Inspection and Installation of Oil Cooler for Yuchai Generator Set

All the oil coolers used in Yuchai products are plate - fin type. The inner layer is the core plate 6, which serves as the oil cooling circulation passage. There is an oil bypass valve installed on it, and the opening pressure of the bypass valve is 0.55 MPa. Outside the core plate is the cooling water chamber. Part of the water from the water tank circulates through the chamber to reduce the oil temperature. See the figure below.

1.Radiator cap 2.Gasket (III) 3.Bolt M10×35 4.Gasket (I) 5.Gasket (II) 6.Core plate 7.Oil outlet connector 8.Radiator cap 9.Drain switch 10.Bypass valve spring 11.Bypass valve plug 12.Bypass valve ball

1. Cleaning

The key is to clean the oil passages inside the plates. Pour diesel into the core plate and shake it several times for cleaning. Remove the bypass valve and clean its spring and inner hole. However, note the number of turns when unscrewing the plug. When installing, the number of turns for screwing in must be the same to avoid changing the opening pressure.

2. Inspection

During use, if oil is found in the water, check whether the core plate is desoldered. The method is to block the oil outlet of the core plate, inject air at 0.3 MPa from the oil inlet at the other end, and check for air leakage in the water.

3. Installation

The oil cooler of the Yuchai generator set is relatively long. When installing, ensure that the sealing gasket is not twisted. Tighten the fastening bolts twice, starting from the middle and moving towards both ends.

4. Common faults of the Yuchai generator set oil cooler

· Core plate leakage: In this case, there is oil in the water tank, which is caused by desoldering or false soldering at the copper tube joints of the core plate.

· Cracks in the housing or damaged sealing gaskets.

Note: In extremely cold winter weather, drain the water from the cooler to prevent it from freezing and cracking.

Guangxi Dingbo Power Equipment Manufacturing Co.,Ltd was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. The company has a registered capital of 218.88 million yuan. The company covers an area of 86,000 square meters and a building area of 55,000 square meters. There are more than 660 employees, including 456 professional technicians and 106 senior technicians. It has 46 sales and service outlets nationwide. The main products are diesel engines, generator sets, and diesel generators, providing users with a one-stop service of design, supply, debugging and maintenance at any time. Dingbo has always insisted on using first-class talents, building first-class enterprises, manufacturing first-class products, creating first-class services, and making every effort to build a first-class domestic enterprise. If any question please feel free to visit our website https://www.dieselgeneratortech.com/ or send email to [email protected].