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IV-65
HYDRAULIC UNITS
CONTROL VALVE (SUB)
T7D901
4
P
5
3
T7D902
6
3
P
7
2
T7D903
8
10
9
T7D904
4
P
5
C
3
OPERATION
When the solenoid A is not electrified
The port P and the circuit of the port 3 are connected
through the spool (4).
The hydraulic oil from the port P flows into the port
3, while the port P and the circuit (5) of the port 1
are shut off.
The port P and the circuit of the port 2 are shut off
by the poppet (6).
The hydraulic oil from the port 2 pushes up the
plunger (7), flows into the circuit of the port 1, and
enters together with the oil from the port 1 into port
T.
When the solenoid A is electrified
A magnetic field is generated around the coil that
causes the push rod to be pulled downward, pushing
the spool (8) downward. Then the hydraulic oil from
the port P flows through the passages (9) and (10)
and enters the chamber C.
The hydraulic oil entering into the chamber C moves
the spool (4) downward to shut off the ports P and 3.
This connects the port P and the passage (5), allow-
ing the oil flow from the port P to port 1.
Summary of Contents for TL150
Page 1: ...TL150 Track Loader BOOK No CT7E901 WORKSHOP MANUAL Serial No 21500004...
Page 4: ...0 4...
Page 5: ...I 1 I GENERAL...
Page 18: ...I 14 GENERAL...
Page 19: ...II 1 II SPECIFICATIONS...
Page 44: ...III 1 III MACHINE CONFIGURATION...
Page 94: ...III 51 MACHINE CONFIGURATION ELECTRICAL SYSTEM ELECTRICAL SYSTEM ELECTRICAL WIRING DIAGRAM...
Page 122: ...III 79...
Page 146: ...MACHINE CONFIGURATION III 103...
Page 147: ...IV 1 IV HYDRAULIC UNITS...
Page 152: ...IV 6 HYDRAULIC UNITS HST PUMP 1 Plug 2 Plug 3 Plug 4 Screw 5 Seal Nut 6 Plug Pump Assembly 4 4...
Page 189: ...IV 43 HYDRAULIC UNITS GEAR PUMP INSPECTION AND ADJUSTMENT IV 36 38 TROUBLESHOOTING IV 39...
Page 230: ...IV 84 HYDRAULIC UNITS PILOT VALVE INSPECTION AND ADJUSTMENT IV 79 TROUBLESHOOTING IV 80...
Page 261: ...IV 115 HYDRAULIC UNITS TRAVEL MOTOR DISASSEMBLY AND ASSEMBLY Special tools...
Page 263: ...IV 117 HYDRAULIC UNITS TRAVEL MOTOR...
Page 282: ...IV 136 HYDRAULIC UNITS TRAVEL MOTOR...
Page 283: ...V 1 V TROUBLESHOOTING...