TM 5-3810-307-24-1-1
MAINTENANCE
HYDRAULIC OIL RECOMMENDATIONS.
8.
Connect the outrigger return line and retract
the outrigger. Replenish the reservoir oil level as
For the hydraulic oil specifications, refer to Chapter
necessary.
9.
Repeats steps 7 and 8 for the remaining
DRAINING AND FLUSHING.
outriggers.
If a component has been changed because of a
CAUTION
failure that might allow metal or abrasive particles to
When draining the jack cylinders, always
enter the system, all systems must be thoroughly
operate either both front or both rear
checked, drained, and flushed.
cylinders together to prevent twisting the
crane.
1.
Remove the reservoir drain plug.
Allow
approximately three minutes, after oil stops flowing
10. Disconnect the return lines from a pair of
from the drain port, for the side walls to drain.
outrigger jack cylinders and activate the cylinders to
their maximum down position.
2.
Clean and install the reservoir plug and fill the
reservoir with a 50-50 mixture of fuel oil and clean
11. Connect the return lines and raise the jack
hydraulic oil.
cylinders to the stowed position. Replenish the oil
level as necessary.
3.
Cycle the crane through all functions several
times; then return the crane to its stowed position
12. Repeat steps 10 and 11 for the remaining two
and turn the front and rear wheels to the extreme left.
outrigger jack cylinders.
Shut down the engine.
13. Disconnect the return line from the telescope
4.
Remove the reservoir drain plug and drain the
cylinder and fully extend the boom.
reservoir. Clean and install the drain plug and fill the
reservoir with clean oil.
14. Connect the return line and retract the boom.
Replenish the reservoir oil level as necessary.
CAUTION
Oil supply lines must be connected to
15. Disconnect the return lines from both front
the cylinders when flushing the system.
steer cylinders and turn the front wheels to the
extreme right.
NOTE
16. Connect the return lines and turn the front
Draining the various components will be
wheels to the extreme left and then back to center.
facilitated by connecting a drain line in
Replenish the reservoir oil level as necessary.
place of the disconnected return line.
17. Repeat steps 15 and 16 for the rear steering
5.
Disconnect the return line from the lift cylinder
cylinders.
and raise the boom to maximum elevation.
CAUTION
6.
Connect the cylinder return line and lower the
When oils are changed or added, ensure
boom to its stowed position. Replenish the reservoir
that oils of different manufacturers are of
oil level as required.
the same specifications. However, dis-
coloration (milkiness) may occur.
7.
Disconnect the return line from an outrigger
extension cylinder and fully extend the outrigger.
2-8-11
