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首頁 技術(shù)中心>活塞冷卻噴頭故障可能導(dǎo)致活塞、活塞銷、連桿銷襯套損壞或無油壓的故障嗎約翰迪爾柴油機(jī)

活塞冷卻噴頭故障可能導(dǎo)致活塞、活塞銷、連桿銷襯套損壞或無油壓的故障嗎約翰迪爾柴油機(jī)

2022/8/26 8:35:22

活塞冷卻噴頭故障可能導(dǎo)致活塞、活塞銷、連桿銷襯套損壞或無油壓的故障嗎約翰迪爾柴油機(jī)


如果完成
4.的檢查和“熱箱”清潔,則拆下約翰迪爾柴油機(jī)正時齒輪系和凸輪軸。(需要氣缸組缸體,請參閱相應(yīng)的050。)

拆除所有外部和內(nèi)部安裝的組

下列部件:5.拆下約翰迪爾柴油機(jī)噴油泵和燃油濾清器總成。(090組)

1.拆下約翰迪爾柴油機(jī)曲軸和皮帶輪(如果以前沒有)遠(yuǎn)離的。(第040組)6.如有必要“加熱油箱”缸體,拆下機(jī)油通道塞、冷卻液通道塞、活塞冷卻

2.拆下所有剩余的潤滑系統(tǒng)節(jié)流孔和約翰迪爾柴油機(jī)序列號標(biāo)牌。組件。(第060組)

3.拆下冷卻液泵和所有其余冷卻系統(tǒng)部件(組070

拆下并清潔活塞冷卻孔

1.拆下所有六個(如圖所示)約翰迪爾柴油機(jī)活塞冷卻孔(A),并檢查每個冷卻孔,確保其未堵塞或損壞。

2.使用軟電線和壓縮空氣清潔孔口。如果條件有問題,請更換。

重要事項:約翰迪爾柴油機(jī)活塞冷卻孔故障可能導(dǎo)致活塞、活塞銷、連桿銷襯套和襯套損壞。如果省略活塞冷卻孔,將導(dǎo)致油壓低或無油壓。

檢查和清潔缸體

注意:必須從約翰迪爾柴油機(jī)缸體上拆下所有部件(包括活塞冷卻孔)、冷卻液通道塞和機(jī)油通道塞,以便檢查和清潔。有關(guān)所有外部和內(nèi)部安裝部件的拆卸,請參閱相應(yīng)的組。

1.使用D17015BR O形圈孔清潔刷或等效刷子徹底清潔缸套O形圈內(nèi)的所有碎屑。

2.拆下約翰迪爾柴油機(jī)氣缸蓋定位銷(如果之前未拆下)。清潔缸體頂部甲板上缸蓋安裝帶帽螺釘?shù)乃新菁y孔。使用JDG681絲錐或等效的9/16-12 UNC-2A絲錐約88.9毫米(3.5英寸)

長的使用壓縮空氣清除帶帽螺釘孔中可能存在的任何碎屑或液體。

重要事項:如果缸體在高溫罐中清潔,請務(wù)必拆下所有鋁制零件。熱罐解決方案可能會損壞或破壞鋁部件。

拆下所有序列號標(biāo)牌。

3.使用清潔溶劑、壓力蒸汽或熱罐徹底清潔砌塊。

4.檢查襯里支撐法蘭(C)是否有毛刺。如果存在毛刺,使用小半月形銼刀并輕輕銼掉(以圓周運動)大約60 角銼削時,不要讓銼刀碰到缸體(B)的頂面。

注意:不要過度銼襯板支撐法蘭。

過多的銼削會損壞襯套支撐法蘭,并導(dǎo)致襯套安裝不當(dāng)。徹底清潔缸體上的所有銼屑。

5.測量約翰迪爾柴油機(jī)缸體中的襯套法蘭沉孔深度(A),并與下面給出的規(guī)范進(jìn)行比較。

測量缸體中的缸套法蘭沉孔深度

A-約翰迪爾柴油機(jī)缸套法蘭沉孔深度B-氣缸體頂部甲板C-缸套支撐法蘭

規(guī)格

氣缸體法蘭沉孔深度……11.913-11.963 mm0.469-0.471英寸)

仔細(xì)檢查砌塊是否有裂縫或任何其他物理損壞。如果懷疑缸體有裂紋,則對缸體進(jìn)行壓力測試。FOS(服務(wù)基礎(chǔ))手冊約翰迪爾柴油機(jī)中概述了壓力測試程序。如果有裂紋或物理損壞的跡象,則更換擋塊。

Complete Disassembly of Cylinder Block (If Required)

If complete inspection and “Hot Tank” cleaning of 4.  Remove timing gear train and camshaft. (Group cylinder block is required, refer to the appropriate           050.)

group for removal of all external and internal  mounted

components listed below:        5.  Remove fuel injection pump and fuel filter assembly. (Group 090.)

1.      Remove crankshaft and pulley if not previously

removed. (Group 040.)    6.  If necessary to “Hot Tank” the block, remove oil gallery plugs, coolant gallery plugs, piston cooling

2.      Remove all remaining lubrication system        orifices and the engine serial number plate. components. (Group 060.)

3.      Remove coolant pump and all remaining cooling system components (Group 070.)

Remove and Clean Piston Cooling Orifices

1.      Remove all six (four shown) piston cooling orifices (A) and inspect each cooling orifice to make sure it is not plugged or damaged.

2.      Use a soft wire and compressed air to clean orifice. Replace if condition is questionable.

IMPORTANT: A piston cooling orifice failure could cause damage to pistons, piston pins, rod pin bushings, and liners. If a piston cooling orifice is left out, low or no oil pressure will result.

Inspect and Clean Cylinder Block

NOTE: All components (including piston cooling orifices), coolant gallery plugs and oil gallery plugs must be removed from the cylinder block for inspection  and cleaning. Refer to the proper group for removal of all external and internal mounted components.

1.      Use D17015BR O-ring Bore Cleaning Brush or an equivalent brush to thoroughly clean all debris from cylinder liner O-ring bores.

2.      Remove cylinder head locating dowels, if not previously removed. Clean out all threaded holes for cylinder head mounting cap screws in top deck of cylinder block. Use JDG681 Tap or an equivalent 9/16-12 UNC-2A tap approximately 88.9 mm (3.5 in.)

long. Use compressed air to remove any debris or fluid which may be present in the cap screw  hole.

IMPORTANT: If cylinder block is cleaned in a hot  tank, be sure to remove any aluminum parts. Aluminum parts can be damaged or destroyed by hot tank solutions.

Remove all serial number plates.

3.      Clean block thoroughly using cleaning solvent, pressure steam, or a hot tank.

4.      Inspect liner support flange (C) for burrs. If burrs are present, use a small half-moon file and LIGHTLY file  (in a circular motion) burr off at approximately a 60 angle. DO NOT let file hit top deck of cylinder block (B) while filing.

NOTE:  DO NOT file liner support flange excessively.

Excess filing can damage liner support flange and allow an improper liner fit. Thoroughly clean all filings from cylinder block.

5.      Measure liner flange counterbore depth (A) in block and compare with specification given below.

 Measuring Liner Flange Counterbore Depth in Block

A—Liner Flange Counterbore Depth B—Top Deck Of Cylinder Block C—Liner Support Flange

Specification

Cylinder Block Flange

Counterbore—Depth.......  11.913—11.963 mm

(0.469—0.471 in.)

Carefully inspect block for cracks or any other physical damage. If a cracked block is suspected, pressure-test the block. A procedure for pressure testing is outlined in FOS (Fundamentals of Service) Manual-ENGINES. Replace block if there is evidence of a crack or physical  damage.

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