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IV-66
HYDRAULIC UNITS
CONTROL VALVE (SUB)
The hydraulic oil from the port 1 flows through the
bore on the side panel of the spool (11) and through
the wire clearance into the chamber D, which consists
of the spool (11) and piston (12). When the pressure
in the chamber D becomes higher than the set pres-
sure, the spool (11) moves downward, releasing the
oil from the port 1 to port 2, keeping the pressure in
the port 1 at the set pressure.
The hydraulic oil in the port 2 pushes up the poppet
(5) and flows into the port 3.
When the solenoid B is not electrified
The hydraulic oil from the port P is shut off by the
spool (13).
The port 1B is connected with the port T.
When the solenoid B is electrified
The magnetic field is generated around the coil that
causes the push rod to be pulled downward, push-
ing the spool (13) downward. Then the hydraulic oil
flows from the port P to port 1B, shutting off the
circuit to the port T.
T7D905
3
5
P
2
12
D
11
T7D906
13
1B
P
T7D907
13
1B
P
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...