MAINTENANCE SECTION 2 Page 27 EVERY 1500 HOURS SERVICE * Maintenance for every 50, 100. 250 and 500 hours should be carried out at the same time VALVES AND INJECTORS 1. Valves and injectors must be correctly adjusted for the engine to operate efficiently. Valve and injector adjustment must be performed using the values listed in this section. Valve and Injector Adjustment Limits “Top Stop” Injector Preload: 5.75-6.9 kg-cm Adjust the valves and the injectors at 1,500 hours or 1 year maintenance interval. Also, check adjustment after any major repair. mm in Intake valve 0.35 0.014 Exhaust valve 0.68 0.027 2.
If valve and injector adjustment is checked troubleshooting or before the 1,500 hours, or 1 year scheduled maintenance interval, adjustment is not required if measurements are within the recheck limits. Valve and Injector Recheck Limits Refer to the LlO Troubleshooting and Repair manual, Bulletin No. 3810246, for valve and injector adjustment procedures, or contact a Cummins Authorized Repair location to perform this service. “Top Stop” Injector Preload: 0.00 to 0.05 mm [O.OOO to 0.0002 in.] Lash Intake valve 0.10 to 0.41 0.004 to 0.016 mm in Exhaust valve 0.46 to 0.76 0.018 to 0.030