Usage:
3406B ( 7FB ) Truck Engines
Description of Change: New dipsticks are used in 3406B Truck Engines that have either the 7C4029 or 7W4460 Oil Pan Group used in trucks with set-back front axles. The new dipsticks do not have the traditional "Full" mark. Instead they have a "Full Range". See the illustration. These new dipsticks are necessary because of the many different engine installations; tilted either front-to-back or side-to-side. Use the "Oil Level Gauge (Dipstick) Marking Procedure" that follows to be sure the "Add" and "Full" marks on the dipstick are correct for each application.
Adaptable To: The new 7C4024 Oil Level Gauge (Dipstick) is used with the 7W4460 Oil Pan Group (rear sump). The new 7W7776 Oil Level Gauge (Dipstick) is used with the 7C4029 Oil Pan Group (front sump). These oil pan groups are used on 3406B Engine applications in trucks with set-back front axles.
New and earlier dipsticks.
Oil Level Gauge (Dipstick) Marking Procedure
Use this procedure to calibrate "Full Range"dipsticks used on 3406B Truck Engines. A convenient time to calibrate the dipstick is at the first oil change.
1. Park the truck on a level surface. Run the engine until it reaches normal operating temperature and shut off.
2. Drain the oil and change the oil filter.
3. Add 30.3 Liter (32 qt) of oil to the crankcase.
4. Run the engine until it reaches normal operating temperature and shut off.
5. Allow a minimum of 30 minutes for the oil to drain back into the sump.
6. Check the oil level on the dipstick. The oil level should be at the "Add"mark. If it is not, mark the oil level on the dipstick. This is the correct "Add" mark.
7. Add an additional 3.8 Liter (4 qt) to the sump. After allowing time for the oil to drain into the sump, check the oil level. The oil level is at the location on the dipstick that should be marked as "Full".