检查换热器锌塞，腐蚀严重时更换。更换频率取决于热交换器中循环的原水的化学反应。

Check the zinc plug of the heat exchanger and replace it in case of serious corrosion. The replacement frequency depends on the chemical reaction of the raw water circulating in the heat exchanger.

检查风扇是否安装牢固，必要时拧紧固定螺钉。检查风扇是否有嘎嘎声或弯曲的叶片。检查风扇轮毂和曲轴皮带轮是否安装牢固。检查风扇轮毂皮带轮是否松动和振动；如有必要，拆下风扇导向轮毂以拧紧轴上的螺母。拧紧风扇支架螺丝。

Check whether the fan is installed securely, and tighten the fixing screws if necessary. Check the fan for rattling or bent blades. Check that the fan hub and crankshaft pulley are securely installed. Check the fan hub pulley for looseness and vibration; If necessary, remove the fan guide hub in order to tighten the nut on the shaft. Tighten the fan bracket screws.

将百分表指针靠在扭转减震器或皮带轮的端面上，然后撬动减震器或皮带轮的内盖和前盖，检查端隙。当沼气安装在机组上并与变速器或变矩器一起安装时，必须有端部间隙。

Place the dial indicator pointer against the end face of the torsional shock absorber or pulley, and pry the inner cover and front cover of the shock absorber or pulley to check the end clearance. When biogas is installed on the unit together with transmission or torque converter, there must be end clearance.

蒸汽清洗是清洗肮脏的小型沼气发电机组或设备的有效方法。如果没有蒸汽，可以用指定的溶剂清洗沼气。不要受到冲洗喷嘴的全力冲击，并保护电气元件和电线。

Steam cleaning is an effective method to clean dirty small biogas generating units or equipment. If there is no steam, the biogas can be cleaned with the specified solvent. Do not be impacted by the full force of the flushing nozzle, and protect the electrical components and wires.

如果磨损的小型沼气发电机组的端部间隙超过表上的磨损极限，则不能使用。如果拆卸沼气进行维修，请安装新的止推环。注意：请勿撬动减震器外圈。

If the end clearance of the worn small biogas generator set exceeds the wear limit on the table, it cannot be used. If biogas is removed for repair, install a new thrust ring. Note: do not pry the outer ring of the shock absorber.

偶尔，沼气安装螺栓会松动，导致沼气悬架和支架快速磨损。因此，根据需要拧紧所有螺栓和螺母，更换损坏的，并弥补丢失的。

Occasionally, the biogas mounting bolts become loose, resulting in rapid wear of biogas suspension and support. Therefore, tighten all bolts and nuts as required, replace the damaged ones and make up for the missing ones.

此外，还应做好相关的维护工作，如：

In addition, relevant maintenance work shall be done well, such as:

加强沼气发电机组的维护保养：维护保养是延长沼气使用寿命的关键。应进行日常维护、定期维护和经常检查，检查冷却水、油是否充足，各沼气部门的技术状况是否良好。如有故障，应及时排除。“三滤”要干净、畅通。在农村尘土飞扬的环境中工作时，应每天清洁一次空气过滤器。其他保养也应按规定程序进行。

Strengthen the maintenance of biogas generator unit: maintenance is the key to prolong the service life of biogas. Routine maintenance, regular maintenance and regular inspection shall be carried out to check whether the cooling water and oil are sufficient and whether the technical conditions of each biogas department are in good condition. If there is any fault, it shall be eliminated in time. The "three filters" shall be clean and unblocked. When working in a dusty environment in rural areas, the air filter should be cleaned once a day. Other maintenance shall also be carried out according to the specified procedures.

沼气发电机组在磨合期内要注意保养：新的或大修过的沼气一定要磨合。由于沼气中相互配合和运动的零件表面具有一定的精度和光洁度，在徽记方面仍然不均匀，配合间隙过小。

Pay attention to the maintenance of the biogas generator unit during the running in period: the new or overhauled biogas must be run in. Because the surfaces of parts that cooperate and move with each other in biogas have a certain degree of precision and smoothness, the emblem is still uneven, and the fitting clearance is too small.

磨合的目的是使配合运动的表面更光滑，间隙更合理，以防止早期磨损。磨合的方法是空载运行50小时，期间转速由低变高，负载由小变大。不允许超速和过载运行。磨合完成后，必须更换曲轴箱内的机油，同时清洗曲轴箱及各润滑油路，同时清洗或更换机油滤芯。

The purpose of running in is to make the mating surface smoother and the clearance more reasonable, so as to prevent early wear. The running in method is no-load operation for 50 hours, during which the speed changes from low to high and the load changes from small to large. Overspeed and overload operation are not allowed. After the running in, the engine oil in the crankcase must be replaced, the crankcase and all lubricating oil circuits must be cleaned, and the engine oil filter element must be cleaned or replaced at the same time.

不要猛踩油门：沼气发动机热车猛踩油门，会引起剧烈震动，增加各配合面的摩擦力。冷车猛踩油门，因为润滑油太粘，不易流动，会加剧零件的磨损。严重时可能引起拉缸烧瓦、抱轴等严重事故。因此，无论车子冷热、高、中、低速，加油要平稳，不要连续猛踩油门。

Don't step on the accelerator violently: if the hot car of biogas engine steps on the accelerator violently, it will cause severe vibration and increase the friction of all mating surfaces. When the car is cold, step on the accelerator sharply, because the lubricating oil is too sticky and difficult to flow, which will aggravate the wear of parts. In serious cases, it may cause serious accidents such as cylinder pulling, Bush burning and axle holding. Therefore, no matter whether the car is hot or cold, high, medium or low speed, the refueling should be stable, and do not step on the accelerator continuously.

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