SmartROC D65 Tier 4 Final 14 Options
209
Air swivel
Normal maintenance includes lubrication of seals and bearings via the 4 grease nipples
(14) on the shell (1). This must be carried out daily or every 10 engine hours. A maximum
of a couple of presses with grease in each nipple. DO NOT OVER LUBRICATE - Too
much lubrication can pressurise the seals and lead to heat development which damages
seals and bearings.
The normal service life of a seal can be up to 2000 hours, and the service life for shaft and
bearing may be many times this service life. However, seal replacement is unavoidable.
During dismantling, the lock nut (6), retaining washer (7) and holder washer (3) are re-
moved so that the shell (1) can be removed from the shaft (2). Check the seal's running
surfaces on the shaft. If it is very grooved then the shaft is replaced. Check the other parts
in terms of wear/damage and replace if necessary. Replace seals and assemble.
Some consider it necessary to tack weld the air swivel's shaft (2) onto the rotation unit's
shaft. If this is done then brazing lugs must be used on both shafts. The seam between
the shafts must not be welded.
CAUTION
Risk of injury
Tightening must be secure before tack welding.
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