Maintenance Manual of 4M11 Series Diesel Engine For Land Power Generators
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Figure 4-36 Diagram for Markings of Engine Double-Stage Balance Mechanism
4. Withdraw the locating bar and insert the bolt. Note: Differentiate the bolt length and ensure
there is no plain washer or spring washer.
5. Pre-tighten the bolt by a pneumatic wrench and measure the gear backlash by special tool.
Note: The gear backlash shall be ≥0.3mm and ≤0.4mm. If the gear backlash is <0.3mm or >0.4mm,
disassemble the double-stage balance mechanism and adjust by adjusting the number of
adjustment shims or finally replace the double-stage balance mechanism. The maximum
number of adjustment shims is 5 pieces and the pre-tightening setting of the pneumatic wrench
shall be level 2.
6. After the proper adjustment of gear backlash, tighten four bolts by a torque wrench and
then apply seal paint to the bolts.
Note: Tightening torque for 4xM10 bolts is 35 N•m +5N•m.
4.4.7.3 Disassembly of Secondary Balance Mechanism
Disassembly of secondary balance mechanism is in the reverse order of assembly.
4.5 Valve Mechanism
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