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曲轴轴颈上有裂纹和划痕的迹象是否有过热或变色迹象怎么办约翰迪尔John Deere柴油机

2022/8/26 15:10:20

曲轴轴颈上有裂纹和划痕的迹象是否有过热或变色迹象怎么办约翰迪尔John Deere柴油机

约翰迪尔John Deere柴油机连杆盖并拆下曲轴

1.使用JDG820JDE81-1飞轮车削工具旋转曲轴,直到可以轻松拆卸连杆盖。您将能够在每个位置拆下杆盖。

2.拆下所有连杆盖(A)和轴承(B),然后拆下1号和7号主轴承盖和轴承。请参阅第030组中的拆卸活塞和连杆组件。

拆卸约翰迪尔John Deere柴油机连杆盖

注意:曲轴非常重。制定适当的处理程序以避免受伤。

注意:在曲轴两端安装一个螺钉,以帮助提升曲轴。

3.如图所示,在约翰迪尔John Deere柴油机曲轴两端各安装一个带帽螺钉,并将吊带连接到曲轴上。使用适当的起吊设备,小心地将曲轴从缸体中抬起。

4.使用溶剂和压缩的安全气囊清洁曲轴,尤其是油道。

5.将约翰迪尔John Deere柴油机曲轴放在干净的V形块上。

6.使用以下方法之一从曲轴法兰上拆下后耐磨套(如果之前未进行):

•如本组前面所述,使用JDG790耐磨套拔出器从曲轴上拆下耐磨套。将约翰迪尔John Deere柴油机曲轴连杆轴颈放置在V形块中,以便在拆卸耐磨套时曲轴不会旋转。

•使用球头锤的球侧并敲击沿其宽度沿直线磨损套筒(使套筒变形和拉伸)。

•将耐磨套划伤(但不要切割)成几处用钝凿在外径周围。

检查曲轴

注意:如果在拆卸过程中发现曲轴减振器损坏,则应

麦格纳很困惑。这将验证其是否有微观裂纹或裂缝。请参阅本组中的检查减振器。

1.彻底清洁曲轴。清除所有油道的阻塞物。

2.检查曲轴轴颈上是否有负载应力、裂纹和划痕的迹象。同时检查每个轴颈是否有过热或变色迹象。如果存在任何一种情况,更换曲轴,因为热处理可能已损坏。

3.检查(前)曲轴齿轮和(后)油泵驱动齿轮是否有裂纹、齿屑或过度磨损。根据需要更换齿轮。见替换曲轴齿轮和更换(曲轴)检查约翰迪尔John Deere柴油机曲轴油泵驱动齿轮,本组后面。A杆轴颈孔和B轴颈圆角

4.检查键槽是否有裂纹或磨损迹象。必要时更换曲轴。

5.仔细检查约翰迪尔John Deere柴油机磨损套筒接触面区域的曲轴后轮毂是否存在粗糙或有槽的情况。此处的任何缺陷都会导致机油泄漏。可以用砂布或砂布清理轻微的隆起。

6.检查每个轴颈是否有过度过热或变色的迹象。如果存在任何一种情况,更换曲轴,因为热处理可能已损坏。

7.仔细检查曲轴连杆轴颈孔(A)和轴颈圆角(B)区域是否有裂纹。如果发现任何裂纹,请更换曲轴。

Remove Connecting Rod Caps and Remove Crankshaft

1.      Rotate crankshaft using JDG820 or JDE81-1 Flywheel Turning Tool until connecting rod caps can be removed easily. You will be able to remove rod caps at each position.

2.      Remove all connecting rod caps (A) with bearings (B), then remove No. 1 and 7 main bearing caps and bearings. See REMOVE PISTONS AND CONNECTING ROD ASSEMBLIES in Group 030.

Removing Connecting Rod Caps

CAUTION: Crankshaft is very heavy. Plan a proper handling procedure to avoid injury.

NOTE: Install a screw on each end of crankshaft to aid in lifting crankshaft.

3.      Install a cap screw in each end of crankshaft and attach a lifting strap to crankshaft as shown. Using proper lifting equipment, carefully raise crankshaft out of cylinder block.

4.      Clean crankshaft, especially oil passages, using solvent and compressed sir.

5.      Put crankshaft on clean V-blocks.

6.      Remove rear wear sleeve from crankshaft flange, if not previously done, using one of the following methods:

       Use JDG790 Wear Sleeve Puller to remove wear sleeve from crankshaft, as described earlier in this group. Position crankshaft rod journals in V-blocks so that crankshaft does not rotate while removing wear sleeve.

       Use the ball side of a ballpeen hammer and  tap

wear sleeve across its width in a straight line (to deform and stretch sleeve).

       Score (but do not cut) the wear sleeve in  several

places around O.D. with a blunt chisel.

Inspect Crankshaft

NOTE: If crankshaft damper damage was discovered during teardown, the crankshaft should be

magna-fluxed. This will verify whether of not it has microscopic cracks or fissures. See INSPECT VIBRATION DAMPER, in this group.

1.      Thoroughly clean crankshaft. Clear restrictions from all oil passages.

2.      Inspect crankshaft for signs of load stress, cracks, scratches on journals. Also check each journal for evidence of excessive overheating or discoloration. If either condition exists, replace crankshaft since heat treatment has probably been destroyed.

3.      Inspect (front) crankshaft gear and (rear) oil pump  drive gear for cracks, chipped teeth, or excessive wear. Replace gear(s) as required. See REPLACE

CRANKSHAFT GEAR and REPLACE (CRANKSHAFT) Inspecting Crankshaft

OIL PUMP DRIVE GEAR, later in this group.   A—Rod Journal Holes B—Journal Fillets

4.      Inspect the keyway for evidence of cracks or wear. Replace crankshaft as necessary.

5.      Carefully inspect rear hub of crankshaft in area of wear sleeve contact surface for evidence of rough or  grooved condition. Any imperfections here will result in oil leaks. Slight ridges may be cleaned up with emery  or crocus cloths.

6.      Check each journal for evidence of excessive overheating or discoloration. If either condition exists, replace crankshaft since heat treatment has probably been destroyed.

7.      Carefully check the crankshaft for cracks in the area of rod journal holes (A) and at journal fillets (B). Replace crankshaft if any cracks are found.

7820拖拉机的空气滤芯的清扫

大家可以看到,7820的空气滤芯同84209000系列的是完全不一样的,

从侧面看,842093209520等拖拉机的空气滤芯是环形的,而7820的是蜂巢状的,请问你用什么方法进行清扫呢?

诚然,你从何处也找不到清扫的地方,有的人会问:那如何清扫呢?

给你的答案是:不用清扫。株洲CATC1.1约翰迪尔John Deere柴油机原厂配件欢迎来电,福建Perkins帕金斯1206E-E66TA约翰迪尔John Deere柴油机连杆衬套一台多少钱,宿迁Perkins帕金斯1103D-33TA约翰迪尔John Deere柴油机曲轴箱配件商家,佳木斯Perkins帕金斯1506A-E88TAG3约翰迪尔John Deere柴油机曲轴中心,锦州Perkins帕金斯403F-07约翰迪尔John Deere柴油机喷油器欢迎来电,沧州Perkins帕金斯403D-15T约翰迪尔John Deere柴油机气门室盖罩哪家好,齐齐哈尔Perkins帕金斯4016TAG2A约翰迪尔John Deere柴油机水温机油压力转速传感器联系,长治CATC6.6柴油机原厂配件一台多少钱,鄂尔多斯Perkins帕金斯403D-15约翰迪尔John Deere柴油机连杆衬套网站,拉萨Perkins帕金斯1204E-E44TTAG2约翰迪尔John Deere柴油机配件联系电话联系,三沙Perkins帕金斯854E-E34TA约翰迪尔John Deere柴油机偏心轴代理商,阿坝Perkins帕金斯854E-E34TA约翰迪尔John Deere柴油机水温机油压力转速传感器哪家好,天水珀金斯2206S-E13约翰迪尔John Deere柴油机多小钱在什么地方买,天水Perkins帕金斯403D-11柴油机费用,因为美国工厂已经充分考虑到减轻保养次数,使驾驶员的劳动强度进一步降低,因此增加了空气外滤芯的滤纸的面积,使过滤效果更好,并通过反复的实验,所以说7820拖拉机的空气滤芯不用清扫。在有的农场,还是按照老的方法清扫空滤的话,则会把滤纸吹毛,反而会使脏的滤纸屑和杂质等进入到空气系统,造成污染,使约翰迪尔John Deere柴油机的寿命缩短。燃油滤芯不堵就不用更换这种做法是错误的,因为滤芯是始终浸泡在柴油中的,超过一定的时间浸泡的滤纸也会膨胀,掉毛,此时不仅起不到过滤的作用,还会使滤芯本身的问题造成燃油系统的故障,严重的还会导致喷油嘴的损坏。这是得不偿失的。例如:尖山农场的两台7820拖拉机的工作小时数分别为1200小时和1400小时,建设农场的的一台7820的工作小时为600多小时,一直没有更换滤芯,这是一种错误做法,如上述,这几台车,从表面上看是省了一些钱,如果总不换滤芯则会导致喷油嘴等的损坏。所以应当在500或一年应当更换掉滤芯,哪个先到哪个为准。

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