Maeda MC405C-3 - Greasing Machine Units

Mini-Crawler Crane M A E D A Section 5 – FLY-JIB INSPECTION AND MAINTENANCE
1/2019 MC405C-3 5-87
Criteria for Winch Wire Rope Replacement
A wire rope undergoes wear and tear over time.
Prompt replacement is required if any of the
following events appears in the wire rope.
• 10% or more of strands (except a filler wire) in
a twist of the wire rope (6 crests) is broken.
Fig. 5-203
NOTICE: Replace the wire rope for winching if 9
strands or more are broken.
Fig. 5-204
• Wear equivalent to 7% or more of a nominal
diameter occurs in the wire rope diameter.
NOTICE: Replace an 8-mm-dia wire rope if it is
7.5mm in diameter.
• A kink is formed.
Fig. 5-205
• Considerable deformation or corrosion is
developed.
• A faulty end socket is used.
Maintenance Every 250 Hours
Greasing Machine Units
CAUTION:
• Grease type varies with greasing points.
Failure to grease properly may cause the
machine to shorten its useful life. See the
following table for grease types.
• Greasing a new machine is required once
every 10 hours until the machine attains the
first 100 hours of operation. After that
period grease as required.
• Use proper grease specified below according to
the greasing points.
No.
Greasing point
Grease
type
1
Greasing of the
boom mounting pin
1 place
Lithium
grease
2
Greasing of the
hook block
1 place
3
Greasing of the
winch wire rope
1 piece Rope oil
1. With the use of the grease gun, grease the
greasing points (No.1, 2) specified in the
above table through corresponding grease
plugs.
Fig. 5-206
2. Wipe off old grease squeezed out after
greasing.
3. Apply red rope grease to prevent wire rope
abrasion and rust formation.
With the rope surface cleaned, grease the
rope with a brush.
Fig. 5-207