約翰迪爾John Deere拖拉機(jī)6081HRW活塞和連桿拆卸步驟襯套、活塞和連桿磨損劃傷的原因
約翰迪爾John Deere柴油機(jī)活塞磨損或劃傷:
•定期保養(yǎng)不當(dāng)。
•惡劣的操作條件。
•過熱。•冷卻液泄漏到曲軸箱中。
•加油過量。•缸套錐度過大。
•潤滑不足。
•冷卻不足。雜色、灰色或點(diǎn)狀壓縮環(huán):
•約翰迪爾John Deere柴油機(jī)活塞與缸套間隙不當(dāng)。
•冷卻液泄漏到曲軸箱中。•內(nèi)部冷卻液泄漏。
•約翰迪爾John Deere柴油機(jī)連桿未對準(zhǔn)或彎曲。
•約翰迪爾John Deere柴油機(jī)活塞安裝不當(dāng)。暗緞面和精細(xì)的垂直劃痕
•低油位。環(huán):
•操作不當(dāng)。
•約翰迪爾John Deere柴油機(jī)連桿軸承間隙不正確。•進(jìn)氣系統(tǒng)中的污垢和磨料。
•環(huán)槽中的積碳。
•強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)磨合不當(dāng)?;钊N和卡環(huán)故障:
•約翰迪爾John Deere柴油機(jī)活塞磨損。
•受油污染。•連桿未對準(zhǔn)。
•約翰迪爾John Deere柴油機(jī)氣缸套變形。•曲軸端隙過大。
•活塞冷卻孔堵塞。•卡環(huán)不正確。
•通過進(jìn)氣口吸入灰塵。
連桿斷裂:壓縮環(huán)磨損或斷裂:
•約翰迪爾John Deere柴油機(jī)活塞與缸套間隙不足。
•潤滑不足。•連桿軸承磨損。
•冷卻不足。•氣缸管路變形。
•約翰迪爾John Deere柴油機(jī)環(huán)安裝不當(dāng)。•活塞銷故障。
•時機(jī)不當(dāng)。
•燃燒室內(nèi)的磨料。氣缸套磨損和變形:機(jī)油控制環(huán)堵塞:
•壓縮環(huán)安裝不正確。
•潤滑不足。
•不適當(dāng)?shù)挠汀?#8226;襯里周圍冷卻不均勻。
•過度竄氣。•活塞與缸套間隙不足。
•受油污染。•缸套孔損壞。
•不適當(dāng)?shù)亩ㄆ诜?wù)。
•低工作溫度。翹曲氣缸體:
卡環(huán):
•冷卻不足。
•油分類不當(dāng)。
約翰迪爾John Deere柴油機(jī)連桿一般信息
早期的強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)在連桿和蓋(A)之間有傳統(tǒng)的榫槽。后來的強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)有精密接頭 桿和蓋(B)。
創(chuàng)建精密關(guān)節(jié)的步驟, 用激光束在連桿上刻槽。然后,為桿孔中的精密心軸提供動力,以在接頭(C)處將蓋與桿分離。
兩種類型的桿都提供了牢固的連接。拆卸和安裝類似,但存在差異,包括帶帽螺釘?shù)牟煌ぞ匾?guī)格。請參閱“檢查桿和蓋”和“安裝活塞”以及該組中的連桿。
重要事項(xiàng):更換相同類型的桿。不要將榫舌和凹槽與精密接頭混合 同一臺強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)中的連桿。有關(guān)建議,請參見零件目錄。
A型榫槽桿(早期強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī))B型精密接頭 連桿(后來的強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī))C型精密接頭 細(xì)節(jié)
拆下活塞和連桿組件
必須從8100-8400和8110-8410拖拉機(jī)上拆下6081HRW強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī),以維修活塞和連桿。有關(guān)強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)拆卸步驟,請參閱機(jī)器技術(shù)手冊TM1575(維修)。(對于8000噸履帶拖拉機(jī),請參閱TM1621。)
重要事項(xiàng):更換相同類型的桿。不要將榫舌和凹槽與精密接頭混合 同一臺強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)中的連桿。有關(guān)建議,請參見零件目錄。
警告:在強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)冷卻液冷卻到工作溫度以下之前,不要排放強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)冷卻液。然后緩慢松開冷卻液泵蓋排放閥(A)和阻塞排放閥(B),以釋放任何壓力。
排放冷卻液和強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)機(jī)油。
重要事項(xiàng):必須打開兩個排放閥以完全排放強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)缸體。
1.排空所有強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)冷卻液和強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)機(jī)油。
注意:如果要完全拆卸強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī),請參見第010組中的強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)拆卸順序。
2.拆下氣缸蓋。請參見組020中的拆卸氣缸蓋序列號(-199999),或參見組021中的拆卸缸蓋序列號(200000-)。
3.拆下油底殼和油泵。請參見組060中的拆卸強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)機(jī)油泵。
冷卻液泵排放閥
氣缸體排放閥
A-冷卻液泵蓋排水閥B-隔斷排水閥
重要事項(xiàng):除非襯套用螺栓固定,否則不要在拆下氣缸蓋的情況下旋轉(zhuǎn)曲軸。拆下活塞前,用螺栓固定襯套。
帶帽螺釘和墊圈必須擰緊至以下規(guī)格:
在測量襯墊突出物(塊上方的高度)時實(shí)現(xiàn)精確讀數(shù)。參見測量氣缸套突出量(氣缸體上方的高度),
在這個組的后面。
4.使用9/16-18帶帽螺釘,約51 mm(2.0英寸)長和5/8英寸。一、 D.1-3/4英寸。O、 D.x 3.18 mm(1/8 in.)厚墊圈,用于將氣缸套固定在
七個位置如圖所示。擰緊帶帽螺釘以固定氣缸套
規(guī)格。
規(guī)格
氣缸套帶帽螺釘(用于檢查支架)-扭矩…68牛•米(50磅-英尺)
下一頁繼續(xù)RG,RG347101113-19-08JUN99-2/5
重要事項(xiàng):不要使用氣動扳手?jǐn)Q緊連桿帶帽螺釘。使用氣動扳手可能會導(dǎo)致螺紋損壞。
保持軸承鑲塊帶有各自的桿和蓋。標(biāo)記桿、活塞和蓋,以確保在拆卸時的相同位置正確組裝。
7.拆下帶軸承(B)的桿帽螺釘和桿帽(A)。
A- 桿蓋B-軸承
曲軸顯示為已拆下,但活塞和連桿組件可以在安裝曲軸的情況下拆下。
重要事項(xiàng):拆卸活塞和連桿組件時,小心不要讓連桿劃傷曲軸軸承表面。
如果要重復(fù)使用襯套,在拆卸活塞和連桿組件時,要格外小心,不要讓連桿碰到襯套孔。
拆卸活塞
活塞和襯套選擇性地安裝到A型活塞上
保持活塞與襯套之間的間隙。
始終將匹配的活塞和缸套作為一組放在一起,每組必須安裝在拆下的同一氣缸中。
8.從底部通過缸體頂部輕輕敲擊活塞(A)。一旦活塞環(huán)清除缸套孔,抓住活塞以防止活塞掉落。
Preliminary Liner, Piston, and Rod Checks
Scuffed or Scored Pistons: • Improper periodic service.
• Poor operating conditions.
• Overheating. • Coolant leakage into crankcase.
• Overfueling. • Excessive cylinder liner taper.
• Insufficient lubrication.
• Insufficient cooling. Mottled, Grayish or Pitted Compression Rings:
• Improper piston-to-liner clearance.
• Coolant leakage into crankcase. • Internal coolant leaks.
• Misaligned or bent connecting rod.
• Improperly installed piston. Dull Satin Finish and Fine Vertical Scratches on
• Low oil level. Rings:
• Improper operation.
• Incorrect connecting rod bearing clearance. • Dirt and abrasives in air intake system.
• Carbon build-up in ring groove.
• Improper engine break-in. Piston Pin and Snap Ring Failure:
• Worn piston.
• Contaminated oil. • Misaligned connecting rod.
• Distorted cylinder liner. • Excessive crankshaft end play.
• Plugged piston cooling orifice. • Incorrect snap rings.
• Ingestion of dust through air intake.
Broken Connecting Rod:
Worn or Broken Compression Rings:
• Inadequate piston-to-liner clearance.
• Insufficient lubrication. • Worn connecting rod bearing.
• Insufficient cooling. • Distorted cylinder line.
• Improper ring installation. • Piston pin failure.
• Improper timing.
• Abrasives in combustion chamber. Cylinder Liner Wear and Distortion:
Clogged Oil Control Ring: • Incorrectly installed compression rings.
• Insufficient lubrication.
• Improper oil. • Uneven cooling around liner.
• Excessive blow-by. • Inadequate piston-to-liner clearance.
• Contaminated oil. • Liner bore damage.
• Improper periodic service.
• Low operating temperature. Warped Cylinder Block:
Stuck Rings: • Insufficient cooling.
• Improper oil classification.
Connecting Rods—General Information
Earlier engines have the traditional tongue-and-groove between the connecting rod and cap (A). Later engines have the Precision Joint rod and cap (B).
To create the Precision Joint, the connecting rod is notched with a laser beam. Then a precision mandrel in the rod bore is powered to separate the cap from the rod at the joints (C).
Both types of rods provide a strong joint. Removal and installation is similar, with differences noted, including different torque specifications for cap screws. See INSPECT ROD AND CAP and see INSTALL PISTON
AND CONNECTING ROD later in this Group.
IMPORTANT: Replace rods with the same type. Do Not mix tongue-and-groove with Precision Joint rods in the same engine. See parts catalog for recommendations.
A—Tongue-and-Groove Rod (Early Engines) B—Precision Joint Rod (Later Engines) C—Precision Joint Details
Remove Pistons and Connecting Rod Assemblies
6081HRW Engines must be removed from 8100-8400 and 8110-8410 Tractors to service the pistons and connecting rods. Refer to machine technical manual TM1575 (Repair) for engine removal procedure. (For 8000T Tracks Tractors, refer to TM1621.)
IMPORTANT: Replace rods with the same type. Do Not mix tongue-and-groove with Precision Joint rods in the same engine. See parts catalog for recommendations.
CAUTION: Do not drain engine coolant until it cools below operating temperature. Then slowly loosen coolant pump cover drain valve (A) and block drain valve (B) to relieve any pressure.
Drain coolant and engine oil.
IMPORTANT: Both drain valves must be opened to completely drain engine block.
1. Drain all engine coolant and engine oil.
NOTE: If engine is to be completely disassembled, see ENGINE DISASSEMBLY SEQUENCE in Group 010.
2. Remove cylinder head. See REMOVE CYLINDER HEAD SERIAL NUMBER ( —199,999) in Group 020, or see REMOVE CYLINDER HEAD SERIAL NUMBER (200,000— ) in Group 021.
3. Remove oil pan and oil pump. See REMOVE ENGINE OIL PUMP in Group 060.
Coolant Pump Drain Valve
Cylinder Block Drain Valve
A—Coolant Pump Cover Drain Valve B—Block Drain Valve
IMPORTANT: Do not rotate crankshaft with cylinder head removed unless liners are bolted down. Bolt liners down before removing piston.
Cap screws and washers must be tightened to the following specifications
to achieve an accurate reading when measuring liner standout (height above block). See MEASURE CYLINDER LINER STANDOUT (HEIGHT ABOVE BLOCK),
later in this group.
4. Use 9/16-18 cap screws, approximately 51 mm
(2.0 in.) long and 5/8 in. I.D. 1-3/4 in. O.D. x 3.18 mm (1/8 in.) thick washers to bolt down cylinder liners in
the seven locations as shown. Tighten cap screws to Bolting Down Cylinder Liners
specifications.
Specification
Cylinder Liner Cap Screws (For
Checking Standout)—Torque ... 68 N•m (50 lb-ft)
Continued on next page RG,RG34710,1113 –19–08JUN99–2/5
IMPORTANT: DO NOT use pneumatic wrenches to tighten rod cap screws. Using pneumatic wrenches may cause thread damage.
Keep bearing inserts with their respective rods and caps. Mark rods, pistons, and caps to insure correct assembly in same location as removed.
7. Remove rod cap screws and rod caps (A) with bearings (B).
A—Rod Caps B—Bearings
Crankshaft is shown removed, but piston and rod assembly can be removed with crankshaft installed.
IMPORTANT: Be careful not to let rod nick crankshaft bearing surface as piston and rod assembly is removed.
If liners are to be reused, be extremely careful not to let connecting rod hit liner bore when removing piston and rod assembly.
Removing Pistons
Piston and liners are selectively fitted to A—Piston
maintain piston-to-liners clearance.
Always keep matched pistons and liners together as a set and each set MUST BE installed in the same cylinder as removed.
8. Gently tap piston (A) through top of cylinder block from the bottom. Once piston rings have cleared cylinder liner bore, hold on to piston to prevent piston from dropping.
約翰迪爾5000系列拖拉機(jī)在中國的第一位用戶鄭寶森已經(jīng)是約翰迪爾的老用戶了,他家承包了1000畝土地,種植玉米和葵花,同時還在周圍的農(nóng)場作業(yè)。他家的拖拉機(jī)每年使用時間是大多數(shù)地區(qū)的3倍以上,每臺拖拉機(jī)的年純收入達(dá)8~10萬元,從事農(nóng)機(jī)服務(wù)12年的鄭寶森已經(jīng)使用過6臺迪爾拖拉機(jī),說起他新購買的JD5-854,鄭寶森的喜悅心情溢于言表:“我第一眼看到這車,真是喜歡,底盤高了,前輪寬了。干起活來強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)特別有勁,擋位的設(shè)置非常合理。”佛山Perkins2806S-E15強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)多小錢電話,大同Perkins帕金斯1103D-33TA強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)高壓油泵、油泵組件一臺多少錢,撫順Perkins帕金斯4012-46TAG3A強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)上下大修包一般多少錢,泉州Perkins帕金斯2206D-E13TAG3強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)曲軸瓦、連桿瓦、大小瓦企業(yè),巴彥淖爾Perkins帕金斯403D-15T強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)啟動馬達(dá)費(fèi)用報價單,湖南Perkins帕金斯1106D-E70TAG3強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)高壓油泵、油泵組件費(fèi)用報價單,盤錦Perkins帕金斯4012-46TAG3A強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)皮帶哪里有,攀枝花卡特C18強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)原廠配件費(fèi)用,長治Perkins帕金斯1104C-TG3強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)缸體多少錢,錫林郭勒Perkins帕金斯4006-23TAG3A強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動機(jī)油水分離器大概的價錢,很多鄉(xiāng)親都來觀摩鄭寶森的新車,他們擔(dān)心JD5-854的后橋是否單薄了一些,鄭寶森向他們解釋說:“后橋是進(jìn)口的,體積不需要那么大,車的性能已經(jīng)得到多年的成功驗(yàn)證,而且我開車干活的時候,后橋一點(diǎn)異常的響聲也沒有。”
內(nèi)蒙赤峰市翁牛特旗大興農(nóng)場的何寶勝也是提前交定金的用戶之一,JD5-854是他購置的第二臺拖拉機(jī),他的購車?yán)砟钍牵阂I就買個質(zhì)量過關(guān)、經(jīng)久耐用的拖拉機(jī)。他認(rèn)為約翰迪爾5000系列拖拉機(jī)的后橋和變速箱的質(zhì)量很過關(guān),駕駛也很舒服的。用他的一句話形容,那就是“值了”。約翰迪爾5000系列拖拉機(jī)在中國市場熱銷的原因,首先是馬力段設(shè)置合理,該系列目前在中國市場覆蓋的75、80、85馬力是拖拉機(jī)市場的主力機(jī)型,同時價位合理,性價比優(yōu)勢非常明顯。