Manitowoc Grove RT9130E-2 Service And Maintenance Manual page 240

SWING SYSTEM
8. Service the gearbox per the following instructions.
Servicing
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
after approximately 250 hours of operation, and replaced
with premium quality SSGL-5 after about 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.
Oil Changing
Change the oil as follows.
1. Unscrew drain plug; remove breather and dipstick.
Ensure all oil has been removed.
2. Flush the case with a light flushing oil. Flushing of the
gearbox with a solvent helps prevent an accumulation of
contaminates . Avoid steam cleaning where moisture
6-10
and dirt might be driven into the vent of the swing
bearing.
3. After oil is drained, reinstall the drain plug and any other
plugs that were removed to drain the oil.
4. To refill with oil, make sure the breather is open. Fill until
proper location on dipstick.
5. Tighten breather and dipstick.
Checking Oil Level
1. Check level on dipstick
2. If no lubricant is visible on dipstick, add SSGL-5 until
between minimum and maximum on dipstick. Refer to
Lubrication, page 9-1.
3. Reinstall the dipstick in the brake housing.
Testing
1. Test swing of superstructure in each direction. Stop and
start swing several times.
2. Inspect for leaks. Make repairs as necessary.
Published 11-22-2016, Control # 345-12
RT9130E-2 SERVICE MANUAL