Volvo EC460B - Straight travel

Straight travel
1. All spools are in neutral condition.
- 40 bar enters in port-Pp which has three orifices.
- oil from one orifice connected to Py port and then pass through two travel spool and go to the return
line.
- oil from the other orifice pass through the straight travel spool and two travel spool and go to the return
line.
- Oil from the other orifice pass through every other attachment.
- P1 is going to supply TR side and Boom2 side through the straight travel valve.
- P2 is going to supply TL side and Boom1 side.
2. Travel (LH)
- Spool movement block the line from orifice and bulid up pressure.
- Travel pilot pressure switch ON
- P2 oil goes to TL side directly and Boom1 side parallel passage.
3. Travel (RH)
- Spool movement block the line from orifice and bulid up pressure.
- P1 oil goes to TR side directly and Boom1 side parallel passage
4. Boom-Up operation
- Boom spool movement block the line from the other orifice and build up pressure.
5. Attachment pilot pressure switch ON
- Block the back side of check valve
6. Straight travel spool side will be pressurized.
7. Straight travel spool move
From this point
- P1 oil goes to TR side directly and TL side through the straight travel spool.
- P2 oil goes to Boom1 side and Boom2 side.
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