Service Manual User guide
Table Of Contents
- 10709790_B_644B,6K,844C,8K,1044C,10K_Lull_Service_Mnl
- Quick Reference
- Revision Record
- Table Of Contents
- List Of Figures
- List Of Tables
- Section 1 Safety
- Section 2 Identification & Specifications
- Section 3 General Maintenance
- Section 4 Reference Diagrams
- Section 5 Supply, Pressure & Return Hydraulics
- Section 6 Boom & Transfer
- Section 7 Frame Tilt & Oscillation
- Section 8 Transmission
- Section 9 Brakes
- Section 10 Outriggers

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.
K1100
psi
0
5
10
15
20
25
30
psi
K1009
1
2
3
4