5-11
TMS800E SERVICE MANUAL HOIST AND COUNTERWEIGHT
Published 01-29-2014, Control # 496-00
HOIST CONTROL VALVES
Description
NOTE: For more detailed information, refer to Valves,
page 2-22.
Hoist Motor Control Valve
The hoist motor control valve is mounted on the hoist and is
designed to provide an even flow of oil to the hoist motors in
both directions.
Hoist Directional Control Valve
The hoist directional control valve is used to control the
operation of the hoist. It is mounted on the right side of the
turntable.
COUNTERWEIGHT
Description
The removable counterweight (see Figure 5-5) is pinned to
the rear of the turntable under the hoist mounting. The
counterweight consists of:
• A 5443 kg (12,000 lb) removable counterweight
consisting of three slabs, each weighing 1814 kg (4000
lb).
• A 8165 kg (18,000 lb) removable counterweight
consisting of three slabs each weighing 1814 kg (4000
lb) and one slab weighing 2721 kg (6000 lb).
• An optional 10,885 kg (24,000 lb) removable
counterweight consists of two 1,360 kg (3000 lb) “wing
weights” that hang on the existing 8,165 kg (18,000 lb)
counterweight stack.
NOTE: This extra counterweight is not roadable due to the
overall width of the machine when installed, but you
can move around the jobsite with the full
counterweight installed.
The following procedures are applicable for
removal and installation of any or all pieces (see
Figure 5-5).
The counterweight contains lugs for attachment to the
removal cylinders and lugs to pin it under the hoist mounting.
The additional slabs pin the structure to each other. The
counterweights can be pinned to the carrier deck and are
transferred between the turntable and the carrier deck by two
hydraulic removal cylinders. The cylinders are controlled
from a valve assembly located under the hoist mounting. The
valve contains an inlet section, an outlet section with relief
valve, and a working section for each cylinder. The valve is
electrically controlled by a control panel on the right side of
the turntable.
Maintenance
Cylinders
Removal
1. Set the counterweight on the carrier deck.
2. Tag and disconnect the hydraulic lines from the cylinder.
Cap or plug all openings.
NOTE: The cylinder weighs approximately 42 kg (92 lb).
3. Remove the four bolts and lockwashers securing the
cylinder to the mounting plate. Remove the cylinder and
spacer.
Installation
1. Position the cylinder and spacer on the mounting plate
and secure with four bolts and lockwashers. Tighten the
bolts, refer to Fasteners and Torque Values, page 1-13.
2. Connect the hydraulic lines to the cylinder as marked
during removal.
Jackscrews
There are four jackscrews with jam nuts under the mounting
structure and six on the slabs. With the counterweight
properly pinned to the mounting structure (turntable) adjust
the jackscrews to level the counterweight pieces to eliminate
any relative movement between each piece and the
mounting structure (turntable). Secure the adjustment with
the jam nuts.
Mounting the Counterweight
1. Position the crane on a firm level surface. Fully extend
and set the outriggers.
2. Rotate and align the rear of the superstructure above the
removable counterweight stowed on the carrier deck.
Engaging the pin type turntable lock will aid alignment.
3. Using the counterweight removal control panel located
on the right side of the turntable, lower the
counterweight cylinders. Pin the cylinders to the
counterweight using the attach pins in the cylinders.
Insert the retaining pins in the attach pins.
4. Push in, turn, and remove the long attach pins from the
counterweight and carrier frame lugs.
5. Using the control panel, raise the counterweight up
under the superstructure frame.
NOTE: It may be necessary to jog the counterweight with
the removal control panel to install the upper attach
pins.
6. Remove the upper attach pins from the stowage
bushings and install them into the upper counterweight
and superstructure frame lugs.
Reference Only
To Next Page
Loading...
