- Engine:
- G3606 (S/N: 3XF1-UP; 4ZS1-UP)
- G3608 (S/N: 4WF1-UP)
- G3608 SI TA (S/N: BEN1-UP)
- G3612 SI TA (S/N: BKE1-UP)
- G3612 (S/N: 1YG1-UP)
- G3616 SI TA (S/N: BLB1-UP)
- G3616 (S/N: 4CG1-UP)
Vent lines for the G3600 jacket water and auxiliary systems allow entrapped air to vent from the following places: the cylinder block, turbocharger housing and aftercooler upward to the expansion tank. The vent lines are supplied by the customer.
The lines are custom fitted during the installation and are tailored to the customer site conditions and requirements. Improper design of the engine venting system, including support, substructures, strain relief, careless installation, or maintenance can result in unexpected vent line failures, coolant leaks, and potential fire.
There are serious potential hazards from a vent line break or leak near the hot turbocharger or hot exhaust manifolds. Vent lines failing will leak coolant. Once the water evaporates from the coolant mixture, the remaining glycol can ignite and burn. Coolant soaked exhaust blankets will smolder and potentially ignite unless the glycol is diluted sufficiently to prevent ignition. Remove and replace coolant soaked exhaust blankets to ensure operator and site safety.
Refer to G3600 OEM Guide, LEBW0011, "System Venting" for detailed installation guidelines for the vent lines. Refer to Commissioning News, LEBW4987 for additional information.
| NOTICE |
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A failed coolant vent line may spray coolant on to the turbocharger or other surfaces hot enough to cause ignition. The ignition could cause a fire which could result in personal injury or even death. |
| NOTICE |
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Inspect vent line fittings on the engine frequently for tightness. Check vent line mountings for tightness, rubbing, or chafing. Repair loose tubing or pipe clamps as soon as possible to prevent breakage. |
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| Illustration 1 | g03737006 |
Typical example of a stainless steel braided fluid hose | |
Connections to the engine components should be made with a stainless steel braided fluid hose of the proper pressure and temperature rating. Using a flexible braided hose will result in the best isolation of vibration from the engine.
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| Illustration 2 | g03737396 |
Typical example of a vent line support | |
The supports and clamps for the vent line tubing should be robust and solid in order to prevent the tubing from vibration during operation. The support and strain relief should also protect the tubing vent line from damage/distortion if stepped on by personnel while performing maintenance. High temperature elastomeric clamps should be use to secure the tubing. Elastomeric clamps are available that withstand up to 200° C (392° F) for a wide array of tubing sizes. Evaluate the temperature of the environmental that these parts will be used in. Direct metal to metal contact is not recommended and increases the risk for wear on the tubing from vibration.
The on-engine portion of the vent line can be larger than 10 mm (0.375 inch) in order to have the strength to resist the engine vibration. The vent line should be supported and retained. An example of a suitable support is shown in Illustration 2. The fittings that adapt to the 10 mm (0.375 inch) tubing or tubing fittings will serve to keep the coolant flow rate at an acceptable level.
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| Illustration 3 | g03737400 |
Typical example of a flexible stainless steel fluid hose connection to the 10 mm (0.375 inch) tubing | |
An example of connecting to the 10 mm (0.375 inch) tubing is shown in Illustration 3. The connection shown is at the front of the engine away from the turbocharger. Provide on engine support for the tubing as well.
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| Illustration 4 | g03737515 |
Supporting the vent tubing from above the engine using a standalone support structure ensures that vibration is isolated to the flexible stainless steel fluid hose.
As an added safety measure of preventing coolant from spraying from a leak source, apply a screening tape to the connection after the connection has been properly tightened. The tape is especially recommended of connections near the turbocharger or exhaust manifold. The tape will prevent spraying if the joint should work loose or fatigues due to vibration. Although the tape will prevent coolant spray, coolant may still leak from the tape. The tape should be applied so that potential leaks will not fall on a hot surface or a heat source.
| Screening Tape | |
|---|---|
| Part Number | Width |
| 237-3859 Tape | 35 mm (1.4 inch) |
| 237-3860 Tape | 50 mm (2 inch) |
The tape is available in rolls that are 10 m (33 ft) The tape can be applied easily to a connection. A single wrap is sufficient to seal a joint from spray. A clear film must be peeled off the adhesive side of the tape before the tape is applied to a joint. The foil side of the tape will be visible after the application of the tape. The tape is good for use in temperatures from −54 to 150° C (−65 to 300 ° F).
Make the inspection of the coolant vent lines a part of the routine maintenance inspections. Inspect for tubing rubbing and secureness in the supports. Check the fittings for correct tightness. Visibly inspect for any signs of fatigue cracking due to vibration. By being proactive in the proper design and installation of coolant vent lines, and by making inspection a part of the preventive maintenance, many coolant vent line leaks potentially causing fires can be prevented.