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Detroit Diesel — Inspection and repair

A Detroit Diesel service procedure — check it applies to your exact model before use.

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Before you start

  • Before angle-of-rotation tightening, each screw head must be colour-marked so that after tightening it is poss-
  • The additional angles of rotation specified in the tightening specifications must be achieved and may be ex-
  • If no tightening torque tolerance has been specified, the tightening tolerance is + 10% of the
  • If no tightening tolerance is specified, the following tolerances must be observed:
  • + 10° for additional angle of rotation greater than
  • + 5° for additional angle of rotation less than or equal to
  • Tightening must be carried out in accordance with tightening specifications taking the tightening tolerance into
  • – Angle of rotation tightening:
  • – Elongation tightening
  • specified torque.
  • self-monitoring NC screwdriver).
  • consideration.
  • 90°
  • ible to check that the angle of rotation is correct (exception: colour-marking is not necessary in the case of a
  • ceeded within the specified tolerance.

Procedure

  1. 6 Nm
  2. 9 (bright surface or with phosphate coating).
  3. 8
  4. 9
  5. 8
  6. 9
  7. 40 mm
  8. 60 mm
  9. 4° before TDC
  10. 4° after BDC
  11. 0° before BDC
  12. 0° after TDC
  13. 4°
  14. 70 mm
  15. 60 mm
  16. 85 mm
  17. 80 mm

Tools required

  • The screw connections must be tightened by hand with a torque wrench or angle-of-rotation torque wrench.
  • Socket-head screws for 4/2-way valve on mounting plate
  • wrench is possible.
  • The values in the tables are for manual tightening with torque wrench.
  • – good general-purpose tools are provided
  • ance. When using an angle-of-rotation torque wrench, the torque indicated must be within the torque specifi-
  • – special tools are provided
  • ing tool under the sealing ring in the direction of the circumference if the O-ring diameter is sufficiently large.
  • Socket-head screws for exhaust gas diffusor on cylinder
  • The specified tightening torques must be set at the torque wrench without consideration of the specified toler-
  • quired, i.e. mechanical tightening with screwdriver or normal manual tightening with an open-end wrench or box

Specs & torque values

  • 20 Nm...45 Nm
  • 100 Nm
  • 300 to 310 bar
  • (max. 35 Nm)
  • 140 Nm + 20 Nm
  • 50 Nm
  • max. 30 Nm
  • 8 Nm + 1 Nm
  • 60 Nm + 6 Nm
  • 0.70 mm
  • 140 Nm + 10 Nm
  • 20 Nm...70 Nm
  • 1 Nm  0.2 Nm
  • 0.60 mm
  • 100 Nm + 15 Nm
  • 60 Nm
  • Max. shaft length: 176 mm
  • Max. shaft length: 91 mm
  • Max. shaft length : 68.5 mm
  • 57 Nm + 6 Nm
  • 60 Nm + 12 Nm
  • 285 Nm + 30 Nm
  • 33 Nm + 4 Nm
  • 40 Nm + 5 Nm
  • 10 Nm
  • 7.6 Nm
  • 15 Nm...30 Nm
  • 50 Nm + 5 Nm
  • 260 Nm + 10 Nm
  • 52 Nm
  • 6 Nm + 2 Nm
  • 40 Nm + 10 Nm
  • 0.40 mm
  • 0.80 mm
  • Max. shaft length: 84 mm
  • 300 Nm + 30 Nm
  • 20 Nm + 5 Nm
  • 25 Nm
  • 20 Nm
  • 180 Nm
  • 20 Nm + 2 Nm
  • 40 Nm...45 Nm
  • 0.85 mm
  • 200 Nm
  • 100 Nm + 10 Nm
  • Max. shaft length: 212 mm
  • 21 Nm
  • 600 Nm + 60 Nm
  • 35 Nm...40 Nm
  • 260 bar
  • 20 Nm 3 Nm
  • 55 Nm
  • max. 27 Nm

Source: manual:Detroit-Diesel-12V2000N-Maintenance.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.