HYDRAULIC SYSTEM - STRUCTURE AND OPERATING PRINCIPLE SAFETY FIRST
2.3.6. HYDRAULIC BLOCK CIRCUIT AND FUNCTION
GENERAL
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3) 2 ULQJ ERVV
ENGINE
3) 2 ULQJ ERVV
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3) 2 ULQJ ERVV
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TRANSMISSION TRANSMI SSION
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NJI FP
REAR HSTAXLE
% *HDU SXPS
TRANSMI HST
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Dealer Copy -- Not forSSION Resale
R69WB21B
•
If the hydraulic power should be used for the implement, replenish the transmission fluid as much as the cylinder of the implement requires.
REMARK •
Check the oil type and make sure that the oil is not contaminated before installing the implement.
DR72-W00
301 of 450
•
When no implement is installed, turn the (-) slot at the end surface of the spool to fix it horizontally.
11-17
FRONT STEERING AXLE SYSTEM
FRONT BRAKE AXLE
REAR BRAKE AXLE
REMARK
HYDRAULIC STEERING SYSTEM
IMPORTANT
2. Also, the hydraulic block is able to supply the hydraulic power for the external implement, such as a front rotor, like the external hydraulic valve (quick coupler). 3. External implement connection • Remove the plugs from the IN port (1) and OUT port (2) on the hydraulic block. • Install the fluid outlet adapter (PT 3/8") to the IN and OUT ports. • Connect the hydraulic hose to the OUT port adapter and the IN port of the implement control valve. • Connect the other hydraulic hose to the IN port adapter and the tank (return) port of the implement control valve. • Turn the (-) slot at the end surface of the spool (3) in order to be vertical in the arrowed direction.
HYDRAULIC ELECTRIC & DIAGNOSIS SYSTEM
1. The oil supplied from the secondary pump of the gear pump is drawn to the aux. hydraulic valve through the hydraulic block. The hydraulic valve has a relief valve which opens to return the hydraulic fluid to the transmission case if the pressure in the hydraulic line is excessively high (over 185 kgf/cm2, 18130 kPa, 2631 psi).
(1) IN PORT PLUG (2) OUT PORT PLUG (3) SPOOL (4) RELIEF VALVE
A/C AND INDEX HEATER
A: TO ATTACHED IMPLEMENT CONTROL VALVE IN PORT B: FROM ATTACHED IMPLEMENT CONTROL VALVE TANK PORT C: POSITION WHEN NO IMPLEMENT IS ATTACHED D: POSITION WHEN AN IMPLEMENT IS ATTACHED