Komatsu Galeo PC800-8 Shop Manual page 129

10 Structure, function and maintenance standard
Outline
• The pump unit is composed of 2 variable-capac-
ity swash plate-type piston pumps, VC valves,
EPC valves and self pressure reducing valves.
CE1 : Front EPC output pressure pick-up port
CE2 : Rear EPC output pressure pick-up port
CH1 : Front servo actuator pick-up port
CH2 : Rear servo actuator pick-up port
CP1 : Front pump discharge pressure pick-up port
CP2 : Rear pump discharge pressure pick-up port
CP3 : Fan pump discharge pressure pick-up port
CPR: Pilot basic pressure pick-up port
CS1 : Front control pressure pick-up port
CS2 : Rear control pressure pick-up port
P1 : Front discharge port
P2 : Rear discharge port
P3 : Fan pump discharge port
P4 : Gear pump discharge port
PF : Self pressure reducing valve basic pressure port
PR2 : Pilot basic pressure output port (preceding the inline filter attached to the machine)
PR3 : Pilot basic pressure input port (succeeding to the inline filter attached to the machine)
PR5 : Pilot basic pressure pick-up port
PR8 : Pilot basic pressure output port (to fan EPC)
PR9 : Pilot basic pressure output port (to pilot valve)
S1 : Main pump suction port
S3 : Fan pump suction port
S4 : Gear pump suction port
T1 : Drain port
T2 : Drain plug
T3 : Drain plug
T4 : Drain plug
T5 : Drain plug
T6 : Air bleeder
T7 : Drain plug
T8 : Drain plug
T9 : Drain plug
T10 : Drain plug
T11 : Drain plug
T16 : Drain port
T17 : Drain plug
T18 : Air bleeder
1. Front pump
2. Rear pump
3. VC valve
4. EPC valve
5. Self pressure reducing valve
6. Filter
7. Cooling fan pump
8. PTO lubrication pump
PC800, 850-8
SEN00383-03
7