Copyright Winterthur Gas & Diesel Ltd. All rights reserved. By taking possession of the drawing, the recipient recognizes and honors these rights. Neither the whole nor any part of this drawing may be used in any way for construction, fabrication, marketing or any other purpose nor copied in any way nor made accessible to third parties without the previous written consent of Winterthur Gas & Diesel Ltd.
Intervals & Lifetime
[operating hours]
Main fuel and lubricating oil filters
Check filter elements - in particular for white metal particles (clean or
replace filter as necessary). Follow manufacturer’s instructions
Calculate quality, concentration of inhibitor and pH value (follow
instructions of inhibitor manufacturer)
Check pre-tension of foundation bolts, first check after 1500 Op. h.
Check condition of rubber gasket in the vertical oil drain to sump tank (see
SPC 9722), first time at the earliest opportunity after ship delivery.
30000 (replacement
recommended)
Estimated lifetime: Bedplate foundation bolts
Visual examination, 100 Op. h. after overhaul works: search for white
metal particles from bearings and for abnormalities in general.
Main bearing (Group 12xx)
Bearing shell inspection is only necessary if bearing clearance, crankshaft
deflection, wire check, oil analysis or crankcase inspection indicates
excessive wear or damage
at indications of excessive
wear or damage
Bearing edge check by wire
Check bearing clearance see 0330-1
Estimated lifetime: Main bearing shell
9000 (replacement if
required)
Thrust bearing (Group 12xx)
Check axial and vertical clearances
Check bottom drain for free passage
Thrust bearing pads inspection is only necessary if bearing clearance, oil
analysis or crankcase inspection indicates excessive wear or damage
at indications of excessive
wear or damage
Estimated lifetime: Thrust bearing
engine lifetime
(replacement if required)
Engine stays (Group 97xx)
Friction type: Check pre-tension of screws and remove corrosion marks
from friction elements, first time after sea trial
Hydraulic type: Check oil pressure at the gauge
Check pre-tension, if necessary re-tension, first time after one year of ship
delivery
Estimated lifetime: Tie rod
Cylinder liner (Group 21xx)
Measure liner wear (in installed condition)
Replace (soft iron) joint ring between cylinder liner and cylinder cover
Replace O-rings of water guide jacket and transition tubes
Check condition of antipolishing ring
Grind off wear ridge in bore
Refinish lubricating grooves
Clean scavenge ports and refinish their edges
Estimated lifetime: Cylinder liner
Lubricating quill (pulse lubrication,
group 21xx)
Check function and tightness
Check function of non-return valves
Gas admission valve (GAV, group
21xx)
Perform pressure check of gas manifolds for each engine side individually.
Tightness of the GAVs, the vent valve and the shut-off valve can be
confirmed by this check
Overhaul/replace compression spring including valve seat lapping
Visual check of compensator gas inlet pipe
Estimated lifetime: Rail valve
Estimated lifetime: Housing and servo drive
Piston rod gland (Group 23xx)
Clean rings, establish wear
Maintenance Intervals /
Lifetime
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