Lull 6K Service Manual - Manual (Page 166)

Supply, Pressure, and Return Hydraulics
5-22 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
Hydraulic Return Filter
Description
Fig. 5-13: Hydraulic Return Filter
(Ref. Fig. 5-13) The hydraulic return filter assembly is located on the
hydraulic reservoir. Its function are to filter return hydraulic oil entering the
reservoir and provide a means to fill the reservoir.
Checking Filter Condition
Fig. 5-14: Return Filter Pressure Gauge
Note: Check indicator with engine at idle, after thirty minutes of operation.
K
1100
psi
0
5
10
15
20
25
30
psi
K
1009
1
2
3
4