Lull 6K Service Manual - Manual (Page 172)

Supply, Pressure, and Return Hydraulics
5-28 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
Removal and Installation
Reservoir Breather 1. Loosen and remove breather, using tool on hex portion of breather.
2. Replace breather per the maintenance schedule found on the machine
or if damaged.
3. Install breather on tank and tighten as necessary.
CAUTION: To avoid contamination of the hydraulic system, do not use
thread sealant or Teflon tape.
CAUTION: To avoid the possibility of the hydraulic system being
contaminated, do not fill the reservoir through the breather
opening.
Hydraulic Pressure Filter
Description
Fig. 5-19: Hydraulic Pressure Filter – Control Manifold Hydraulics
The hydraulic pressure filter is located on the mounting bracket for the
pressure filter and accumulator which is attached to the valve plate. While
Fig. 5-19 illustrates the hydraulic pressure filter for models that use control
manifold hydraulics, the filter is located in the same general area for
models that use mid-inlet hydraulics (see Fig. 5-21). The function of the
pressure filter is to remove contaminants from the oil traveling to the
joystick controls.
K
1101