Yetter TITAN Series Owner's Manual page 15

Lubricate with grease at hourly interval indicated on symbol.
Lubrication Intervals
Important: The recommended service intervals are based on normal
operating conditions; severe or unusual conditions may require more
frequent lubrication.
Perform each lubrication and service procedure at the beginning and end of
each season.
Clean grease fittings before using grease gun to avoid injecting dirt and grit
into the bearing. Replace and lost or broken fittings immediately. If a fitting
fails to take grease, remove and clean thoroughly. Replace if necessary.
Also check for failure of adjoining parts.
1. When assembling the spoke wheels, bearing assembly and hubcap,
be sure to align the grease transfer hole in the spoke wheel with the
groove in the hubcap and hole in the hub to allow grease passage.
2. Assemble the wheels, hubs, and caps.
3. Grease the wheel/hub/bearing assembly.
15
MAINTENANCE
Bearing Replacement Installation