TM 10-4320-310-14
5-8. TEST INJECTION PUMP (Continued)
3
Connect testing device(3) to injection pump (4). Make sure side connections (2) are tightly locked.
4
Loosen the pressure gauge connection, and crank the engine until trapped air is removed from the system.
5
Tighten pressure gauge connection.
The pressure gauge can be damaged if the engine is cranked beyond the
gauge limits. Failure to heed this caution can damage equipment.
6
Slowly crank engine by hand. As the engine is cranked, read fuel injection pressure on the gauge. Injection
pressure should be 4351 to 5076 psi (300 to 350 bar). Stop cranking engine and observe whether pressure is
maintained. If pressure drops below 3650 psi (250 bar) within 10 to 15 seconds, then injection pump not in working
order.
7
Remove testing device (3).
5-14
