4. RELIEF VALVE (Reference)
1)GENERAL DESCRIPTION
This valve regulates the maximum pressure in
the whole hydraulic circuit.The regulated
pressure can be set with the adjust screw.
Fig. 9-9 Relief valve in PTO solenoid V/V
2) PRECAUTIONS FOR DISASSEMBLY
AND REASSEMBLY
(1)Tightening torque of lock nut (
9)5.0
∼
6.0
㎏
f·
㎠
(36.2
∼
43.4 ft.lbs)
(2)Install seat(2)and then tap ball(3)(5/16)
lightly so as to provide tight seating.
(3)Wrap the valve threads with sealing tape
and tighten the valve up to a specified
torque of
5-6Kgf.m(36-43 ft.lbs)
(4)Before disassembly, the current
screwing-in depth of the adjust screw
should be written down or memorized for
later reference.
3) MEASUREMENT OF THE RELIEF
PRESSURE
(1)3 POINT TO TEST RELIEF PRESSURE
Fig. 9-9 Relief valve in PTO solenoid V/V
Fig 9-10 relief valve circuit.
①
Remove the plug in the delivery pipe on
the right-hand side of the transmission
case and install a compression gauge to
measure the pressure.
Keep the engine speed at
2700 rpm
and
shift the position control lever at the
highest position.
②
Control valve coupler.
③
Remove the plug in the hyd. pump flange
and engage the pressure gauge and
measure it.
Measurement the Pressure must be done 3
times and should be set within specified
pressure.
Specified relief pressure
145
±
5
㎏
f·
㎠
9-9
Summary of Contents for T233 HST
Page 14: ...1 11...
Page 15: ...1 12...
Page 22: ...SECTION 3 GEAR TRAIN DIAGRAMS FIG 1 3 GEAR TRAIN DIAGRAM 1 19...
Page 33: ...SECTION 2 OPERATION CHART FOR DISASSEMBLY AND REASSEMBLY BY MAJOR BLOCKS 2 4...
Page 60: ...3 HST main pump case 4 5...
Page 64: ...6 Hydrostatic system schematic 4 8...
Page 100: ...3 Rear transmission case 5 15 Fig 5 23...
Page 121: ...Power Train Diagram Fig 5 60 5 36...
Page 210: ...SECTION 6 WIRING DIAGRAM 10 12...
