Series 60 DDEC V Troubleshooting – Section 4.7 Low Cranking Speed

Section 4.7
Low Cranking Speed

To determine if low cranking speed is causing starting difficulty, perform the following steps:‪

1. Install a tachometer to the engine.
2. Record engine revolution while cranking the engine; refer to OEM for guidelines.
   1. If the cranking speed is greater than 100 rpm, check the fuel supply valve; refer to "4.8 Fuel Supply Valve" .
   2. If the cranking speed is less than 100 rpm; refer to "4.7.1 Low Cranking Speed Repair" .

Section 4.7.1
Low Cranking Speed Repair

Perform the following steps for low cranking speed repair:‪

1. Drain the engine oil; refer to the appropriate service manual, preventive maintenance engine chapter.
2. Remove oil filter(s); refer to the appropriate service manual, preventive maintenance chapter.
3. Install new oil filter(s); refer to the appropriate service manual, preventive maintenance chapter.
4. Refill the lubrication system with new oil; refer to the appropriate service manual, preventive maintenance chapter.
5. Verify low cranking speed repair; refer to "4.7.1.1 Test Engine with Replaced Oil" .

Section 4.7.1.1
Test Engine with Replaced Oil

To determine if the replaced oil resolved starting difficulty, attempt to start and run the engine.‪

1. If the engine starts and runs, no further troubleshooting is required. Shut down the engine.
2. If the engine fails to start and run, check the fuel supply valve; refer to "4.8 Fuel Supply Valve" .