Maeda MC285CB-3 - Replace Oil in Winch Reduction Gearcase

M A E D A Mini-Crawler Crane Section 5 – PERIODIC MAINTENANCE
9/2020 MC285CB-3 5-33
Replace Oil in Winch Reduction
Gearcase
WARNING! Oil is at elevated temperatures
immediately after machine operation.
Do not remove the plug of the inspection port
or drain port immediately. Wait until the oil
cools down.
CAUTION: See “LUBRICATING OIL” on page
5-7 for the oil to be used.
CAUTION: When rotating the winch, unstow
the hook.
CAUTION: After oil replacement, use seal tape
for the threaded portion of the oil level
inspection plug and drain plug to stop the
leakage and securely tighten the plugs.
• Oil drain pan: Prepare a container of at least 1 L.
• Allen key to remove a plug: 5 mm
• Oil replacement quantity in slewing reduction
gearcase: 0.5 L
1. Place the machine on a level surface.
2. Rotate the rotary of the No.4 outrigger
outward so that the inspection part of the
winch reduction gearcase of the post side can
be seen.
3. Remove the inspection cover (1) by
unscrewing the mounting bolts (2) (4 bolts).
Fig. 5-46
4. Turn the winch slowly to a position where
both the oil inspection plug (G) and drain plug
(P) can be seen.
Fig. 5-47
a. Stop it at a position where the oil
inspection plug is visible through the
inspection hole (A) on the post side.
b. Stop it at a position where the drain plug of
the reduction gearcase is visible at the
upper part of the inspection hole (B).
5. With the Allen key (C), turn and remove the
drain plug (P).
Fig. 5-48
6. Mount the elbow (E) for draining oil to the
screw hole of the drain plug.
7. Place a container (H) to collect the drained oil
just below the elbow.
8. With the Allen key (C), turn and remove the
oil inspection plug (G). Gear oil in the
reduction gearcase is drained.
Fig. 5-49
9. After gear oil in the reduction gearcase is
completely drained, detach the elbow, and
reinstall the drain plug and securely tighten it.