Published 3-30-2018, CTRL 636-05 6-3
CD15 OPERATOR MANUAL MAINTENANCE
Label Parts when Disassembling
When removing or disconnecting a group of wires or cables,
tag each one to ensure proper identification during re-
assembly.
When shims are removed, tie them together and identify
them as to location. Keep shims clean and flat until they are
reinstalled.
Hydraulic Oil Recommendations
For the hydraulic oil specifications, Reference the CD15
Service Manual.
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 hydraulic tank 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 hydraulic tank plug and fill the
hydraulic tank 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 and rear wheels to the extreme left. Shut down the
engine.
4. Remove the hydraulic tank drain plug and drain the
hydraulic tank. Clean and install the drain plug and fill
the hydraulic tank with clean hydraulic oil.
NOTE: Hydraulic oil supply lines must be connected to the
cylinders when flushing the system.
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 hydraulic tank
hydraulic oil level as required.
7. Disconnect the return line from an outrigger cylinder and
fully extend the outrigger.
8. Connect the outrigger return line and retract the
outrigger. Replenish the hydraulic tank oil level as
necessary.
9. Repeat Steps 7 and 8 for the remaining outriggers.
10. Disconnect the return line from the telescope cylinder
and fully extend the boom.
11. Connect the return line and retract the boom. Replenish
the hydraulic tank oil level as necessary.
12. Disconnect the return lines from steer cylinders and turn
the wheels to the extreme right.
13. Connect the return lines and turn the wheels to the
extreme left and then back to center. Replenish the
hydraulic tank oil level as necessary.
14. Raise the crane on outriggers.
15. Disconnect the return line from the main hoist motor and
fully hoist up the hoist.
16. Connect the return line to the main hoist motor and fully
hoist down the hoist, then hoist up again. Replenish the
hydraulic tank oil level as necessary.
17. Disconnect one of the lines from the swing motor and
drive the motor in the direction it will go.
18. Connect the line to the swing motor, then drive the swing
motor in the opposite direction until the boom is centered
and forward. Replenish the hydraulic tank oil level as
necessary.
When hydraulic oils are changed, recheck the hydraulic tank
oil level after brief system operation and add hydraulic oil as
required. Ensure the crane is level and in the travel mode of
operation when the hydraulic system is being filled. The
system must be filled with all cylinders retracted. Fill the
hydraulic tank to the full mark on the sight gauge. After the
hydraulic tank is filled, operate all circuits and recheck the
sight gauge. Add hydraulic oil as required.
Removing Air From the Hydraulic System
Air entering the hydraulic oil will normally be removed
automatically by passage of the hydraulic oil over the baffles
in the hydraulic tank. If a component has been replaced, the
hydraulic tank level is too low, or a leak develops in the
suction lines to the pumps, air can enter the system. If air
CAUTION
When draining the outrigger cylinders, always operate
either both front or both rear cylinders together to prevent
twisting the crane.
CAUTION
When hydraulic oils are changed or added, ensure that
hydraulic oils of different manufacturers are of the same
specifications, however, discoloration (milkiness) may
occur. Mixing incompatible hydraulic oils may result in
improper operation or damage to the machine.
To Next Page
Loading...
Need help?
General
