約翰迪爾John Deere柴油發(fā)動(dòng)機(jī)氣門座圈安裝閥座嵌件與拆卸研磨方法

重要事項(xiàng)：約翰迪爾John Deere柴油發(fā)動(dòng)機(jī)閥座研磨只能由熟悉設(shè)備并能夠保持所需規(guī)格的經(jīng)驗(yàn)豐富的人員進(jìn)行。

研磨閥座時(shí)，始終保持工作區(qū)域清潔。必須使用120號(hào)砂石打磨進(jìn)氣門和排氣門座圈（A）。

使用JT05893重型閥座研磨機(jī)套件，研磨閥座，以在氣缸蓋中獲得正確的氣門凹槽。參見測(cè)量閥凹槽序列

本組中較早的數(shù)字。研磨閥座前，確保氣門導(dǎo)管孔清潔。參見清潔氣門導(dǎo)管系列

如果閥座需要研磨，則只需幾秒鐘即可修復(fù)平均閥座。避免過度研磨的傾向。不要對(duì)磨石施加過大壓力。

1.用發(fā)藍(lán)檢查閥座寬度（C）和閥座與閥門之間的接觸模式。座椅寬度必須保持在規(guī)范范圍內(nèi)。使用游標(biāo)卡尺或標(biāo)尺測(cè)量座椅寬度。研磨后徹底清潔閥座區(qū)域，必要時(shí)更換閥門和閥座嵌件。

注：閥座寬度可使用變窄石減小。這將改變閥座頂部的角度（B），并增加直徑。如果閥座寬度太窄，閥門可能會(huì)燒壞或腐蝕。

改變寬度會(huì)改變閥面和閥座之間的精細(xì)接觸。

2.研磨后，務(wù)必使用D11010KW偏心儀測(cè)量閥座跳動(dòng)，并在研磨后檢查氣缸蓋中的凹槽，如后所述。

研磨閥座

測(cè)量閥座

A-閥座插入件B-閥座角度C-閥座寬度D-閥座跳動(dòng)

規(guī)格

閥座研磨角…….30  0.50

排寬度…2.0-3.8毫米（0.079-0.150英寸

進(jìn)氣寬度……1.4-3.8毫米（0.055-0.150英寸）

最大閥座跳動(dòng)量……0.051 mm（0.0020 in.）

拆下氣門座圈并測(cè)量氣缸蓋序列號(hào)（200000-）中的孔

在某些情況下，氣缸蓋中的閥座孔可能損壞或尺寸過大，需要進(jìn)行加工。在這種情況下，超大尺寸的鑲件可用于

僅0.25毫米（0.010英寸）超大尺寸。

規(guī)格

尺寸過大的鑲塊寬度……0.25毫米（0.010英寸）

重要事項(xiàng)：小心不要損壞氣缸蓋拆卸氣門座圈

拆卸座椅時(shí)。

1.使用JDE41296閥座拉拔器（A）拆下閥座插件（如有必要）。拆卸鑲塊時(shí)，可能需要重新擰緊拉拔器上的調(diào)整螺釘。

也可以使用以下方法拆除閥座嵌件：

•小心加熱表面周圍四個(gè)點(diǎn)的鑲塊，直到鑲塊變紅。讓閥座冷卻，然后用螺絲刀小心地撬出嵌件。

加熱閥座插件

2.拆卸嵌件后，徹底清潔A閥座拉拔器周圍的區(qū)域

閥座孔，并檢查是否有損壞或裂紋。

安裝序列號(hào)為（200000-）的閥座嵌件

1.使用JDE7驅(qū)動(dòng)器（A）和JDG605閥座安裝器（B）將插入件驅(qū)動(dòng)到位。JDG605安裝器的大端用于安裝進(jìn)氣門，小端用于安裝排氣門。

2.安裝新的或翻新的閥門和止回閥凹槽。參見本組前面的測(cè)量閥凹槽序列號(hào)（200000-）。

3.根據(jù)需要研磨閥座，以保持正確的閥座凹槽和閥座密封。參見本組前面的研磨閥座序列號(hào)（200000-）。

A驅(qū)動(dòng)器

B-閥座安裝器

安裝閥座嵌件

Grind Valve Seats Serial Number (200,000— )

IMPORTANT:  Valve seat grinding should only be done by experienced personnel familiar with equipment and capable of maintaining required specifications.

ALWAYS keep work area clean when grinding valve seats. A 120-grit stone MUST BE used for grinding both intake and exhaust valve seat inserts (A).

Using JT05893 Heavy-Duty Seat Grinder Set, grind valve seats to obtain correct valve recess in cylinder head. See MEASURE VALVE RECESS SERIAL

NUMBER (200,000— ) earlier in this group. Be sure valve guide bores are clean before grinding valve seats. See CLEAN VALVE GUIDES SERIAL

NUMBER (200,000— ) earlier in this group.)

If valve seats need grinding, only a few seconds are required to recondition the average valve seat. Avoid the tendency to grind off too much. Do not use excessive pressure on the grinding stone.

1.      Check the seat width (C) and contact pattern between the seat and valve with bluing. Seat width MUST BE maintained within specification. Use a vernier caliper or scale to measure seat width. Thoroughly clean seat area after grinding and replace valves and valve seat inserts as necessary.

NOTE: Valve seat width can be reduced with a narrowing stone. This will change the angle (B) at the top of the seat and increase the diameter. If valve seat width is too narrow, valve may burn or  erode.

Varying the width changes the fine contact between valve face and seat.

2.      ALWAYS measure valve seat runout after grinding using D11010KW Eccentrimeter and check recess in cylinder head after grinding as described later.

Grinding Valve Seats

Measuring Valve Seats

A—Valve Seat Insert B—Valve Seat Angle C—Valve Seat Width D—Valve Seat Runout

Specification

Valve Seat Grinding—Angle ........  30  0.50

Exhaust Width....  2.0—3.8 mm (0.079—0.150 in.)

Intake Width .....  1.4—3.8 mm (0.055—0.150 in.)

Maximum Seat Runout......  0.051 mm (0.0020 in.)

Remove Valve Seat Inserts and Measure Bores in Cylinder Head Serial Number (200,000— )

In some cases the valve seat bore in the cylinder head may become damaged or oversized and will require machining. In this case, oversize inserts are available  in

0.25 mm (0.010 in.) oversize only.

Specification

Oversize Inserts—Width.....  0.25 mm (0.010 in.)

IMPORTANT:  Be careful not to damage cylinder head         Removing Valve Seat Inserts

when removing seats.

1.      Remove valve seat insert (if necessary) with JDE41296 Valve Seat Puller (A). Adjusting screw on puller may need to be retightened during removal of inserts.

Valve seat inserts may be also removed using the following method:

•      Carefully heat insert at four points around face until insert becomes red hot. Allow seat to cool and carefully pry out the insert(s) with a screwdriver.

Heating Valve Seat Inserts

2.      After removal of inserts, thoroughly clean area around          A—Valve Seat Puller

valve seat bore and inspect for damage or  cracks.

Install Valve Seat Inserts Serial Number (200,000— )

1.      Use the JDE7 Driver (A) along with JDG605 Valve Seat Installer (B) to drive inserts into place. The larger end of JDG605 Installer is used to install intake valves and the smaller end is used to install exhaust  valves.

2.      Install new or refaced valves and check valve recess. See MEASURE VALVE RECESS SERIAL NUMBER (200,000— ) earlier in this group.

3.      Grind valve seats as required to maintain correct valve recess and valve-to-seat seal. See GRIND VALVE SEATS SERIAL NUMBER (200,000— ) earlier in this group.

A—Driver

B—Valve Seat Installer

 Installing Valve Seat Inserts

  約翰迪爾基金會(huì)將向國(guó)際紅十字會(huì)捐贈(zèng)25萬美元，用于購(gòu)買、分發(fā)四川地震受災(zāi)人民需要的應(yīng)急物資。

    此外，對(duì)于全球迪爾員工在整個(gè)2008年（至2008年10月31日為止）奉獻(xiàn)的捐款，阿壩Perkins帕金斯1506A-E88TAG4強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動(dòng)機(jī)柴油泵、噴射泵組件代理商,漳州Perkins帕金斯402D-05G強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動(dòng)機(jī)節(jié)溫器去哪找,嘉興Perkins帕金斯2206A-E15TAG3強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動(dòng)機(jī)柴油機(jī)油空氣濾清器歡迎來電,寧德Perkins帕金斯1106D-E70TAG3強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動(dòng)機(jī)上下大修包代理商,定西珀金斯2506-E15柴油機(jī)原廠配件中心,江蘇Perkins帕金斯1506D-E88TAG5強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動(dòng)機(jī)啟動(dòng)馬達(dá)費(fèi)用,安徽Perkins帕金斯1106D-E70TAG4強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動(dòng)機(jī)啟動(dòng)馬達(dá)哪家好,梅州Perkins帕金斯1206F-E70TTAG4強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動(dòng)機(jī)偏心軸大概的價(jià)錢,綏化CATC9強(qiáng)鹿約翰迪爾John Deere柴油發(fā)動(dòng)機(jī)多小錢專業(yè)服務(wù)中心,基金會(huì)將按1：1的比例，給予國(guó)際紅十字會(huì)同等金額的捐款（即：如果一位迪爾員工在2008年共捐贈(zèng)1000元，基金會(huì)也將相應(yīng)捐贈(zèng)1000元 )。截至到2008年5月20日，迪爾中國(guó)區(qū)員工的捐款總額已超過21.6萬元，目前，捐款仍在繼續(xù)。 約翰迪爾將繼續(xù)關(guān)注災(zāi)區(qū)恢復(fù)建設(shè)的工作進(jìn)程，并在必要時(shí)提供其他支持。（約翰迪爾基金會(huì)介紹：約翰迪爾基金會(huì)成立于1948年，是迪爾公司開展慈善事業(yè)的主要渠道，捐助教育、人類服務(wù)、藝術(shù)與文化、社區(qū)發(fā)展和解決全球饑餓問題的項(xiàng)目。）