Lull 644B Parts Manual User Manual
Page 435
TABLE OF CONTENTS
Section 6 — Pump, Suction - Return and Valve Plate
Components
Control Manifold System
Pump, Suction - Return Hydraulic Circuit . . . . . . . . . . . . . . . . . . . . . . . . 6.1.1
Valve Plate Components Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.2.1
6-Port Circuit Selector Valve Assembly. . . . . . . . . . . . . . . . . . . . . . . . . .6.3.1
Frame Tilt Lockout Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.4.1
Hydraulic (Boom) Control Valve Assembly, 2-Spool . . . . . . . . . . . . . . . 6.5.1
Relief Valve Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.6.1
Hydraulic Control Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.7.1
Valve Section Assembly - Transfer/Auxiliary/Frame Tilt . . . . . . . . . . . . . 6.8.1
Valve Section Assembly - Carriage Fork Tilt. . . . . . . . . . . . . . . . . . . . . . 6.9.1
Control Manifold Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.10.1
Pump Unloader Hydraulic Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.11.1
Pump Unloader Valve Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.12.1
Mid Inlet System
Pump, Suction - Return Hydraulic Circuit . . . . . . . . . . . . . . . . . . . . . . . 6.15.1
Valve Plate Components Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.16.1
6-Port Circuit Selector Valve Assembly. . . . . . . . . . . . . . . . . . . . . . . . .6.17.1
Pump-Valve Sub Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.18.1
Hydraulic Control Valve Assembly - Mid Inlet . . . . . . . . . . . . . . . . . . . . 6.19.1
Valve Section Assembly - Boom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.1
Valve Section Assembly - Transfer/ Auxiliary/ Frame Tilt/ Unloader. . 6.21.1
Valve Section Assembly - Carriage Fork Tilt. . . . . . . . . . . . . . . . . . . . 6.22.1
Relief Valve Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.23.1
Relief Valve Assembly - Mid Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.24.1
Common Components
Hydraulic Return Line Filter Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 6.27.1
Pressure Filter Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.28.1