- Off-Highway Truck/Tractor:
- 793C (S/N: 4GZ1-UP; 4AR1-UP; ATY1-UP)
- 793 (S/N: 3SJ1-UP)
- 793B (S/N: 1HL1-UP)
The boss for the fill vent on the floating aftercoolers may leak coolant into the air system on on machines that are listed above.
Venting is not required for the 210-2582 Aftercooler Core As. The vent lines have been removed from the floating aftercooler.
The removal of the vent lines is effective with the following serial numbers in Table 1.
| Effective Serial Numbers |
| S/N:ATY00830-UP |
| S/N:7TR01590-UP |
| S/N:2PK01626-UP |
Table 2 lists parts that are required for the removal of the vent lines.
| Required Parts | |
| Quantity | Part |
| 2 | 1N-5999 Plug |
| 2 | 7J-0204 O-Ring Seal |
| 2 | 214-6010 Cover |
| 2 | 9X-3979 O-Ring Seal |
| 1 | 6V-9829 Cap As |
Use the following procedure to remove the vent lines. Make sure that all the required parts are available prior to performing this procedure.
- Drain the coolant circuit for the aftercooler into a suitable container.
- Remove the parts that are shown in Illustration 1. The parts will not be reused.
 | |
| Illustration 1 | g01119208 |
Top view of the coolant vent lines for the aftercooler (1) Swivel tee (2) Hose assembly (3) Elbow (4) Clamp, Bolt, Hard washer, and Nut (5) Hose assembly | |
- Remove the parts that are shown in Illustration 2 for area (A) and for area (B). Retain bolts (8) and hard washers (9) for later use.
 | |
| Illustration 2 | g01119424 |
View of area A and area B with the hose assemblies and fittings removed (6) Connector (7) O-ring (8) 0S-1617 Bolts (9) 9M-1974 Hard Washers (10) Adapter (11) O-ring | |
- Look in the hole of the former location of adapter (10). Look for any signs of coolant leakage around the boss. Replace the aftercooler core if a leak is detected.
- Install a new O-ring seal (13) onto plug (12). Lubricate the O-ring seal with glycerin. Install the plug into the vent boss of the aftercooler.
Torque ... 20 ± 2 N·m (15 ± 1 lb ft)
 | |
| Illustration 3 | g01119427 |
View of area A and area B with the plug and cover installed (12) 1N-5999 Plug (13) 7J-0204 O-Ring Seal (14) 214-6010 Cover (11) 9X-3979 O-Ring Seal (8) 0S-1617 Bolts (9) 9M-1974 Hard Washers | |
- Install a new O-ring seal (11) and (14). Install bolts (8) and hard washers (9) that were retained.
- Hose assembly (5) was once connected to a fitting at area (C). Use a 6V-9829 Cap As to cap the fitting at area (C). Refer to Illustration 1.
- Fill the system with coolant and check for leaks.