Hyundai HL930A Operation & Maintenance Manual page 225

(2) Viscous
The silicone fluid in the vibration damp-
er will become solid after extended
service and will make the damper inop-
erative. An inoperative vibration damper
can cause major engine or drivetrain
failures.
Check the vibration damper for evidence
of fluid loss, dents, and wobble. Inspect
the vibration damper thickness for any de-
formation or raising of the damper cover
plate.
If any of these conditions are identified, contact your local Cummins authorized repair location
to replace the vibration damper.movement is detected.
21) OVERHEAD SET ADJUSTMENT
This procedures are perform the repair shop.
Service tools
- Cummins barring tool, p/no. 3824591
- Feeler gauge
(1) Prior to removing any components, use com-
pressed air to remove any loose debris from
around the mounting fasteners and sealing
joints.
(2) Disconnect the breather tube connection at the
back of the rocker lever cover.
In general, two types of breather tube connec-
tions are used at the rocker lever cover.
• A clamping plate and capscrew hole the
breather tube connection to the rocker lev-
er cover. Remove the capscrew and
clamping plate to disconnect the breather
tube connection from the rocker lever cov-
er.
• One or two capscrew(s) directly mount the
breather tube connection to the rocker lev-
er cover. Remove the capscrew(s) to dis-
connect the breather tube connection from the rocker lever cover.
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