Service Manual for WP6 Diesel Engine
41
3313 Inspection and Maintenance of Engine Block Assembly
Key point 1:
Assembling:
Apply lubricating oil on bearing surface and thread of cylinder cover bolts, and then tighten them
according to following instructions:
(1) Tighten the four bolts of each cylinder cover with four-axis tightening machine, follow the
procedures below:
a) Tighten to 15Nm b) Tighten to 60Nm c) Tighten for another 230°±4°
(2) If there is no suitable four-axis tightening machine, then tighten the bolts with a torque wrench
according to the following procedures:
a) Pre-tighten each bolt to 30Nm b) Tighten for 120°±4° c) 120°±4° again
Refer to Fig. 3-11 for pre-tightening and tightening order.
Fig. 3-11 Cylinder cover bolts tightening order
(3) Tightening order for the whole machine cylinder covers
Cylinder 3—Cylinder 4—Cylinder 5—Cylinder 2—Cylinder1—Cylinder 6
(4) Tightening torque control range for cylinder cover bolts
M14－12.9: (230~300)Nm
M14－10.9: (190~285)Nm
Key point 2:
Assembling:
Apply grease on seal ring and assemble it on welded elbow, and then insert welded elbow assembly
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