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Komatsu 2007 WA470-6 WA-480-6 Method of disassembling and connecting push-pull type coupler

Before carrying out the Komatsu 2007 WA470-6 WA-480-6 disassembling and connecting push-pull type coupler following work, loosen the oil filler cap of the hydraulic tank gradually to release the residual pressure from the hydraulic tank.

Even if the residual pressure is released from the hydraulic tank, some hydraulic oil flows out when the hose is disconnected. Accordingly, prepare an oil receiving container.

Type 1

1. Disconnection

1) Hold adapter (1) and push hose joint (2) into mating adapter (3). (Fig. 1) a The adapter can be pushed in about 3.5 mm. a Do not hold rubber cap portion (4). 2) After hose joint (2) is pushed into adapter (3), press rubber cap portion (4) against adapter (3) until it clicks. (Fig. 2) 3) Hold hose adapter (1) or hose (5) and pull it out. (Fig. 3) a Since some hydraulic oil flows out, prepare an oil receiving container.

Komatsu 2007 WA470-6 WA-480-6 Method of disassembling and connecting push-pull type coupler

 

2. Connection

1) Hold hose adapter (1) or hose (5) and insert it in mating adapter (3), aligning them with each other. (Fig. 4) a Do not hold rubber cap portion (4). 2) After inserting the hose in the mating adapter perfectly, pull it back to check its connecting condition. (Fig. 5) a When the hose is pulled back, the rubber cap portion moves toward the hose about 3.5 mm. This does not indicate abnormality, however.

2007 KomatsuWA470-6 WA-480-6 Method of disassembling and connecting push-pull type coupler

 

Type 2

 

1. Disconnection

1) Hold the tightening portion and push body (7) straight until sliding prevention ring (6) contacts contact surface (a) of the hexagonal portion at the male end. (Fig. 6) 2) While holding the condition of Step 1), turn lever (8) to the right (clockwise). (Fig. 7) 3) While holding the condition of Steps 1) and 2), pull out whole body (7) to disconnect it. (Fig. 8)

2007 KomatsuWA470-6 WA-480-6 Method of disassembling and connecting push-pull type coupler 1

 

2. Connection

Hold the tightening portion and push body (7) straight until sliding prevention ring (6) contacts contact surface (a) of the hexagonal portion at the male end. (Fig. 9)

2007 Komatsu WA470-6 WA-480-6 Method of disassembling and connecting push-pull type coupler 1

 

Type 3

1. Disconnection

1) Hold the tightening portion and push body (9) straight until sliding prevention ring (8) contacts contact surface (b) of the hexagonal portion at the male end. (Fig. 10) 2) While holding the condition of Step 1), push cover (10) straight until it contacts contact surface (b) of the hexagonal portion at the male end. (Fig. 11) 3) While holding the condition of Steps 1) and 2), pull out whole body (9) to disconnect it. (Fig. 12)

Komatsu 2007 WA470-6 WA-480-6 Method of disassembling and connecting push-pull type coupler 1

 

2. Connection
Hold the tightening portion and push body (9) straight until the sliding prevention ring contacts contact surface (b) of the hexagonal portion at the male end. (Fig. 13)

Komatsu 2007 WA470-6 WA-480-6 Method of disassembling and connecting push-pull type coupler 2

 

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