Lull 1044C-54 Series II Service Manual - Manual (Page 104)

Supply, Pressure, and Return Hydraulics
5-22 31200079
The return filter pressure gauge is located on the side of the return filter
housing.
The gauge indicates hydraulic fluid pressure entering the return filter
element. As contamination accumulates in the filter element, pressure
rises.
The acceptable operating pressure range is 0–15 psi and is indicated by
needle
(1) positioned in green arc (2). Pressures above 15 psi, orange arc
(3) and red arc (4), indicate that the return filter element must be serviced.
Replacing Return Filter Element
Fig. 5-14: Filter Housing Cover
Disassembly, Return Filter Element
(Ref. Fig. 5-14) The following procedure describes removal of the return
filter element.
1. Follow preparation procedures as outlined in Section 3 of this manual.
Be sure to follow the guidelines in this section detailed under “General
Hydraulic Maintenance Practices” on page 5-3.
# Description
1 Return Filter Housing
2 Flange Nut
3 Filter Housing Cover
# Description
4 O-Ring
5 Spring
6 Hydraulic Filter Element
K
1095
1
2
3
4
5
6