8-13
RT770E
UNDERCARRIAGE
8
Published 11/26/2014, Control # 447-05
GROVE
Axle Oscillation Lockout Cylinders
Description
Two 12.7 cm (5.0 in) hydraulic lockout cylinders are installed
on the rear axle, one left side and one right side. The base
end of each cylinder is attached to each side of the carrier
frame and the rod ends are attached to each side of the
cradle (fifth wheel). The lockout cylinders are connected
hydraulically so that hydraulic oil flows from the rod side of
the left cylinder to the barrel side of the right cylinder and
from the rod side of the right cylinder to the barrel side of the
left cylinder.
Each cylinder weighs approximately 38.8 kg (85.5 lb).
Maintenance
NOTE:
For disassembly and assembly procedures, refer
to
Removal
1.
Raise the crane up on outriggers.
2.
Rotate the turntable more than ±2 degrees in either
direction from directly over the front to lock out the
oscillation cylinders.
3.
Remove the wheel and tire assembly from the axle.
4.
Tag and disconnect both hydraulic hoses from the ports
on the cylinder. Cap or plug both hoses and the ports on
the cylinder.
5.
At the rod end of the cylinder, remove one of the cotter
pins securing the retaining pin to the cradle attach fitting.
6.
Tap out the retaining pin, freeing the rod end from the
cradle.
7.
At the barrel end of the cylinder, remove one of the cotter
pins securing the retaining pin to the frame attach fitting.
8.
Tap out the retaining pin and remove the cylinder.
Installation
1.
Position the barrel end of the cylinder in the frame attach
fitting and tap in the retaining pin.
2.
Secure the retaining pin with the cotter pin.
3.
Align the rod end of the cylinder in the cradle attach
fitting and tap in the retaining pin.
4.
Secure the retaining pin with the cotter pin.
5.
Remove the caps or plugs from the two hydraulic hoses
and the cylinder ports and connect the hoses to the
appropriate cylinder ports as tagged during removal.
6.
Install the wheel and tire assembly on the axle. Tighten
the lug nuts. Refer to Wheels And Tires in this section.
7.
Lubricate both ends of the cylinder using the fittings
provided.
8.
Function test the axle oscillation system in accordance
with the Operator’s Manual to ensure proper operation.
Axle Oscillation Lockout Valve
Description
The axle oscillation lockout valve (also called the double
solenoid valve) is used in the rear axle oscillation lockout
circuit. The valve is mounted on the left rear face of the
carrier frame rear cross member forward of the rear axle. It
consists of a valve body and two normally-closed, two-way,
two-position solenoid valves. It keeps the lockout cylinders
from oscillating unless the turntable is centered forward.
For the CE Units with Dual Axis Controllers, the axle
oscillating lockout valve is replaced with four two way
solenoid operated poppet cartridge valves installed in the
ports of the lockout cylinders.
The angle encoder located in the top of the electrical slip ring
assembly sends a CAN bus message to the RCL. The RCL
converts the data in the message to a position angle of the
superstructure relative to the carrier (slew angle). If the slew
angle is ±2° of directly over the front, the RCL sends a CAN
bus message to the Crane Control System to allow axle
oscillation. When the Crane Control System receives this
message it switches ON a digital output thus energizing the
axle oscillation solenoids. If the angle is more than 2° left or
2° right of directly over the front, the Crane Control System
switches OFF the digital output thus de-energizing the axle
oscillation solenoids.
When the axle oscillation normally closed solenoid valves
are de-energized the lockout cylinders are isolated from
hydraulic oil supply. This keeps the cylinders from oscillating
(moving up and down to damp axle movement) because
hydraulic oil cannot leave the cylinders. Instead, the
cylinders remain full of hydraulic oil and more rigid.
When the axle oscillation solenoid valves are energized and
open, hydraulic oil is allowed in and out of the cylinders,
allowing them to oscillate.
Maintenance
NOTE:
Refer to
, page 2-1 for removal
and installation of the valve.
BRAKE SYSTEM
Description
The brake system includes all the components necessary for
the application of the service brakes and the parking brake.
Service Brakes
The service brakes are full power hydraulic brakes which are
hydraulically controlled and are used to apply the brake
assemblies on all four wheels. The system consists of the
Содержание Grove RT770E
Страница 3: ...Service Maintenance Manual Grove RT770E ...
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Страница 40: ...INTRODUCTION RT770E SERVICE MANUAL 1 26 Published 11 26 2014 Control 447 05 THIS PAGE BLANK ...
Страница 124: ...HYDRAULIC SYSTEM RT770E 2 84 Published 11 26 2014 Control 447 05 THIS PAGE BLANK ...
Страница 126: ...ELECTRICAL SYSTEM RT770E SERVICE MANUAL 3 2 Published 11 26 2014 Control 447 05 FIGURE 3 1 7983 ...
Страница 149: ...4 5 Published 11 26 2014 Control 447 05 RT770E SERVICE MANUAL BOOM 4 GROVE FIGURE 4 2 ...
Страница 150: ...BOOM RT770E SERVICE MANUAL 4 6 Published 11 26 2014 Control 447 05 FIGURE 4 2 continued ...
Страница 151: ...4 7 Published 11 26 2014 Control 447 05 RT770E SERVICE MANUAL BOOM 4 GROVE FIGURE 4 2 continued ...
Страница 152: ...BOOM RT770E SERVICE MANUAL 4 8 Published 11 26 2014 Control 447 05 FIGURE 4 2 continued ...
Страница 153: ...4 9 Published 11 26 2014 Control 447 05 RT770E SERVICE MANUAL BOOM 4 GROVE FIGURE 4 2 continued ...
Страница 154: ...BOOM RT770E SERVICE MANUAL 4 10 Published 11 26 2014 Control 447 05 FIGURE 4 2 continued ...
Страница 224: ...5 24 Published 11 26 2014 Control 447 05 HOIST AND COUNTERWEIGHT RT770E This Page Blank ...
Страница 276: ...POWER TRAIN RT770E 7 30 Published 11 26 2014 Control 447 05 THIS PAGE BLANK ...
Страница 300: ...UNDERCARRIAGE RT770E 8 24 Published 11 26 2014 Control 447 05 FIGURE 8 28 ...
Страница 321: ...9 9 RT770E LUBRICATION 9 Published 11 26 2014 Control 447 05 GROVE 7114 17 1 4 2 7114 20 7114 10 3 FIGURE 9 1 ...
Страница 323: ...9 11 RT770E LUBRICATION 9 Published 11 26 2014 Control 447 05 GROVE 7114 17 11 12 7114 9 FIGURE 9 2 8130 1 ...
Страница 329: ...9 17 RT770E LUBRICATION 9 Published 11 26 2014 Control 447 05 GROVE 42 7114 25 7114 24 41a 7649 21 FIGURE 9 5 40 8130 2 ...
Страница 331: ...9 19 RT770E LUBRICATION 9 Published 11 26 2014 Control 447 05 GROVE FIGURE 9 6 8130 1 51 52 50 ...
Страница 336: ...LUBRICATION RT770E 9 24 Published 11 26 2014 Control 447 05 72 73 74 73 74 72 73 74 73 74 FIGURE 9 8 8133 ...
Страница 343: ...9 31 RT770E LUBRICATION 9 Published 11 26 2014 Control 447 05 GROVE 84 7114 30 FIGURE 9 11 85 7115 33 8130 2 ...
Страница 347: ...9 35 RT770E LUBRICATION 9 Published 11 26 2014 Control 447 05 GROVE 7649 22 101 100 FIGURE 9 13 8130 2 ...
Страница 348: ...LUBRICATION RT770E 9 36 Published 11 26 2014 Control 447 05 FIGURE 9 14 102 8130 2 ...
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