10. Install a New IAPCV
and check the oil pressure.
c.
If the oil pressure is above 27.5 MPa (4000 psi), the HEUI pump is OK.
Replace the IAPCV and recheck the oil pressure.
d. If the oil pressure is below 27.5 MPa (4000 psi). Remove the pressure gauge
from the engine. Proceed to STEP 11.
STEP 10.
Install a new IAPCV (WP 0102) onto the high pressure oil pump (part of fuel
transfer pump group).
a. Check the oil pressure at the fuel injection pump outlet port. Record the
pressure reading.
b. If the oil pressure is above 27.5 MPa (4000 psi), the replacement of the
IAPCV has corrected the problem. Remove the test equipment from the
engine. Verify that the repair has resolved the problem.
0013-28
