Manitowoc Published 11-22-17, Control # 257-02 7-17
MLC300 SERVICE/MAINTENANCE MANUAL POWER TRAIN
Changing the Oil
See Figure 7-15 for the following procedure.
Change the oil when the pump drive is warm.
NOTE: To prevent harmful contaminants from entering the
pump drive, thoroughly clean any components
before disconnecting or connecting them.
1. Lockout-tagout the crane.
2. Remove the fill plug (2) to vent the gearbox.
3. Remove the dust cap from the quick-drain valve (4).
4. Place the hose from the quick-drain drainer assembly
(Figure 7-14
) into an appropriate container for collecting
the drained oil.
5. Thread the quick-drain drainer assembly all the way
onto the quick-drain valve (4). The poppet inside the
valve will open, allowing the oil to drain from the
gearbox.
6. Once the gearbox has finished draining, remove the
quick-drain drainer assembly.
7. Fasten the dust cap to the quick-drain valve (4).
8. Fill the gearbox with the specified oil as follows.
a. If not already done, remove the fill plug (2).
b. Using an appropriate funnel, add oil through the fill
plug opening so the oil is at the full mark on the
dipstick (3). Do not overfill.
c. Install the fill plug (2).
9. Dispose of the drained oil according to local
environmental regulations.
FIGURE 7-15
Item Description
1Breather
2 Fill Plug
3Dipstick
4 Quick-Drain Valve
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