Reference
Only
BOOM
999 SERVICE/MAINTENANCE MANUAL
4-10
Published 05-16-17, Control # 233-03
Gantry Limit Switch
The crane has a limit switch (
) which alerts the
operator when the gantry is raised to its maximum angle.
When the gantry is less than fully raised, the limit switch is
open. When the gantry is fully raised, the actuator closes the
limit switch.
Check limit switch for proper operation each time crane is
assembled.
Adjustment
The gantry limit switch was set at the factory and should not
require periodic adjustment. However, it will need adjustment
whenever parts are replaced.
1.
Travel crane onto firm, level surface.
2.
Make sure mast is raised.
3.
Select Setup mode and confirm.
4.
Using gantry switch, completely raise gantry until
hydraulic cylinders are fully extended.
5.
Loosen mounting bolts securing limit switch to frame.
6.
Slide switch forward until actuator just “clicks” limit
switch closed.
7.
Hold switch in place and tighten limit switch mounting
bolts.
8.
Test switch for proper operation by lowering and then
raising gantry.
FIGURE 4-7
P318
Limit
Switch
Gantry
Summary of Contents for 999
Page 1: ...R e f e r e n c e O n l y Service Maintenance Manual Manitowoc 999 ...
Page 2: ...R e f e r e n c e O n l y ...
Page 4: ...R e f e r e n c e O n l y THE ORIGINAL LANGUAGE OF THIS PUBLICATION IS ENGLISH ...
Page 297: ...R e f e r e n c e O n l y ...
Page 298: ...R e f e r e n c e O n l y ...