技術中心

當前位置:首頁 -> 技術中心 -> 技術中心內頁

凸輪軸齒輪至噴油泵驅動齒輪齒隙最小為多小約翰迪爾John Deere柴油機

發布日期:2022-8-30 14:43:26

凸輪軸齒輪至噴油泵驅動齒輪齒隙最小為多小約翰迪爾John Deere柴油機

注意:拆卸約翰迪爾John Deere柴油機凸輪軸時,不必從約翰迪爾John Deere柴油機上拆下氣缸蓋。如果推桿彎曲或出現過度磨損,可能需要拆下氣缸蓋,以檢查氣缸體、氣缸蓋、凸輪凸角和凸輪從動件。

1.排空約翰迪爾John Deere柴油機機油和冷卻液(如果之前未進行)。如本組前面所述,拆下正時齒輪蓋。請參閱本組中的拆卸減震器和正時齒輪蓋。

2.使用JDE81-1JDG820飛輪旋轉工具旋轉約翰迪爾John Deere柴油機飛輪,并使用JDE814正時銷將約翰迪爾John Deere柴油機鎖定在1號氣缸的“TDC壓縮”沖程。凸輪軸齒輪和曲軸齒輪上的正時標記(A)應對齊。

如果正時標記未對齊,拆下正時銷并繼續旋轉約翰迪爾John Deere柴油機,直到標記對齊。正時銷應進入飛輪的孔中。約翰迪爾John Deere柴油機將鎖定在1號“上止點壓縮”沖程。

3.拆下搖臂總成和推桿。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。

4.在約翰迪爾John Deere柴油機處于翻轉架上的情況下拆卸凸輪軸時,將約翰迪爾John Deere柴油機翻轉至從動件從凸輪軸凸角(油底殼朝上)脫落的位置,或保持凸輪從動件拆卸凸輪軸

注意:拆卸凸輪軸時,不必從約翰迪爾John Deere柴油機上拆下氣缸蓋。如果推桿彎曲或出現過度磨損,可能需要拆下氣缸蓋,以檢查氣缸體、氣缸蓋、凸輪凸角和凸輪從動件。

1.排空約翰迪爾John Deere柴油機機油和冷卻液(如果之前未進行)。如本組前面所述,拆下正時齒輪蓋。請參閱本組中的拆卸減震器和正時齒輪蓋。

2.使用JDE81-1JDG820飛輪旋轉工具旋轉約翰迪爾John Deere柴油機飛輪,并使用JDE814正時銷將約翰迪爾John Deere柴油機鎖定在1號氣缸的“TDC壓縮”沖程。凸輪軸齒輪和曲軸齒輪上的正時標記(A)應對齊。

如果正時標記未對齊,拆下正時銷并繼續旋轉約翰迪爾John Deere柴油機,直到標記對齊。正時銷應進入飛輪的孔中。約翰迪爾John Deere柴油機將鎖定在1號“上止點壓縮”沖程。

3.拆下搖臂總成和推桿。請參見組020中的拆卸氣缸蓋,或參見組021中的拆卸缸蓋。

4.在約翰迪爾John Deere柴油機位于翻車臺上的情況下拆卸凸輪軸時,將約翰迪爾John Deere柴油機滾動至從動件從凸輪軸凸角(油底殼側朝上)脫落的位置,或使用D15001NU磁性固定組件將凸輪從動件從凸角上固定。

正時標記、凸輪軸和曲軸齒輪

A定時標記

使用D15001NU磁性固定裝置遠離葉片。

正時標記、凸輪軸和曲軸齒輪

A定時標記

5.檢查凸輪軸齒輪(A)和噴油泵驅動齒輪(B)的輪齒是否磨損或損壞。齒輪應具有如下最小齒隙:

規格

凸輪軸齒輪至噴油泵驅動齒輪齒隙最小為0.051毫米(0.0020英寸)

注意:拆卸凸輪軸時,曲軸和凸輪軸齒輪上的正時標記應對齊,1號氣缸應鎖定在“TDC壓縮”沖程。

A凸輪軸齒輪B噴油泵驅動齒輪

拆下凸輪軸齒輪

重要事項:將約翰迪爾John Deere柴油機凸輪軸前端推出齒輪時,防止凸輪軸撞擊地面。如果讓凸輪軸掉落到地板上,可能會損壞凸輪軸。

注意:凸輪軸齒輪壓在凸輪軸上。

從凸輪軸上拆下齒輪需要大約10噸的壓力。

1.用壓力機支撐外凸輪軸齒輪(A)。

2.從凸輪軸上拆下外齒輪。

3.用壓力機支撐內凸輪軸齒輪(B)。

4.從凸輪軸上拆下內齒輪。

5.在溶劑中清潔凸輪軸和齒輪。用壓縮空氣干燥。

拆卸外凸輪軸齒輪

A-外凸輪軸齒輪B-內凸輪軸齒輪測量止推墊圈厚度

1.拆下約翰迪爾John Deere柴油機凸輪軸后,分別檢查兩個止推墊圈的厚度是否正確。

規格

止推墊圈厚度2.24-2.34 mm0.088-0.092 in.

2.更換磨損或損壞的墊圈。

檢查和測量凸輪軸從動件

1.檢查約翰迪爾John Deere柴油機凸輪軸從動件有無不均勻磨損或損壞。同時檢查相應的凸輪軸凸輪有無磨損或損壞。必要時更換。

2.測量約翰迪爾John Deere柴油機缸體中的從動件外徑和從動件孔內徑。

規格

約翰迪爾John Deere柴油機凸輪軸從動件外徑……17.33-17.35 mm0.682-0.683英寸)

檢查凸輪軸從動件時的凸輪軸從動孔區塊ID……17.384-17.440 mm0.6845-0.6865英寸)

更換不符合規格的凸輪從動件。如果任何一個從動件孔不符合規格,則更換缸體。

目視檢查凸輪軸

1.在溶劑中清潔凸輪軸。用壓縮空氣干燥。

2.檢查所有凸輪軸凸輪(A)和軸頸(B)是否磨損或損壞。必要時更換凸輪軸。新凸輪軸從動件可與舊凸輪軸一起使用(如果凸輪軸可用)。不要將舊凸輪軸從動件與新凸輪軸一起重復使用。

注:可能會發現非常輕微的刻痕,但如果氣門升程在規范范圍內,則可以接受。點蝕或磨損要求更換。(見C

1.將凸輪軸支撐在液壓機的第一軸承軸頸下方。

2.安裝半月鍵(A)。用LOCTITE潤滑凸輪軸前端 51048鉬膏。

3.將內齒輪(B)設置在凸輪軸上,止推墊圈表面向內(朝向凸輪軸)。對齊半月鍵和鍵槽。

4.將齒輪安裝到凸輪軸前端。推上內齒輪,直到其緊靠凸輪軸軸承軸頸。

5.在凸輪軸上設置外齒輪,使正時標記朝上(遠離凸輪軸)。對齊外齒輪(D)的半圓鍵和鍵槽(C)。

6.將外齒輪推到凸輪軸前端,直到與內齒輪擰緊。

7.在中心支撐凸輪軸的每一端。使用千分表,將柱塞置于凸輪軸齒輪的推力面上。

8.檢查內外齒輪止推表面的跳動。

規格

凸輪軸齒輪推力面-最大跳動量……0.10毫米(0.004英寸)

安裝凸輪軸內齒輪

A-      半月鍵B-內齒輪C-鍵槽D-外齒輪

使用JDG602適配器套件維修凸輪軸襯套

1.檢查凸輪軸軸頸和襯套是否磨損或損壞。測量凸輪軸頸和襯套,以確定是否存在適當的油隙。必要時更換凸輪軸和/或襯套。

規格

凸輪軸襯套內徑…67.076-67.102 mm2.6408-2.6418英寸)區塊內鉆孔69.987-70.013毫米(2.7554-2.7564英寸)

凸輪軸孔跳動……0.038 mm0.0015 in.)最大凸輪軸軸頸外徑……66.987-67.013 mm2.6373-2.6383英寸)

凸輪軸襯套至軸頸油間隙……0.063-0.115 mm0.0025-0.0045英寸)拆卸凸輪軸襯套

注意:可以從約翰迪爾John Deere柴油機前部觸及前兩個襯套。必須拆下飛輪和后凸輪軸孔塞(G)才能接觸到其他兩個襯套。

2.使用JDG603襯套驅動器(E)和JDG604接收杯(D)以及JDE6凸輪軸襯套更換套件(AC)中所示的部件拆下凸輪軸襯套(F)。

3.擰緊襯套螺釘端部的螺母,直到襯套從凸輪軸襯套孔中拉出。檢查并測量缸體(B)中的凸輪軸襯套孔。對于要更換的其余襯套,請遵循相同的步驟。

凸輪軸后孔塞

A-襯套螺釘(JDE6-1B-氣缸體腹板C-鎖襯套(編號25916D-接收器杯(JDG604E-襯套驅動器(JDG603F-凸輪軸襯套G-凸輪軸孔塞使用JDG606適配器套件維修凸輪軸襯套

1.檢查凸輪軸軸頸和襯套是否磨損或損壞。測量凸輪軸頸和襯套,以確定是否存在適當的油隙。必要時更換凸輪軸和/或襯套。

規格凸輪軸襯套內徑…67.076-67.102 mm2.6408-2.6418英寸)塊內鉆孔。。。。69.987-70.013毫米(2.7554-2.7564英寸)

拆卸凸輪軸襯套

凸輪軸孔跳動…….0.038 mm0.0015 in.)最大凸輪軸軸頸外徑…….66.987-67.013 mm2.6373-2.6383英寸)

凸輪軸襯套至軸頸油間隙…….0.063-0.115 mm0.0025-0.0045英寸)

注意:前兩個襯套可從約翰迪爾John Deere柴油機前部觸及。必須拆下飛輪和后凸輪軸孔塞(G)才能接觸到其他兩個襯套。

在安裝到缸體腹板(C)中之前,用清潔的約翰迪爾John Deere柴油機機油潤滑JDG608襯套導向器上的O形圈。

2.使用JDG607襯套驅動器(A)和JDG408滑錘適配器(D)(來自JDG405凸輪軸襯套維修套件)拆下凸輪軸襯套(B)。還應使用JDG608襯套導向器(E)和D01299AA滑錘(F)。

注意:缸體前后的端部襯套可以僅用JDG607襯套驅動器和D01299AA滑錘拆下。

3.拆卸襯套時,檢查并測量缸體中的每個凸輪軸襯套孔。

凸輪軸后孔塞

A-襯套驅動器(JDG607B-凸輪軸襯套C-缸體腹板

D-滑錘適配器(JDG408)和E-套管導向器(JDG608

F-滑錘(D01299AAG-凸輪軸孔塞

重要事項:安裝后,襯套和缸體中的油孔必須對齊。襯套中的細長孔必須朝向頂部。安裝后,使用帶加長件的小鏡子,以確保油孔正確對齊。

4.將新的凸輪軸襯套(B)滑到JDG603襯套驅動器(a)上。將JDG608襯套導向器安裝在氣缸體腹板(C)的外側,用襯套驅動器組裝D01299AA滑錘(E)和JDG408滑錘適配器(D),如圖所示。

5.確保襯套在孔中開始呈方形,油孔與缸體中的孔對齊。用滑錘將襯套拉入孔中,直到正確定位。

6.使用帶加長件的小鏡子檢查襯套與缸體油孔的對齊情況。

7.申請PERMATEX 航空(3A型墊片)至新凸輪軸孔鋼蓋塞,并在孔中安裝塞。塞子邊緣必須位于孔邊緣下方。

安裝凸輪軸

重要事項:在安裝凸輪軸之前,將約翰迪爾John Deere柴油機設置在1號活塞壓縮沖程的上止點,以便凸輪軸和曲軸齒輪上的正時標記對齊。

1.如果將凸輪軸從動件與約翰迪爾John Deere柴油機一起在翻車臺上拆下,則重新安裝從動件,但不要堵塞凸輪軸孔。將約翰迪爾John Deere柴油機滾動至從動件從凸輪軸孔脫落的角度。

注意:如果使用D15001NU磁性固定工具組,將凸輪軸從動件從凸輪軸孔中固定,直到安裝凸輪軸。

2.TY6333TY6347高溫潤滑脂潤滑止推墊圈(A),并安裝在內齒輪后面的凸輪軸上。

3.TY6333TY6347高溫潤滑脂潤滑凸輪軸凸輪,并用清潔的約翰迪爾John Deere柴油機機油潤滑軸承軸頸。

4.小心地將凸輪軸安裝在氣缸體中,以使凸輪軸凸輪不會拖入孔中。在安裝過程中旋轉凸輪軸,以避免任何孔堵塞。

凸輪軸止推墊圈

A型止推墊圈

Remove Camshaft

NOTE: It is not necessary to remove cylinder head from engine for camshaft removal. If push rods are bent or show excessive scuffing, it may be necessary to remove cylinder head for inspection of block, head, cam lobes and cam followers.

1.      Drain engine oil and coolant, if not previously done. Remove timing gear cover as detailed earlier in this group. See REMOVE VIBRATION DAMPER AND TIMING GEAR COVER in this group.

2.      Rotate engine flywheel with JDE81-1 or JDG820 Flywheel Rotation Tool and lock engine at No. 1 cylinder’s “TDC-Compression” stroke with JDE81-4 Timing Pin. Timing marks (A) on camshaft gear and crankshaft gear should be aligned.

If timing marks are not aligned, remove timing pin and continue to rotate engine until marks align. Timing pin should enter hole in flywheel. Engine will be locked at No. 1 “TDC-Compression” stroke.

3.      Remove rocker arm assembly and push rods. See REMOVE CYLINDER HEAD SERIAL NUMBER ( — 199,999) in Group 020, or see REMOVE CYLINDER HEAD SERIAL NUMBER (200,000— ) in Group 021.

4.      When removing camshaft with engine on rollover stand, roll engine to a position where followers fall away from camshaft lobes (oil pan side up) or hold cam followers Remove Camshaft

NOTE: It is not necessary to remove cylinder head from engine for camshaft removal. If push rods are bent or show excessive scuffing, it may be necessary to remove cylinder head for inspection of block, head, cam lobes and cam followers.

1.      Drain engine oil and coolant, if not previously done. Remove timing gear cover as detailed earlier in this group. See REMOVE VIBRATION DAMPER AND TIMING GEAR COVER in this group.

2.      Rotate engine flywheel with JDE81-1 or JDG820 Flywheel Rotation Tool and lock engine at No. 1 cylinder’s “TDC-Compression” stroke with JDE81-4 Timing Pin. Timing marks (A) on camshaft gear and crankshaft gear should be aligned.

If timing marks are not aligned, remove timing pin and continue to rotate engine until marks align. Timing pin should enter hole in flywheel. Engine will be locked at No. 1 “TDC-Compression” stroke.

3.      Remove rocker arm assembly and push rods. See REMOVE CYLINDER HEAD SERIAL NUMBER ( — 199,999) in Group 020, or see REMOVE CYLINDER HEAD SERIAL NUMBER (200,000— ) in Group 021.

4.      When removing camshaft with engine on rollover stand, roll engine to a position where followers fall away from camshaft lobes (oil pan side up) or hold cam followers away from lobes with D15001NU Magnetic Holding Set.

Timing Marks—Camshaft and Crankshaft Gears

A—Timing Marks

away from lobes with D15001NU Magnetic Holding Set.

Timing Marks—Camshaft and Crankshaft Gears

A—Timing Marks

5. Examine both camshaft gears (A) and injection pump drive gear (B) for worn or damaged gear teeth. Gears should have a minimum backlash as follows:

Specification

Camshaft Gear-to-Injection Pump

Drive Gear Backlash—Backlash ............. 0.051 mm (0.0020 in.) minimum

NOTE: Timing marks on crankshaft and camshaft gear should be aligned and No. 1 cylinder locked at “TDC Compression” stroke when removing camshaft.

A—Camshaft Gear B—Injection Pump Drive Gear

Remove Camshaft Gears

IMPORTANT: Prevent camshaft from striking floor when pushing camshaft nose out of gear. Camshaft may be damaged if it is allowed to fall to the floor.

NOTE:  Camshaft gears are pressed onto the camshaft.

Removal of gears from camshaft will require approximately a 10-ton press.

1.      Support outer camshaft gear (A) in a press.

2.      Remove outer gear from camshaft.

3.      Support inner camshaft gear (B) in a press.

4.      Remove inner gear from camshaft.

5.      Clean camshaft and gears in solvent. Dry with compressed air.

Removing Outer Camshaft Gear

A—Outer Camshaft Gear B—Inner Camshaft Gear

Measure Thrust Washer Thickness

1.      After removal of camshaft, check the two thrust washers individually for proper thickness.

Specification

Thrust Washer—Thickness .................  2.24—2.34 mm (0.088—0.092 in.)

2.      Replace washers if worn or damaged.

Inspect and Measure Camshaft Followers

1.      Inspect camshaft followers for uneven wear or damage. Also inspect corresponding camshaft lobe for wear or damage. Replace as necessary.

2.      Measure follower O.D. and follower bore I.D. in cylinder block.

Specification

Camshaft Follower—OD......  17.33—17.35 mm

(0.682—0.683 in.)

Camshaft Follower Bore in      Inspecting Camshaft Followers

Block—ID......  17.384—17.440 mm

(0.6845—0.6865 in.)

Replace cam followers that are not within specification. Replace cylinder block if any one follower bore is not within specification.

Visually Inspect Camshaft

1.  Clean camshaft in solvent. Dry with compressed air.

2. Inspect all camshaft lobes (A) and journals (B) for wear or damage. Replace camshaft as necessary. New camshaft followers can be used with old camshaft (if camshaft is serviceable). DO NOT reuse old camshaft followers with a new camshaft.

NOTE: Very light score marks may be found but are acceptable if valve lift is within specification. Pitting or galling dictates replacement. (See CHECK VALVE LIFT SERIAL NUMBER ( —

199,999) in Group 020 or see CHECK VALVE LIFT SERIAL NUMBER (200,000— ) in Group 021.)

Measure Camshaft Journal O.D. and Bushing I.D.

1.      Measure each camshaft journal O.D. If camshaft journal O.D. is not within specification, install a new camshaft.

2.      Measure each camshaft bushing I.D. when installed in cylinder block.

Compare measurements with specs given below. Replace camshaft and bushings as needed.

Measuring Camshaft Journals

Specification

Camshaft Journal—OD ....  66.987—67.013 mm

(2.6373—2.6383 in.) new Camshaft Bushing—I.D. .......  67.076—67.102 mm

(2.6408—2.6418 in.) new

Measure Camshaft Lobe Lift

Measure each camshaft lobe at its highest point and at its narrowest point. Subtract narrowest dimension from highest dimension to find camshaft lobe lift.

If camshaft lobe lift is not within the wear specification on any one lobe, install a new camshaft.

Specification

Intake Camshaft Lobe—Lift................. 7.69—7.79 mm (0.303—0.307 in.) Wear Limit ....  7.19 mm (0.283 in.)

Exhaust Camshaft Lobe—Lift.............. 8.25—8.35 mm (0.325—0.329 in.) Wear Limit ......  7.75 mm (0.305 in.)

Install Camshaft Gears

1.      Support camshaft under first bearing journal in a hydraulic press.

2.      Install Woodruff key (A). Lubricate camshaft nose with LOCTITE 51048 Moly Paste.

3.      Set inner gear (B) on camshaft with thrust washer surface to the inside (toward the camshaft). Align Woodruff key and keyway.

4.      Install gear onto nose of camshaft. Push inner gear on until tight against the camshaft bearing journal.

5.      Set outer gear on camshaft with timing mark upward (away from the camshaft). Align Woodruff key and keyway (C) of outer gear (D).

6.      Push outer gear onto camshaft nose until tight against inner gear.

7.      Support each end of the camshaft on centers. Use a dial indicator with plunger resting on the thrust surface of the camshaft gears.

8.      Check the runout of the inner and outer gear thrust surfaces.

Specification

Camshaft Gear Thrust Surfaces—

Runout ....... 0.10 mm (0.004 in.) maximum

Installing Camshaft Inner Gear

Installing Camshaft Outer Gear

A—  Woodruff Key B—Inner Gear C—Keyway D—Outer Gear

Service Camshaft Bushings Using JDG602 Adapter Set

1.       Inspect camshaft journals and bushings for wear or damage. Measure cam journals and bushings to determine if proper oil clearance exists. Replace camshaft and/or bushings as necessary.

Specification

Camshaft Bushing—ID .....  67.076—67.102 mm

(2.6408—2.6418 in.)

Bore in Block ......

69.987—70.013 mm

(2.7554—2.7564 in.)

Camshaft Bore—Runout ...... 0.038 mm (0.0015 in.) maximum Camshaft Journal—OD ......  66.987—67.013 mm

(2.6373—2.6383 in.)

Camshaft Bushing-to-Journal—Oil

Clearance .....  0.063—0.115 mm

(0.0025—0.0045 in.)

Removing Camshaft Bushings

NOTE: The front two bushings can be reached from the front of the engine. The flywheel and rear  camshaft bore plug (G) must be removed to reach the other two bushings.

2.       Remove camshaft bushings (F) using JDG603 Bushing Driver (E) and JDG604 Receiver Cup (D) along with  the components shown from JDE6 Camshaft Bushing Replacement Set (A and C).

3.       Tighten nut on end of bushing screw until bushing is pulled out of camshaft bushing bore. Inspect and measure camshaft bushing bore in block (B). Follow same procedure for remaining bushings to be replaced.

Camshaft Rear Bore Plug

A—  Bushing Screw (JDE6-1) B—Cylinder Block Web C—Lock Bushing (No. 25916) D—Receiver Cup (JDG604) E—Bushing Driver (JDG603) F—Camshaft Bushing G—Camshaft Bore Plug

Service Camshaft Bushings Using JDG606 Adapter Set

1.        Inspect camshaft journals and bushings for wear or damage. Measure cam journals and bushings to determine if proper oil clearance exists. Replace camshaft and/or bushings as necessary.

Specification

Camshaft Bushing—ID .....  67.076—67.102 mm

(2.6408—2.6418 in.)

Bore in Block ....

69.987—70.013 mm

(2.7554—2.7564 in.)

Removing Camshaft Bushings

Camshaft Bore—Runout .......... 0.038 mm (0.0015 in.) maximum Camshaft Journal—OD .......  66.987—67.013 mm

(2.6373—2.6383 in.)

Camshaft Bushing-to-Journal—Oil

Clearance ..........  0.063—0.115 mm

(0.0025—0.0045 in.)

NOTE: The front two bushings can be reached from the front to the engine. The flywheel and rear  camshaft bore plug (G) must be removed to reach the other two bushings.

Lubricate O-ring on JDG608 Bushing Pilot with clean engine oil before installing in cylinder block web (C).

2.        Remove camshaft bushings (B) using JDG607 Bushing Driver (A) and JDG408 Slide Hammer Adapter (D)  (from JDG405 camshaft Bushing Service Set). Also  use JDG608 Bushing Pilot (E), and D01299AA Slide Hammer (F).

NOTE:  End bushing at front and rear of cylinder block  may be removed with just JDG607 Bushing Driver and D01299AA Slide Hammer.

3.        Inspect and measure each camshaft bushing bore in block as bushings are removed.

Camshaft Rear Bore Plug

A—Bushing Driver (JDG607) B—Camshaft Bushing C—Cylinder Block Web

D—Slide Hammer Adapter (JDG408) E—Bushing Pilot (JDG608)

F—Slide Hammer (D01299AA) G—Camshaft Bore Plug

IMPORTANT:  Oil holes in bushings and cylinder block must be aligned after installation. The elongated hole in bushing must be toward the top. After installation, use a small mirror with extension to be sure oil holes are properly aligned.

4.        Slide a new camshaft bushing (B) onto JDG603 Bushing Driver (A). With JDG608 Bushing Pilot installed in outside cylinder block web (C), assemble D01299AA Slide Hammer (E) and JDG408 Slide Hammer Adapter (D) with bushing driver as shown.

5.        Be sure bushing is started square in bore and oil holes are aligned with holes in block. Pull bushing into bore with slide hammer until properly positioned.

6.        Check bushing-to-cylinder block oil hole alignment using a small mirror with extension.

7.       Apply PERMATEX AVIATION (Form-A-Gasket No. 3) to new camshaft bore steel cap plug and install plug in bore. Plug edge must be seated below edge of  bore.

 Install Camshaft

IMPORTANT: Set engine at TDC of No. 1 piston’s compression stroke before installing camshaft so timing marks on camshaft and crankshaft gears will be aligned.

1.        If camshaft followers were removed with engine on a rollover stand, reinstall followers but do not obstruct camshaft bore. Roll engine to an angle where followers fall away from camshaft bores.

NOTE: If D15001NU Magnetic Holding Tool Set is used, hold camshaft followers away from camshaft bore until camshaft is installed.

2.        Lubricate thrust washer (A) with TY6333 or TY6347 High Temperature Grease and install on camshaft behind inner gear.

3.        Lubricate camshaft lobes with TY6333 or TY6347 High Temperature Grease and bearing journals with clean engine oil.

4.        Carefully install camshaft in cylinder block so that camshaft lobes do not drag in bores. Rotate camshaft during installation to avoid obstruction in any bore.

Camshaft Thrust Washer

A—Thrust Washer

 5. With No. 1 piston on “TDC” compression, align timing marks (A) on camshaft and crankshaft gears. Check injection pump timing.

A—Timing Marks

在既定的燃燒室與噴油設備條件下,柴油的蒸發性決定了混合氣形成的速度與質量,高速柴油機混合氣形成時問極短,故對柴油的蒸發性有較高要求。柴油蒸發性主要是用餾程與閃點來評價的。

     (l)餾程 測定柴油餾程的方法與測定汽油餾程的方法大致相同,所不同的只是柴油餾程的測定項目有50%、90%95%

出溫度。柴油的餾程是按GB/T653686(91)的規定進行。甘孜Perkins帕金斯1506A-E88TAG4約翰迪爾John Deere柴油機銷售售后代理商費用報價單,齊齊哈爾Perkins帕金斯2206D-E13TAG3約翰迪爾John Deere柴油機柴油機油空氣濾清器企業,周口Perkins帕金斯404A-22G1約翰迪爾John Deere柴油機曲軸前后油封網站,保定Perkins帕金斯1106D-E70TAG5約翰迪爾John Deere柴油機曲軸前后油封一臺多少錢,文山Perkins帕金斯403F-15約翰迪爾John Deere柴油機偏心軸一臺多少錢,咸寧Perkins帕金斯4008-30TAG3約翰迪爾John Deere柴油機曲軸一般多少錢,承德Perkins帕金斯,2206A-E13TAG6約翰迪爾John Deere柴油機進排氣門、墊圈哪里有,烏海Perkins帕金斯1204E-E44TTAG2約翰迪爾John Deere柴油機柴油機油空氣濾清器多少錢,廊坊卡特C15約翰迪爾John Deere柴油機原廠配件聯系,甘肅Perkins帕金斯1206F-E70TTAG3約翰迪爾John Deere柴油機曲軸大概的價錢,延邊Perkins帕金斯2206D-E13TAG3約翰迪爾John Deere柴油機活塞、活塞環聯系,臺南Perkins帕金斯1103D-33TA約翰迪爾John Deere柴油機哪里有做維修保養的多少錢,菏澤Perkins帕金斯403A-15G2約翰迪爾John Deere柴油機油水分離器一般多少錢,

50%餾出溫度越低說明柴油中的輕質餾分含量多,柴油機易于起動。但柴油中輕質餾分含量過多,會使噴入氣缸的柴油蒸發太快,易引起全部柴油迅速燃燒,造成壓力劇增,使得柴油機工作粗暴。

90%95%餾出溫度越低,說明柴油中重質餾分含量低,這就使得柴油的燃燒更加充分,不僅可以提高柴油機的動力性,減少機械磨損.避兔約翰迪爾John Deere柴油機產生過熱現象,而且還可使油耗降低。

由上可知,柴油的餾分過輕、過重都是不適宜的。GB25287規定柴油的50燈餾出溫度不高于300'C;90%餾出溫度不高于355C;95%餾出溫度不高于365'C。當然,不同類型的柴油機對柴油餾分的要求也不同,預燃室式和渦流室式柴油機,可以允許使用餾分較寬、較重的柴油;而直噴式柴油機則只能使用餾分較窄、較輕的柴油。(2)閃點 閃點是石油產品在一定試驗條件下加熱后,當油料蒸氣與周圍空氣形成的混合氣接近火焰時,開始發出閃火時的溫度。根據測定儀器之不同,又分為開口閃點與閉口閃點兩種。液體燃料多采用閉日閃點,在同樣條件下閉日閃點要比開日閃點約低10C20C。柴油的閃點是測其閉口閃點,測定時按GB/T26183的規定進行。方法概要:,樣在連續攪拌的條件下用很慢的恒定速率加熱,在規定的溫度間隔,同時中斷攪拌的情況下,將一小火焰引入杯內。試驗火焰引起試樣上的蒸氣閃火時的**低溫度作為閃點。

柴油的閃點既是控制柴油蒸發性的指標,也是確保柴油安全性的指標。閃點低的柴油,其蒸發性好,但柴油的閃點也不能過低。因為:其一,閃點過低,則柴油含輕質餾分過多,使得柴油蒸發性過強,會使得氣缸內混合氣燃燒過猛,氣缸壓力驟增而致柴油機工作粗暴。其二,柴油的閃點又是柴油儲運及使用中的安全指標.對柴油閃點的要求隨約翰迪爾John Deere柴油機的工作條件和油箱的位置而不同。汽車、工程機械等多在露天工作與加油,對閃點要求相對而言不是十分嚴格。而對于一些固定式柴油機八由箱多在室內,對閃點的要求就較嚴格,不可過低八以確保安全。柴油在使用前如需預熱,其加熱溫度應低于其閃點10C20C。

首頁 | 產品展示 | 公司介紹 | 客戶服務 | 技術中心 | 配件中心 | 維修中心 | 聯系我們 版權所有 湖南英珀威機械有限公司

www.mypeopleskills.com 公司地址:長沙市雨花區洞井街道中海瓏悅府1棟1401備案號: 湘ICP備18016793號-2

經營范圍:湖南,長沙發電機、發電機組維修,出租。銷售珀金斯發電機,柴油發電機,發電機組零配件等。
无码专区国产精品视频