HYDRAULIC SYSTEM TMS700E SERVICE MANUAL
2-2 Published 01-29-2015, Control # 512-01
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-60
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-60
Steer Cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-63
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-63
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-64
Outrigger Extension Cylinder . . . . . . . . . . . . . . . 2-67
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-67
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-67
Outrigger Jack Cylinder . . . . . . . . . . . . . . . . . . . . 2-70
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-70
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-70
Center Front Jack Cylinder . . . . . . . . . . . . . . . . . . 2-74
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-74
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-74
Counterweight Removal Cylinder. . . . . . . . . . . . . 2-78
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-78
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-78
DESCRIPTION
This section describes the hydraulic system, the
components which make up the hydraulic system, and the
components dependent upon the hydraulic system for their
operation. This includes descriptions of the supply pressure
and return hydraulic circuit, hydraulic pumps, all hydraulic
valves, and all hydraulic cylinders. Detailed descriptions and
operation of individual hydraulic circuits are discussed within
their individual sections as applicable. A complete hydraulic
system schematic showing all options is at the back of this
manual and a figure containing ANSI graphical symbols
provides hydraulic symbol information in Figure 2-1.
MAINTENANCE
Hydraulic Oil Recommendations
For the hydraulic oil specifications, refer to Lubrication, page
9-1.
Draining and Flushing
If a component has been changed because of a failure that
might allow metal or abrasive particles to enter the system,
all systems must be thoroughly checked, drained, and
flushed.
1. Remove the reservoir drain plug. Allow about three
minutes after hydraulic oil stops flowing from the drain
port for the side walls to drain.
2. Clean and install the reservoir plug and fill the reservoir
with a 50/50 mixture of fuel oil and clean hydraulic oil.
3. Cycle the crane through all functions several times.
Then return the crane to its stowed position and turn the
front wheels to the extreme left. Shut down the engine.
4. Remove the reservoir drain plug and drain the reservoir.
Clean and install the drain plug and fill the reservoir with
clean hydraulic oil.
NOTE: Draining the various components will be aided by
connecting a drain line in place of the disconnected
return line.
5. Disconnect the return line from the lift cylinder and raise
the boom to maximum elevation.
6. Connect the cylinder return line and lower the boom to
its stowed position. Replenish the reservoir hydraulic oil
level as required.
7. Disconnect the return line from an outrigger extension
cylinder and fully extend the outrigger.
8. Connect the outrigger return line and retract the
outrigger. Replenish the reservoir hydraulic oil level as
necessary.
9. Repeat Steps 7 and 8 for the remaining outriggers.
10. Disconnect the return lines from a pair of outrigger
cylinders and the center front jack cylinder and activate
the cylinders to their maximum down positions.
11. Connect the return lines and raise the outrigger jack
cylinders and the center front jack cylinder to the stowed
position. Replenish the reservoir hydraulic oil level as
necessary.
12. Repeat Steps 10 and 11 for the remaining two outrigger
cylinders.
13. Disconnect the return line from the telescope cylinder
and fully extend the boom.
CAUTION
Hydraulic oil supply lines must be connected to the
cylinders when flushing the system.
CAUTION
When draining the outrigger cylinders, always operate
either both front or both rear cylinders together to prevent
twisting the crane.
Reference Only
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