Manitowoc Grove RT9130E-2 Service And Maintenance Manual page 229

RT9130E-2 SERVICE MANUAL
16. If desired, lessen the weight on the counterweight by
removing the two heavy counterweight weldments (2)
(Figure 5-13). To remove the weldments, attach an
adequate lifting device with slings attached to the lifting
lugs. Free the weldments from the counterweight by
removing the pins. Using the lifting device, remove the
weldments.
Installation
1. Position the crane on a firm level surface.
2. Fully extend and set the outriggers. Level the crane.
WARNING
Assemble the standard removable counterweight (1)
( F i g u r e 5 -1 3 ) a n d a u x i l i a r y h o i s t s t r u c t u r e ( 7 )
(Figure 5-14) on the ground or on a suitable transport
vehicle. Do not attempt to assemble on the counterweight
s ta n d . T h e a u x i l i a r y h o i s t s t r u c t u r e m a y h i t t h e
counterweight and knock it off the stand.
Assemble the heavy removable counterweight (2)
( F i g u r e 5 -1 3 ) a n d a u x i l i a r y h o i s t s t r u c t u r e ( 7 )
(Figure 5-14) on the ground or on a suitable transport
vehicle. Do not attempt to assemble on the counterweight
stand (1) (Figure 5-12). The auxiliary hoist structure (7)
(Figure 5-14) may hit the counterweight and knock it off
the stand.
The heavy removable counterweight assembly (2)
( F i gu r e 5 -13 ) m us t be i ns ta ll ed w i th b ot h he av y
counterweights. Using only one heavy counterweight may
cause the crane to become unstable.
NOTE: Step number 3 applies to the heavy removable
counterweight (2) (Figure 5-13).
3. Attach an adequate lifting device with slings to each
heavy counterweight weldment's lifting lugs. Using the
lifting device, carefully
counterweight weldments (2) (Figure 5-13) in place on
the counterweight auxiliary
(Figure 5-14). Pin the counterweight weldments in place
with the pins.
4. Using an adequate lifting device with slings attached to
the auxiliary hoist structure (7) (Figure 5-14), carefully
place the auxiliary hoist structure (7) (Figure 5-14) onto
the counterweight (1) (Figure 5-13).
5. Secure the counterweight (1) (Figure 5-13) to the
counterweight removal cylinders (5) (Figure 5-13) with
the cylinder to counterweight pins (9) (Figure 5-13) and
hitch pins (8) (Figure 5-13). Secure the counterweight
(1) (Figure 5-13) to the auxiliary hoist structure (7)
Grove
install the two heavy
hoist structure (7)
Published 11-22-2016, Control # 345-12
HOIST AND COUNTERWEIGHT
(Figure 5-14) with the counterweight to hoist structure
pins (12) (Figure 5-13) and hitch pins (11) (Figure 5-13).
WARNING
The main boom must not be lowered below horizontal
while swinging over the front while the counterweight
supports are installed.
6. Install the counterweight stands (1) (Figure 5-12) on the
front of the carrier.
7. Using an adequate lifting device with slings, carefully
transfer the auxiliary hoist and counterweight to the
counterweight stands.
WARNING
The main boom must not be elevated above horizontal
while swinging into the auxiliary hoist mounting structure.
8. Swing the superstructure over the rear and engage the
swing lock pin.
9. Connect the counterweight removal cylinder hydraulic
lines disconnected and tagged earlier.
10. Remove the hitch pins (8) (Figure 5-13) and the
counterweight to hoist structure pins (9) (Figure 5-13) to
free the auxiliary hoist structure (7) (Figure 5-13) from
the counterweight (1) (Figure 5-13).
11. Using the counterweight levers (6) (Figure 5-14), fully
extend the counterweight
(Figure 5-13) and carefully raise the auxiliary hoist
structure (7) (Figure 5-14) to meet the mating plates on
the turntable.
12. Use the pin control lever (6) (Figure 5-14) to extend the
pins on the rod ends of the pin removal cylinder (5)
(Figure 5-14) and pin the auxiliary hoist structure (7)
(Figure 5-14) to the turntable.
13. Install the detent pins (4) (Figure 5-14) to secure the
pins on the rod ends of the pin removal cylinder (2)
(Figure 5-14) to keep the auxiliary hoist structure (7)
(Figure 5-14) secured.
14. Retract the counterweight removal cylinders (5)
(Figure 5-13) and carefully raise the counterweight (1)
(Figure 5-13) to its installed (working) position.
15. Secure the counterweight (1) (Figure 5-13) to the
auxiliary hoist structure (7) (Figure 5-14) with the
counterweight-to-hoist structure pins (12) (Figure 5-13).
removal cylinders (5)
5-25
5