Manitowoc Published 11-20-19, Control # 234-19 4-135
MLC300 OPERATOR MANUAL SETUP AND INSTALLATION
Remove First Crawler
See Figure 4-90 for the following procedure.
NOTE The first crawler (1) can be lifted at the specified
radius from either side of the carbody. 360° swing is
permitted as long as the second crawler (2) is on the
ground.
1. At the inboard lifting link (3, View B):
a. Remove the hitch pin (4) from the bottom holes (5)
in the bracket.
b. Lift the inboard link (3).
c. Reinstall the hitch pin (4) in the TOP holes in the
bracket.
d. Lower the link (3) onto the hitch pin (4).
The inboard lifting link will interfere with crawler pin
removal if this step is not performed.
2. Connect three legs of the lifting slings (6, View A) to the
lifting links (3) on the first crawler with the shackles (7).
3. Using the remote control, extend the jacking cylinders
next to the first crawler (1, View C) until the first stage of
each cylinder is fully extended.
Do not extend the cylinders to the point that the
small diameter rods (second stage) are exposed.
4. Using the remote control, fully retract the jacking
cylinders next to the second crawler (2, View C).
The opposite side crawler must be on the ground.
5. Boom up and down as needed to center the self-erect
cylinder (8, View C) over the first crawler (1).
6. Tilt the operator cab up so it is not damaged during
crawler removal.
7. Remove the collars (9, View D) from both crawler pins
(11).
8. Temporarily store the collars on the storage lugs (12,
View D).
9. Hoist with the self-erect cylinder until the lifting slings are
taut.
10. Using the remote control, disengage the corresponding
crawler pins (11).
11. Hoist with the self-erect cylinder until the top connecting
holes (13, View D) in the crawler frame disengage the
top connecting pins (14) on the carbody.
12. Boom down until the crawler is clear of the carbody.
Do not exceed the specified radius.
13. The crawler will hang at an angle as shown.
14. Position the trailer (1, View E) on the desired side of the
crane at the specified radius.
15. Lower the crawler onto the trailer until the lifting slings
are slack.
16. Disconnect the shackles and lifting slings from the
crawler.
17. Secure the crawler to trailer with tie-downs.
18. If necessary remove the crawler ladder from the crawler
and secure it to the trailer. Reverse the installation steps
(see Install Crawler Ladders on page 4-51
).
19. Remove the trailer from the area.
20. Using the remote control, engage the crawler pins (11,
View D).
21. Remove the collars (9, View D) from the storage lugs
(12) and install them on the crawlers pins (11) with the
hitch pins (10).
22. Proceed to remove the second crawler.
DANGER
Tipping Hazard!
Prevent the crane from tipping over when removing the
first crawler:
• Do not attempt to remove the first crawler until the
second crawler (2, on opposite side) is lowered to the
ground, if raised.
• Do not exceed the radius specified in Figure 4-90
,
View E when lifting the first crawler.
• Make sure the small diameter rods of the jacking
cylinders are fully retracted before handling the
crawler, otherwise the jacking cylinders will be
overloaded and possibly collapse.
CAUTION
Parts Damage!
Do not attempt to lift the crawler off the crane by booming
up. Damage to the self-erect cylinder can occur.
Avoid hitting the carbody jacks with the crawler.
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