- Off-Highway Truck:
- 793FSeries AC (S/N: EMD1-UP)
- 793F (S/N: SND1-UP; SSP1-UP; RBT1-UP)
- 795FSeries AC (S/N: ERM1-UP)
- 795F (S/N: SNT1-UP)
Description of Change: The new coolant tube assemblies do not have welded bosses for the vent line. The vent line now attaches to the 260-8447 Elbow and the 293-5021 Elbow .
Adaptable To: The new coolant tube assemblies replace the existing new coolant tube assemblies.
The new coolant tube assemblies are adaptable to the above engines back to first production.
Note: The 380-1423 Elbow must be installed to be compatible with this tube update.The new parts and former parts are listed in Table 1.
| New Part | Former Part | Qty |
|---|---|---|
| 452-3043 Tube As | 394-1118 Tube As | 1 |
| 458-6019 Hose As | - | 1 |
| 458-6511 Tube As | 380-1425 Tube As | 1 |
 | |
| Illustration 1 | g03676183 |
Former design (1) 394-1118 Tube As (2) 380-1425 Tube As (3) 380-1423 Elbow | |
 | |
| Illustration 2 | g03675939 |
New design for 793F and 795F (3) 380-1423 Elbow (4) 458-6019 Hose As (5) 452-3043 Tube As (6) 458-6511 Tube As | |
The effective engine serial numbers are listed in Table 2.
| Effective Engine Serial Numbers |
|---|
| S/N:JTL01124-UP |
| S/N:B7C01004-UP |
| S/N:B7B01879-UP |
| S/N:ZK201112-UP |