TM 5-3805-280-24-1
Theory of Operation
9025
05
34
Right Rear
1--Left Control Valve
70--Auxiliary Valve
91--Speed Sensing
97--Right Control Valve to
(5-Spool)
71--Boom II Valve
Solenoid Valve
Arm I Power Passage
2--Right Control Valve
72--Arm I Valve
92--Arm Regenerative
Check Valves and
(4-Spool)
73--Swing Valve
Solenoid Valve
Restriction Orifice
57--System Relief Valve
85--Arm Regenerative
93--Flow Combiner Valve
98--Front Pump Control
and Power Boost
Valve
94--Bucket Flow Control
Valve
63--Solenoid Valve
86--Arm II to Arm I Neutral
Valve Pilot Valve A
99--Filter and Orifice for
Manifold
Passage Check Valve
and B, and Poppet
Pilot Pressure to Front
64--Arm II Valve
87--Boom Up Circuit Relief
Valve
Pump Control Valve
65--Boom I Valve and
Valve
95--Bucket Check Valve
105--Oil Cooler Bypass
Boom Regenerative
88--Bucket Dump Circuit
(Lift Check)
Valve
Valve
Relief Valve
96--Boom I Power and
66--Boom Reduced
89--Power Boost Solenoid
Neutral Passage
Leakage Valve
Valve
Check Valves (Lift
67--Bucket Valve
90--Propel Speed Change
Checks)
68--Right Propel Valve
Solenoid Valve
69--Left Propel Valve
Continued on next page
TX,05,GG2154 1920MAY983/4
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