Checking Crankshaft Vibration Damper; Cylinder Engine Only - Northern Lights OM-C3 Operator's Manual

Checking Crankshaft Vibration Damper

(6-Cylinder Engine Only)

1. Remove belts (shown removed).
2. Grasp vibration damper with both hands and attempt
to turn it in both directions. If rotation is felt, damper is
defective and should be replaced.
IMPORTANT: The vibration damper assembly is not
repairable. For all except 6068SFM75/AFM75,
replace damper every 4500 hours or 60 months,
whichever occurs first. Replace viscous damper
on 6068SFM75/AFM75 engines every 8000 hours.
3. Check vibration damper radial runout by positioning
a dial indicator (A) so probe contacts damper outer
diameter.
4. With engine at operating temperature, rotate
crankshaft using either JDE83 or JDE81-1 Flywheel
Turning Tool.
5. Note dial indicator reading. If runout exceeds
specifications given below, replace vibration damper.
Specification
Vibration
Damper—Maximum
Radial Runout . ........................................................... 1.50 mm (0.060 in.)
Inspect and Repair Sea Water Pump
(4045TFM85)
• Inspect pump housing for seal leakage
1. Inspect the sea water pump housing weep hole (A),
if equipped, for evidence of water or oil indicating seal
leakage.
If water leakage is evident, order a RE49490 Impeller
Repair Kit and replace impeller and front housing/shaft
seal.
If oil leakage is evident, order a RE49491 Major Repair
Kit and replace all internal components except shaft. An
arbor press and drivers are needed to install this kit. Have
an experienced technician install this kit.
Lubrication&Maintenance/2000 Hour/24 Month
Continued on next page
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Grasp Vibration Damper
Check Runout
Inspect Sea Water Pump
A—Weep Hole (Earlier Engines
Only)
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