曲軸軸頸上有裂紋和劃痕的跡象是否有過熱或變色跡象怎么辦約翰迪爾John Deere柴油機
約翰迪爾John Deere柴油機連桿蓋并拆下曲軸
1.使用JDG820或JDE81-1飛輪車削工具旋轉曲軸,直到可以輕松拆卸連桿蓋。您將能夠在每個位置拆下桿蓋。
2.拆下所有連桿蓋(A)和軸承(B),然后拆下1號和7號主軸承蓋和軸承。請參閱第030組中的拆卸活塞和連桿組件。
拆卸約翰迪爾John Deere柴油機連桿蓋
注意:曲軸非常重。制定適當的處理程序以避免受傷。
注意:在曲軸兩端安裝一個螺釘,以幫助提升曲軸。
3.如圖所示,在約翰迪爾John Deere柴油機曲軸兩端各安裝一個帶帽螺釘,并將吊帶連接到曲軸上。使用適當的起吊設備,小心地將曲軸從缸體中抬起。
4.使用溶劑和壓縮的安全氣囊清潔曲軸,尤其是油道。
5.將約翰迪爾John Deere柴油機曲軸放在干凈的V形塊上。
6.使用以下方法之一從曲軸法蘭上拆下后耐磨套(如果之前未進行):
•如本組前面所述,使用JDG790耐磨套拔出器從曲軸上拆下耐磨套。將約翰迪爾John Deere柴油機曲軸連桿軸頸放置在V形塊中,以便在拆卸耐磨套時曲軸不會旋轉。
•使用球頭錘的球側并敲擊沿其寬度沿直線磨損套筒(使套筒變形和拉伸)。
•將耐磨套劃傷(但不要切割)成幾處用鈍鑿在外徑周圍。
檢查曲軸
注意:如果在拆卸過程中發(fā)現曲軸減振器損壞,則應
麥格納很困惑。這將驗證其是否有微觀裂紋或裂縫。請參閱本組中的檢查減振器。
1.徹底清潔曲軸。清除所有油道的阻塞物。
2.檢查曲軸軸頸上是否有負載應力、裂紋和劃痕的跡象。同時檢查每個軸頸是否有過熱或變色跡象。如果存在任何一種情況,更換曲軸,因為熱處理可能已損壞。
3.檢查(前)曲軸齒輪和(后)油泵驅動齒輪是否有裂紋、齒屑或過度磨損。根據需要更換齒輪。見替換曲軸齒輪和更換(曲軸)檢查約翰迪爾John Deere柴油機曲軸油泵驅動齒輪,本組后面。A桿軸頸孔和B軸頸圓角
4.檢查鍵槽是否有裂紋或磨損跡象。必要時更換曲軸。
5.仔細檢查約翰迪爾John Deere柴油機磨損套筒接觸面區(qū)域的曲軸后輪轂是否存在粗糙或有槽的情況。此處的任何缺陷都會導致機油泄漏??梢杂蒙安蓟蛏安记謇磔p微的隆起。
6.檢查每個軸頸是否有過度過熱或變色的跡象。如果存在任何一種情況,更換曲軸,因為熱處理可能已損壞。
7.仔細檢查曲軸連桿軸頸孔(A)和軸頸圓角(B)區(qū)域是否有裂紋。如果發(fā)現任何裂紋,請更換曲軸。
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拖拉機的空氣濾芯的清掃
大家可以看到,7820的空氣濾芯同8420,9000系列的是完全不一樣的,
從側面看,8420,9320,9520等拖拉機的空氣濾芯是環(huán)形的,而7820的是蜂巢狀的,請問你用什么方法進行清掃呢?
誠然,你從何處也找不到清掃的地方,有的人會問:那如何清掃呢?
給你的答案是:不用清掃。株洲CATC1.1約翰迪爾John Deere柴油機原廠配件歡迎來電,福建Perkins帕金斯1206E-E66TA約翰迪爾John Deere柴油機連桿襯套一臺多少錢,宿遷Perkins帕金斯1103D-33TA約翰迪爾John Deere柴油機曲軸箱配件商家,佳木斯Perkins帕金斯1506A-E88TAG3約翰迪爾John Deere柴油機曲軸中心,錦州Perkins帕金斯403F-07約翰迪爾John Deere柴油機噴油器歡迎來電,滄州Perkins帕金斯403D-15T約翰迪爾John Deere柴油機氣門室蓋罩哪家好,齊齊哈爾Perkins帕金斯4016TAG2A約翰迪爾John Deere柴油機水溫機油壓力轉速傳感器聯系,長治CATC6.6柴油機原廠配件一臺多少錢,鄂爾多斯Perkins帕金斯403D-15約翰迪爾John Deere柴油機連桿襯套網站,拉薩Perkins帕金斯1204E-E44TTAG2約翰迪爾John Deere柴油機配件聯系電話聯系,三沙Perkins帕金斯854E-E34TA約翰迪爾John Deere柴油機偏心軸代理商,阿壩Perkins帕金斯854E-E34TA約翰迪爾John Deere柴油機水溫機油壓力轉速傳感器哪家好,天水珀金斯2206S-E13約翰迪爾John Deere柴油機多小錢在什么地方買,天水Perkins帕金斯403D-11柴油機費用,因為美國工廠已經充分考慮到減輕保養(yǎng)次數,使駕駛員的勞動強度進一步降低,因此增加了空氣外濾芯的濾紙的面積,使過濾效果更好,并通過反復的實驗,所以說7820拖拉機的空氣濾芯不用清掃。在有的農場,還是按照老的方法清掃空濾的話,則會把濾紙吹毛,反而會使臟的濾紙屑和雜質等進入到空氣系統(tǒng),造成污染,使約翰迪爾John Deere柴油機的壽命縮短。燃油濾芯不堵就不用更換這種做法是錯誤的,因為濾芯是始終浸泡在柴油中的,超過一定的時間浸泡的濾紙也會膨脹,掉毛,此時不僅起不到過濾的作用,還會使濾芯本身的問題造成燃油系統(tǒng)的故障,嚴重的還會導致噴油嘴的損壞。這是得不償失的。例如:尖山農場的兩臺7820拖拉機的工作小時數分別為1200小時和1400小時,建設農場的的一臺7820的工作小時為600多小時,一直沒有更換濾芯,這是一種錯誤做法,如上述,這幾臺車,從表面上看是省了一些錢,如果總不換濾芯則會導致噴油嘴等的損壞。所以應當在500或一年應當更換掉濾芯,哪個先到哪個為準。