Manitowoc Grove RT530E-2 Service And Maintenance Manual page 206

SWING SYSTEM
Servicing
As with all highly stressed mechanisms, reasonable
operating procedures are always required. Normal
maintenance should only consist of proper lubrication and a
periodic check of mounting bolt torque values. Lubrication
consists of maintaining the gearbox oil level. Oil in a new
gearbox should be drained and flushed out after
approximately 250 hours of operation, and replaced with
premium quality SSGL-5 (spec 6829012964) after
approximately 500 hours of operation or each year,
whichever occurs first. Operation in high humidity or polluted
air areas will require more frequent changes to minimize
moisture or contaminate accumulation. Change the oil as
follows.
1. Unscrew the drain plug. To ensure all oil has been
removed, unscrew the filler and level plugs.
2. After oil is drained, replace the drain plug and any other
plugs that were removed to drain the oil.
3. Flush the case with a light flushing oil.
6-8
NOTE:
4. To refill with oil, fill through filler plug until it begins to flow
out of the level plug.
5. Tighten the level and filler plugs.
Checking The Oil Level
1. Check the oil level through level plug.
2. If no oil is visible on the level plug, add oil until the level
is between min and max on the level plug.
3. Refer to Lubrication (pg 9- 1).
Testing
1. Test swing of superstructure in each direction. Stop and
start swing several times.
2. Inspect for hydraulic leaks and repair as necessary.
Published 4-22-15, Control # 556-00
RT530E-2 SERVICE MANUAL
Cleaning of the gearbox with a solvent is
recommended to prevent an accumulation of grit
and grime. Avoid steam cleaning where moisture
and dirt might be driven into the vent of the swing
bearing.