GASKET 1S7057 - Caterpillar

Clean the cooling system and flush the cooling system before the recommended maintenance interval if the following conditions exist:
The engine overheats frequently.
Foaming is observed.
The oil has entered the cooling system and the coolant is contaminated.
The fuel has entered the cooling system and the coolant is contaminated.When the cooling system is cleaned, only clean water is needed when the ELC is drained and replaced.Note: Inspect the water pump and the water temperature regulator after the cooling system has been drained. This is a good opportunity to replace the water pump, the water temperature regulator and the hoses, if necessary.
The high voltage that is produced by an operating generator set can cause severe injury or death. Before performing any maintenance or repairs, ensure that the generator will not start.Place the engine control switch in the "OFF" position. Attach "DO NOT OPERATE" tags to all starting controls. Disconnect the batteries or disable the starting system. Lock out all switchgear and automatic transfer switches that are associated with the generator.
Pressurized System: Hot coolant can cause serious burns. To open the cooling system filler cap, stop the engine and wait until the cooling system components are cool. Loosen the cooling system pressure cap slowly in order to relieve the pressure.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Drain
Note: Stop the engine and allow the engine to cool before draining the coolant. Begin with step 3 for open generator sets.
Illustration 1 g00954159
C2.2 is shown.
Turn fasteners (1) on the inside of the enclosure in a counterclockwise direction in order to loosen the fasteners. Note: The top panel on the enclosure for the C1.5 has four fasteners.
Illustration 2 g00954171
Remove the top panel (2) that is toward the front of the generator in order to access the cooling system filler cap. Tilt the front of the panel upward. Pull the panel toward the front of the unit. This will disengage the pins (3) from the frame of the enclosure.
Illustration 3 g00954800
Loosen the cooling system filler cap (4) slowly in order to relieve any pressure. Remove the cooling system filler cap (4) .
Illustration 4 g00946927
Typical example (5) Drain plug for the cylinder block
Illustration 5 g01040946
Typical example (6A) Drain plug for the heat exchanger on the C2.2 genset (6B) Drain plug for the heat exchanger on the C1.5 genset
Open the cooling system drain valve (if equipped). If the cooling system is not equipped with a drain valve, remove the cooling system drain plugs.The drain plug for the cylinder block is located on the right side of the engine. Remove the drain plug (5) from the cylinder block.