PAGE 90 — ST-70 — PARTS & OPERATION MANUAL — REV. #4 (05/29/07)
ST-70 — SERVICE INFORMATION
Wheel Bearings
After every 6 months of operation inspect the wheel bearings.
Once a year, or when required, disassemble the wheel hubs
remove the old grease and repack the bearings forcing grease
between rollers, cone and cage with a good grade of high speed
wheel bearing greases (never use grease heavier than 265
A.S.T.M. penetration “No. 2.”). Fill the wheel hub with grease to
the inside diameter of the outer races and also fill the hub grease
cap. Reassemble the hub and mount the wheel. Then tighten
the adjusting nut, at the same time turn the wheel in both
directions, until there is a slight bind to be sure all the bearing
surfaces are in contact. Then back off the adjusting nut
1
/
6
to ¼
turn or to the nearest locking hole or sufficiently to allow the
wheel to rotate freely within limits of .001” to .010” end play.
Lock the nut at this position. Install the cotter pin and dust cap,
and tighten all hardware.
Brake system
The brake system should be periodically checked. Look for
fluid leaks worn or cracked hoses. Check the reservoir for proper
fluid levels. The Atwood surge brake should be checked for
damage. Make sure that all links and pivots are kept lubricated.
Problem
Squeaking, chatter or chucking.
Problem
Brake overheating, side pull, brakes do not operate, poor brake
performance.
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