60 SENR9977 Testing and Adjusting Section 5. Rotate the crankshaft by hand in order to ensure that the crankshaft is not stuck. Check the oil viscosity and any external loads that could affect the engine rotation. 3. Place a suitable ammeter on the power supply wire. 4. Connect a suitable digital multimeter to the terminal on the glow plug and to a suitable ground. a. If the crankshaft is stuck or difficult to turn, repair the engine. 5. Turn the switch to the ON position in order to activate the glow plugs. b. If the engine is not difficult to turn, go to Step 6. 6. Attempt to crank the starting motor. Table 11 a. The starting motor cranks slowly.
Remove the starting motor for repair or replacement. b. The starting motor does not crank. Check for the blocked engagement of the pinion gear and flywheel ring gear. Note: Blocked engagement and open solenoid contacts will give the same electrical symptoms. Table 12 i01911231 Glow Plugs - Test Continuity Check of the Glow Plugs 6. Check the reading on all of the glow plugs. The following test will check the continuity of the glow plugs. 7. If there is no reading on the ammeter check the electrical connections. If the readings on the ammeter are low replace the glow plugs. If there is still no reading replace the glow plugs. 1. Disconnect the power supply and the bus bar. 2.
Use a suitable digital multimeter to check continuity (resistance). Turn the audible signal on the digital multimeter ON. 3. Place one probe on the connection for the glow plug and the other probe to a suitable ground. The digital multimeter should make an audible sound. Replace the glow plug if there is no continuity. 4. Check the continuity on all the glow plugs. Checking The Operation of The Glow Plug The following test will check the operation of the glow plugs. 1. Disconnect the power supply and the bus bar. 2. Connect the power supply to only one glow plug. 12 Volt System Amp Time (sec) 30 Initial 21 4 14 8 10 20 9 60 24 Volt System Amp Time (sec) 12 Initial 8.5 8 7 20 6 60