約翰迪爾柴油機止回閥間隙進排氣門間隙檢查是多小怎么調氣門間隙過大會導致什么后果

氣門間隙過小會使氣門超時。

高溫燃燒氣體沖擊導致閥門過熱

超時時通過閥門。過熱會延長閥桿，從而妨礙閥門正確就位。閥門的閥座太短或太差，以至于沒有時間進行正常的熱傳遞到冷卻系統(tǒng)中，導致閥門燒壞和低功率。

氣門間隙過大會導致氣門正時滯后，導致強鹿約翰迪爾柴油發(fā)動機氣門傳動系不平衡。在進氣沖程期間，燃油-空氣混合物進入氣缸的時間較晚。排氣閥提前關閉，防止廢氣從氣缸中完全排出。此外，氣門關閉時會產生很大的沖擊，這可能導致氣門破裂或斷裂，并磨損凸輪軸和從動件。

注意：為了防止在執(zhí)行氣門調整時強鹿約翰迪爾柴油發(fā)動機意外起動，

始終斷開蓄電池負極（-）端子。

重要事項：必須在強鹿約翰迪爾柴油發(fā)動機冷卻時檢查和調整氣門間隙。

1.斷開托架線束（圖示已拆下）。

2.拆下帶有通風管的搖臂蓋（A）。

拆下搖臂蓋

重要事項：目視檢查

氣門嘴和搖臂耐磨墊。A搖臂蓋

檢查所有零件是否過度磨損、破損或裂紋。更換可見損壞的零件。

應更徹底地檢查氣門間隙過大的搖臂，以識別損壞的零件。

3.從缸體孔上拆下塑料塞，然后安裝JDE81-1或JDG820飛輪車削工具（A）和JDE81.4正時銷（B）。

4.使用飛輪盤車工具旋轉強鹿約翰迪爾柴油發(fā)動機，直到正時銷接合飛輪上的正時孔。

5.如果1號（前）氣缸的搖臂松動，則強鹿約翰迪爾柴油發(fā)動機處于1號“上止點壓縮”

6.如果6號（后）氣缸的搖臂松動，則強鹿約翰迪爾柴油發(fā)動機處于6號“上止點壓縮”。將強鹿約翰迪爾柴油發(fā)動機旋轉一整圈（360) 至1號

“TDC壓縮。”

7.將強鹿約翰迪爾柴油發(fā)動機鎖固定在1號活塞壓縮沖程的“TDC”處，使用彎曲塞尺檢查1號、3號和5號排氣門以及1號、2號和4號進氣門上的氣門間隙。

規(guī)格進氣門間隙檢查（搖臂到氣門尖端，帶強鹿約翰迪爾柴油發(fā)動機冷）-間隙…0.30-0.41 mm（0.012-0.016英寸）

排氣門間隙檢查（強鹿約翰迪爾柴油發(fā)動機冷態(tài)時搖臂至氣門嘴）-間隙0.51-0.61 mm使用彎曲塞尺檢查氣門間隙（0.020-0.024英寸）

8.將飛輪旋轉360度 直到6號活塞處于其壓縮沖程的“上止點”。6號活塞的搖臂應松動。

9.檢查2、4和6號排氣門以及3、5和6號進氣門的氣門間隙是否符合相同規(guī)格。

10.如果需要調整氣門間隙，請參見調整氣門間隙，將在本節(jié)后面介紹。

11.安裝帶有通風管的搖臂蓋，并按所示順序將帶帽螺釘擰緊至規(guī)格。

規(guī)格搖臂蓋到托架蓋螺釘扭矩……8牛•米（5.9磅-英尺）閥門檢查順序A-強鹿約翰迪爾柴油發(fā)動機前部B-編號。1缸“TDC”C-No。6缸“TDC”強鹿約翰迪爾柴油發(fā)動機D-前部

調整氣門間隙

氣門間隙過小會使氣門超時。閥門打開太早，關閉太遲。由于高溫燃燒氣體的沖擊，這會導致閥門過熱

超時時通過閥門。過熱會延長閥門

防止閥門正確就位的閥桿。閥門的閥座太短或太差，以至于沒有時間進行正常的熱傳遞到冷卻系統(tǒng)中，導致閥門燒壞和低功率。

氣門間隙過大會導致氣門正時滯后，導致強鹿約翰迪爾柴油發(fā)動機氣門傳動系不平衡。在進氣沖程期間，燃油-空氣混合物進入氣缸的時間較晚。排氣閥提前關閉，防止廢氣從氣缸中完全排出。此外，氣門關閉時會產生很大的沖擊，這可能導致氣門破裂或斷裂，并磨損凸輪軸和從動件。

執(zhí)行強鹿約翰迪爾柴油發(fā)動機磨合

1.在低怠速空載下運行強鹿約翰迪爾柴油發(fā)動機2分鐘。檢查有無液體泄漏。

2.將轉速提高至快速怠速，然后將負載降至額定轉速以上50 RPM，持續(xù)20分鐘。

注：測功機是首選的負載控制，但可以通過將阻力負載與檔位選擇匹配來加載強鹿約翰迪爾柴油發(fā)動機。

3.重新檢查氣門間隙，必要時進行調整。請參閱本組前面的檢查和調整氣門間隙。

4.安裝搖臂蓋墊片和蓋。將搖臂蓋帶帽螺釘擰緊至技術規(guī)格。

規(guī)格搖臂蓋至氣缸有頭螺釘扭矩8牛·米（6磅-英尺）（72磅-英寸）

不需要在強鹿約翰迪爾柴油發(fā)動機磨合后重新擰緊缸蓋有頭螺釘。

重要事項：強鹿約翰迪爾柴油發(fā)動機磨合后，請遵循以下步驟

操作員手冊中列出的建議每小時服務間隔。

Check Valve Clearance Serial Number (200,000— )

Too little valve clearance throws valves out of  time.

valves to overheat due to hot combustion gases  rushing

past valves when out of time. Overheating lengthens valve stems which prevents proper seating of valves. The  valves seat so briefly or poorly that normal heat transfer into the cooling system does not have time to take place, causing burned valves and low power.

Too much valve clearance causes a lag in valve timing, causing engine valve train imbalance. The fuel-air mixture enters the cylinders late during intake stroke. The exhaust valve closes early and prevents waste gases from being completely removed from cylinders. Also, the valves close with a great deal of impact, which may crack or break the valves and scuff the camshaft and followers.

     CAUTION: To prevent accidental starting of engine while performing valve adjustments,

always disconnect NEGATIVE (—) battery terminal.

IMPORTANT: Valve clearance MUST BE checked and adjusted with engine COLD.

1.      Disconnect carrier wiring harness (shown removed).

2.      Remove rocker arm cover (A) with vent tube.

Remove Rocker Arm Cover

IMPORTANT:  Visually inspect contact surfaces of

valve tips and rocker arm wear pads.     A—Rocker Arm Cover

Check all parts for excessive wear, breakage, or cracks. Replace parts that show visible damage.

Rocker arms that exhibit excessive valve clearance should be inspected more thoroughly to identify damaged parts.

3. Remove plastic plug from cylinder block bores and install JDE81-1 or JDG820 Flywheel Turning Tool (A) and JDE81-4 Timing Pin (B).

4. Rotate engine with the flywheel turning tool until timing pin engages timing hole in flywheel.

5. If the rocker arms for No. 1 (front) cylinder are loose, the engine is at No. 1 “TDC-Compression.”

6.If the rocker arms for No. 6 (rear) cylinder are loose, the engine is at No. 6 “TDC-Compression.” Rotate the engine one full revolution (360) to No. 1

“TDC-Compression.”

7.      With engine lock-pinned at “TDC” of No. 1 piston’s compression stroke, use a bent feeler gauge to check valve clearance on Nos. 1, 3, and 5 exhaust valves and Nos. 1, 2, and 4 intake  valves.

Specification

Intake Valve Clearance Checking (Rocker Arm-to-Valve Tip With

Engine Cold)—Clearance.....  0.30—0.41 mm

(0.012—0.016 in.)

Exhaust Valve Clearance Checking (Rocker Arm-to-Valve Tip With Engine Cold)—

Clearance 0.51         —0.61 mm

Checking Valve Clearance Using Bent Feeler Gauge

(0.020—0.024 in.)

8.      Rotate flywheel 360 until No. 6 piston is at “TDC” of its compression stroke. Rocker arms for No. 6 piston should be loose.

9.      Check valve clearance to the same specifications on Nos. 2, 4, and 6 exhaust and Nos. 3, 5, and 6 intake valves.

10.   If valve clearance needs to be adjusted, see ADJUST VALVE CLEARANCE SERIAL NUMBER (200,000—

), later in this section.

11.   Install rocker arm cover with vent tube and tighten cap screws to specifications in order shown.

Specification

Rocker Arm Cover-to-Carrier Cap

Screws—Torque .....  8 N•m (5.9 lb-ft)

Valve Checking Sequence

A—Front of Engine B—No. 1 Cylinder “TDC” C—No. 6 Cylinder “TDC” D—Front of Engine

Adjust Valve Clearance Serial Number (200,000— )

Too little valve clearance throws valves out of time.  Valves open too early and close too late. This causes the valves to overheat due to hot combustion gases  rushing

past valves when out of time. Overheating lengthens valve

stems which prevents proper seating of valves. The valves seat so briefly or poorly that normal heat transfer into the cooling system does not have time to take place, causing burned valves and low power.

Too much valve clearance causes a lag in valve timing, causing engine valve train imbalance. The fuel-air mixture enters the cylinders late during intake stroke. The exhaust valve closes early and prevents waste gases from being completely removed from cylinders. Also, the valves close with a great deal of impact, which may crack or break the valves and scuff the camshaft and followers.

Perform Engine Break-In Serial Number ( —199,999)

1.      Run engine at slow idle no load for 2 minutes. Check for liquid leaks.

2.      Increase RPM to fast idle, then load down to 50 rpm above rated speed for 20 minutes.

NOTE: Dynamometer is the preferred load control, but engine can be loaded by matching drag loads to gear selection.

3.      Recheck valve clearance and adjust as necessary. See CHECK AND ADJUST VALVE CLEARANCE SERIAL NUMBER ( —199,999) earlier in this group.

4.      Install rocker arm cover gasket and cover. Tighten rocker arm cover cap screws to specifications.

Specification

Rocker Arm Cover-to-Cylinder

Head Cap Screw—Torque.......... 8 N•m (6 lb-ft) (72 lb-in.)

Retorque of cylinder head cap screws after engine break-in is not required.

IMPORTANT:  After engine break-in, follow ALL

recommended hourly service intervals outlined in your Operator’s Manual.

渦輪壓縮機進氣溫度傳感器測量進入可變幾何尺寸渦輪增壓器 (VGT) 壓縮機一側的過濾后的空氣的溫度。 ECU 使用此傳感器信息來幫助確定 VGT 渦輪增壓器葉片起動和廢氣再循環(huán) (EGR) 氣門定位。渦輪轉速傳感器測量 VGT 渦輪增壓器的轉速。ECU 使用此傳感器信息來保護強鹿約翰迪爾柴油發(fā)動機。高轉速讀數將導致燃油過少，具體情況取決于強鹿約翰迪爾柴油發(fā)動機保護設計和應用。冷卻廢氣再循環(huán) (EGR) 排氣溫度傳感器測量離開 EGR 冷卻器之后進入 EGR 氣門和 EGR 進氣混合器之前的廢氣的溫度。ECU 使用此傳感器信息和冷卻 EGR 新鮮和混合進氣溫度傳感器信息來計算溫度差系數。ECU 使用此系數來確定 VGT 渦輪增壓器葉片起動和 EGR 氣門定位。湛江Perkins帕金斯2506C-E15TAG3強鹿約翰迪爾柴油發(fā)動機氣門室蓋罩哪里有,玉樹Perkins帕金斯2506C-E15TAG3強鹿約翰迪爾柴油發(fā)動機柴油機油空氣濾清器在什么地方買,嘉義Perkins帕金斯403F-07強鹿約翰迪爾柴油發(fā)動機配件中心庫電話,白銀珀金斯柴油強鹿約翰迪爾柴油發(fā)動機多小錢商家,張家口Perkins帕金斯402D-05強鹿約翰迪爾柴油發(fā)動機充電發(fā)電機代理商,防城港Perkins帕金斯2506C-E15TAG3強鹿約翰迪爾柴油發(fā)動機噴油嘴多少錢中心,朔州Perkins帕金斯1506C-E88TAG1強鹿約翰迪爾柴油發(fā)動機配件中心庫哪里有,新竹Perkins帕金斯1206E-E66TA強鹿約翰迪爾柴油發(fā)動機散熱器組件電話,

油軌壓力傳感器位于靠近泵的 HPCR 燃油系統(tǒng)的共軌端部，用于測量高壓共軌中的燃油壓力。ECU 根據此壓力大小調整輸油量以獲得所需性能。由于油軌上的手動限壓器會升高以降低壓力，因此高壓讀數不會導致強鹿約翰迪爾柴油發(fā)動機減速。ECU 還使用此傳感器監(jiān)控電子噴油嘴的操作。燃油含水 (WIF) 傳感器測量液體阻力，以檢測燃油中是否含水。由于水與燃油產生的阻力不同，因此阻力讀數可確定燃油中含水的多少。ECU 使用此傳感器信息來保護強鹿約翰迪爾柴油發(fā)動機。如果檢測到水，ECU 將根據強鹿約翰迪爾柴油發(fā)動機保護設計和應用減少對強鹿約翰迪爾柴油發(fā)動機的輸油量。系統(tǒng)低壓一側的燃油壓力由燃油壓力傳感器監(jiān)控。低壓讀數可能是燃油過濾器堵塞或電子傳輸泵出現故障引起的。

檢測您的知識Service ADVISOR 2.6部件位置與系統(tǒng)流程概述

在**后一個主題中，我們將了解在 Service ADVISOR™ 2.6 中對等級 III 強鹿約翰迪爾柴油發(fā)動機的測試和診斷。

Service ADVISOR ™ 2.6－等級3強鹿約翰迪爾柴油發(fā)動機測試

對于等級 3 強鹿約翰迪爾柴油發(fā)動機，Service ADVISOR 中添加了 4 種新的交互式測試：廢氣再循環(huán)氣門重新校準，線束診斷模式測試，噴油嘴校準，和渦輪識別值重置測試下面，我們快速了解一下這些測試。