Grove
Published 01-14-2021 Control # 707-01
4-45
TMS9000-2 SERVICE MANUAL
SUPERSTRUCTURE
4
Location of Vent Screws
Telescoping Status
The position numbers indicated below relate to the
illustrations in the Location of Vent Screws (Figure 4-32) in
this section.
Vent Screw Position No. 1
•
Screw off the manhole cover plate.
•
Extend telescopic section
I
approximately 2.0 m (6.5 ft)
so that the access to the manhole is free.
•
Fit the bleeder key through the manhole onto the vent
screw (1), (Figure 4-32) on the telescoping cylinder and
open with one or two turns.
•
Make sure nobody is in the manhole or is reaching into
the manhole.
•
Carefully move the control lever for telescoping in the
retract direction so that the pressure in the set of piston
rings increases and the air is pushed out through the
plastic hose.
•
Tighten the vent screw (1), (Figure 4-32).
•
Close the manhole again with the cover plate.
FIGURE 4-32
Position
Number
Vent For:
Access to Vent on Basic Section Via:
1
Set of Piston Rings
Manhole in Top of Base Section
2
Piston Chamber
Opening in Telescopic Section 5 Left-Hand Side
WARNING
Crushing Hazard!
Do not reach into the manhole until the boom has been
secured so that it cannot retract inadvertently. If you are
carrying out this operation with the help of someone else,
communicate with the person in the crane cab by means
of clear hand signals.
Fo
r
Reference
Only
