WD615欧Ⅱ系列柴油机维修保养手册
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Maintenance Manual for WD615 Series EuroⅡDiesel Engine
按下列顺序拧紧：
Following such tightening sequence：
第一步：气缸盖安装好后须找正，即排气口侧应在一个平面内：所有螺栓按 30N·m
预紧。
Step 1：Align cylinder head after assembly，i．e．the exhaust port side of cylinder heads
should be in the same plane．All the bolts should be tightened beforehand，and the torque is
30N·m．
第二步：24 根主螺栓用 200N·m 力矩按上图所示主螺栓次序拧紧。
Step 2：Tighten 24 pcs main bolts as the sequence in above figure，and the torque is
200N·m
第三步：7 根副螺栓螺母用 100N·m 力矩按上图所示副螺栓次序拧紧。
Step 3：Tighten 7 pcs auxiliary bolts as the sequence in above figure，and the torque is
100N·m
第四步：主螺栓按上图次序旋转 90
。
。
Step 4：Turn the main bolts 90
。
as the sequence in above figure．
第五步：副螺栓螺母按上图次序旋转 90
。
Step 5：Turn the auxiliary bolts 90
。
as the sequence in above figure．
第六步：主螺栓按上图次序再次旋转 90
。
。扭矩达到 240-340 N·m。
Step 6：Turn the main bolts 90
。
as the sequence in above figure again，and the torque
range is 240—340 N·m．
第七步：将副螺栓螺母按上图次序再次旋转 90
。
，扭矩同时达到 120~160N·m。
Step 7：Turn the auxiliary bolts 90
。
as the sequence in above figure again．the torque
range is 120 ～ 160 N·m．
对达不到最终扭矩要求的螺栓应更换，主螺栓允许重复使用 3 次，副螺栓允许重复
使用 2 次。
Replace those bolts that cannot reach required torque range．The main bolt is allowed to
be reused for 3 times．and the auxiliary bolt is allowed to be reused for 2 times．
3．连杆螺栓：
Connecting rod Bolt：
两根 M14x1.5 19mm 套筒扳手
Total nos．：2 pcs M14x1.5 for each connecting rod Tool：19mm sleeve wrench
