TM 5-3805-280-24-2
Hydraulic System
Bottom
1--Left Control Valve--
39--To Bucket Cylinder
49--Swing Left Pilot From
54--Left Propel Forward
5-Spool
Head End--Bucket
Left Pilot Controller
Pilot From Propel Pilot
2--Right Control Valve--
Curl
50--Bucket Dump Pilot
Controller
4-Spool
41--To Boom Cylinder Rod
From Right Pilot
55--To Hydraulic Tank--
13--Return From Bucket
End--Boom Down
Controller
Return From Rear
Flow Control Valve To
42--Bucket Flow Control
51--Boom Up Pilot From
Pump Control Valve
Solenoid Valve
Valve Front Top Port
Right Pilot
Manifold
To Right Side Boom
Controller--SAE
17--Arm In Pilot To Bucket
Up Pilot Cap
Pattern
Flow Control Valve--
47--Arm II To Arm I Pilot--
52--Boom II To Boom I
Front Bottom Port
Arm Out
Pilot--Boom Up
37--Right Propel Reverse
48--Arm Out Pilot From
53--Right Propel Forward
To Rotary Manifold
Left Pilot Controller--
Pilot From Propel Pilot
Right Rear Port
SAE Pattern
Controller
3. Disconnect the lines (3--55). Install caps and plugs.
Disconnect wiring harness connectors from propel
CAUTION: To avoid injury from escaping
33
pressure switch, dig pressure switch, and the four
3360
fluid under pressure, stop engine, and
proportional solenoid valves.
90
relieve the pressure in the system before
disconnecting hydraulic or other lines.
Tighten all connections before applying
pressure.
Continued on next page
TX,33,UU4002
1921SEP986/8
21-125
