Hydraulic System (General Information)

The W110 and W150 windrower hydraulic system provides oil for the drive, header lift and drive systems.

The components in this system are built to very close tolerances and have been adjusted at the factory. Do NOT attempt to service these components except to maintain proper oil level, change oil and filters.

Contact your dealer for hydraulic system service above and beyond routine maintenance.

IMPORTANT: The components in this system are built to very close tolerances and have been adjusted at the factory. Do not attempt to service or adjust these components, except to maintain correct oil level and to change oil and filter. See your John Deere dealer for all other service.

Dirt, dust, water and foreign material are the major causes of trouble developing in the hydraulic system.

If the hydraulic system should be disconnected for service, protect the ends of hoses, tubing and ports of components from contamination with clean, lint-free towels or clean plastic bags.

Flow Control Blocks

E67762-UN-11SEP12

W110 Flow Control Blocks

E67763-UN-11SEP12

W150 Flow Control Blocks

The valve blocks are located behind the left cab-forward side platform.

The valve blocks do not require any scheduled maintenance other than to check for leaking fittings or loose electrical connections.

Header and Reel Hydraulics

Pressure Compensator Valve

The pressure compensator valve is pre-set to be sufficient for all header sizes and options.

When the system operating pressure approaches the compensator valve setting, a warning tone sounds on the CDM, indicating a potential overload on the header drive.

If operation continues and the pressure reaches the setting, the compensator valve is activated. The header drive will begin to slow down to avoid overheating the drive pumps.

Reduce the ground speed to maintain the correct system load and header drive operation.

NOTE: The warning tone is only heard if load sensor is installed. The warning tone is normal when the operating pressure is very close to the compensator valve pressure setting.

If lift and drive capacity problems develop, the pressure compensator valve may require adjusting. Contact your dealer or refer to the Technical Manual for your windrower.

HEADER MODEL	APPLICATION / SYSTEM	SUGGESTED OVERLOAD WARNING SETTING kPa (psi)	WINDROWER PRESSURE DIFFERENTIAL RELIEF SETTING kPa (psi)
D-SERIES	Reel / Draper Pressure	20 684 (3 000)	22 063 (3 200)
A-SERIES	Knife / Conditioner Pressure	27 579 (4 000)	28 958 (4 200)