The Oil Makeup Operation on CIPI Undercarriage Arrangements which are Based on 330 Track Type Excavators
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| Illustration 1 | g01035304 |
Oil makeup operation (1) Motor rotary group (2) Left travel motor (3) Passage (4) Check valve (5) Line (6) Swivel (7) Line (8) Passage (9) Left travel control valve (10) Passage (11) Return passage | |
Return oil from the travel control valve is used as makeup oil to prevent a vacuum condition in the travel motor when operation is stopped.
The oil makeup operation is given with respect to left travel. The oil makeup operation for right travel operates in the same manner.
If the left travel control lever is returned to the NEUTRAL position in order to stop left travel, supply of pump oil to left travel motor (2) is blocked at passage (10). The left travel motor continues to rotate because of the mass of the machine. A negative pressure at passage (3) of motor rotary group (1) opens check valve (4) .
With left travel control valve (9) in NEUTRAL position, return oil from passage (11) flows to passage (8). The return oil goes through line (7), through swivel (6), through line (5), and into left travel motor (2). The oil passes through opened check valve (4), through passage (3), and into motor rotary group (1) as makeup oil. The makeup oil eliminates the possible occurrence of cavitation in the travel motor.
The Oil Makeup Operation on CIPI Undercarriage Arrangements which are Based on 330B Track Type Excavators
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| Illustration 2 | g00586686 |
Oil makeup operation (1) Motor rotary group (2) Left travel motor (3) Passage (4) Check valve (5) Line (6) Swivel (7) Line (8) Passage (9) Left travel control valve (10) Passage (11) Return passage | |
Return oil from the travel control valve is used as makeup oil to prevent a vacuum condition in the travel motor when operation is stopped.
Oil makeup operation is given with respect to left travel. Oil makeup operation for right travel operates in the same manner.
If the left travel control lever is returned to the NEUTRAL position in order to stop left travel, supply of pump oil to left travel motor (2) is blocked at passage (10). The left travel motor continues to rotate because of the mass of the machine. A negative pressure at passage (3) of motor rotary group (1) opens check valve (4) .
With left travel control valve (9) in NEUTRAL position, return oil from passage (11) flows to passage (8). The return oil goes through line (7), through swivel (6), through line (5), and into left travel motor (2). The oil passes through opened check valve (4), through passage (3), and into motor rotary group (1) as makeup oil. The makeup oil eliminates the possible occurrence of cavitation in the travel motor.
The Oil Makeup Operation on CIPI Undercarriage Arrangements which are Based on 330C Track Type Excavators
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| Illustration 3 | g00845743 |
Oil makeup operation (1) Motor rotary group (2) Left travel motor (3) Passage (4) Check valve (5) Line (6) Swivel (7) Line (8) Passage (9) Left travel control valve (10) Passage (11) Return passage | |