HYDRAULIC EARTH DRILL BLEED OIL LINE

TM 5-2420-222-20-1

HYDRAULIC SYSTEM - CONTINUED

Routes excess hydraulic fluid from hydraulic earth drill hydraulic motor lubrication to transmission case sump.

Protects hydraulic earth drill hydraulic motor seals from pressure build-up.

BACKHOE CONTROL VALVE-TO-BACKHOE BOOM CYLINDER OIL LINES (2)

Route high pressure hydraulic fluid between backhoe control valve boom valve and backhoe boom cylinder.

BACKHOE BOOM CYLINDER

Connected through high pressure oil lines to backhoe control valve boom valve.

Extends and retracts backhoe boom.

BACKHOE CONTROL VALVE-TO-BACKHOE SWING CYLINDER OIL LINES (4)

Hoses and manifold block route high pressure hydraulic fluid between backhoe control valve swing valve, and left

and right backhoe swing cylinders.

BACKHOE SWING CYLINDERS (2)

Connected through high pressure oil lines to backhoe control valve swing valve.

When one cylinder extends the other retracts to swing backhoe boom from side to side.

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