Compatible — Water and SCA

For these models: 3412C Generator Set DJN1-Up, 3412C Generator Set TGC1-Up.

Procedure

1. Slowly loosen the cooling system filler cap in order to relieve the pressure. Remove the cooling system filler cap. Note: Always discard drained fluids according to local regulations.
2. If necessary, drain some coolant from the cooling system into a suitable container in order to allow space for the extra SCA.
3. Add the proper amount of SCA. Refer to the Special Publication, SEBU6251, “Caterpillar Commercial Diesel Engines Fluids Recommendations” for more information on SCA requirements.
4. Clean the cooling system filler cap. Inspect the gaskets of the cooling system filler cap. If the gaskets are damaged, replace the old cooling system filler cap with a new cooling system filler cap. Install the cooling system filler cap. i03645060 Cooling System Water Temperature Regulator - Replace SMCS Code: 1355-510 Replace the water temperature regulator before the water temperature regulator fails. This is a recommended preventive maintenance practice. Replacing the water temperature regulator r
5. Remove the cover. Remove the primary air cleaner element.
6. The secondary air cleaner element should be removed and discarded for every three cleanings of the primary air cleaner element. Note: Refer to “Cleaning the Primary Air Filter Elements”.
7. Cover the turbocharger air inlet with tape in order to keep dirt out.
8. Clean the inside of the air cleaner cover and body with a clean, dry cloth.
9. Remove the tape for the turbocharger air inlet. Install the secondary air cleaner element. Install a primary air cleaner element that is new or cleaned.
10. Install the air cleaner cover.
11. Reset the service indicator. Cleaning the Primary Air Cleaner Elements The primary air cleaner element can be used up to six times if the element is properly cleaned and inspected. When the primary air cleaner element is cleaned, check for rips or tears in the filter material. The primary air cleaner element should be replaced at least one time per year. This replacement should be performed regardless of the number of cleanings. Use clean primary air cleaner elements while dirty elements are bein
12. Place the primary air cleaner element into a wash tank so that the gasket is up. The wash tank should be equipped with a rack so that the primary air cleaner element does not sit on the bottom of the wash tank. Note: Caterpillar does not recommend a process for washing the primary air cleaner element which includes vigorously shaking. By vigorously shaking the element, carbon particles may be distributed.
13. Fill the wash tank with the cleaning agent and warm water to a maximum temperature of 60°C (140°F). Follow the manufacturers recommendations for the cleaning agent. Allow the primary air cleaner element to soak for six hours.
14. Drain the wash tank. Do not use the cleaning agent more than one time. Remove the primary air cleaner element from the wash tank. Rinse the primary air cleaner element with the method for using pressurized water. Note: Refer to “Drying the Primary Air Cleaner Elements”. Refer to “Inspecting the Primary Air Cleaner Elements”. Drying the Primary Air Cleaner Elements The oven method may be used in order to dry primary air cleaner elements. If an oven is used, do not expose the primary air cleaner e
15. Loosen hose clamp (1) and remove the hose from breather assembly (2).
16. L oosen retaining clamp (3). Remove the breather assembly and seal (4).
17. Wash the breather element in solvent that is clean and nonflammable. Allow the breather element to dry before installation.
18. Install a breather element that is clean and dry. Install the seal, the breather assembly, and the clamp. Refer to the Specifications, SENR3130 in order to locate the proper torques.
19. Install the hose. Install the hose clamp. Refer to the Specifications, SENR3130 in order to locate the proper torques. SEBU7125-09 113 Maintenance Section Engine Mounts - Inspect i02139969 Engine Mounts - Inspect SMCS Code: 1152-040 Inspect the engine mounts for deterioration and for proper bolt torque. Engine vibration can be caused by the following conditions: • Improper mounting of the engine • Deterioration of the engine mounts Any engine mount that shows deterioration should be replaced. Re
20. Maintain the oil level between “ADD” mark (Y) and “FULL” mark (X) on oil level gauge (1). Do not fill the crankcase above “FULL” mark (X). NOTICE Operating your engine when the oil level is above the “FULL” mark could cause your crankshaft to dip into the oil. The air bubbles created from the crankshaft dipping into the oil reduces the oil's lubricating char- acteristics and could result in the loss of power.
21. Remove the oil filler cap and add oil, if necessary. Clean the oil filler cap. Install the oil filler cap. i03542996 Engine Oil Sample - Obtain SMCS Code: 1000-008; 1348-554-SM; 7542-554-OC, SM In addition to a good preventive maintenance program, Caterpillar recommends using S·O·S oil analysis at regularly scheduled intervals in order to monitor the condition of the engine and the maintenance requirements of the engine. S·O·S oil analysis provides infrared analysis, which is required for determini
22. Remove the oil filter with a 1U-8760 Chain Wrench.
23. Cut the oil filter open with a 175-7546 Oil Filter Cutter Gp. Break apart the pleats and inspect the oil filter for metal debris. An excessive amount of metal debris in the oil filter may indicate early wear or a pending failure. Use a magnet to differentiate between the ferrous metals and the nonferrous metals that are found in the oil filter element. Ferrous metals may indicate wear on the steel and cast iron parts of the engine. Nonferrous metals may indicate wear on the aluminum parts, brass par

Source: manual:SEBU7125-09+M.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.