HYDRAULIC OIL FILTER RELIEF VALVE

TM 5-2420-222-20-1

HYDRAULIC SYSTEM - CONTINUED

Fed low pressure hydraulic fluid returning through oil lines from loader control valve, jaw direct linear valve, and

backhoe control valve; and from hydraulic impactor if installed.

Surge relief valve returns hydraulic fluid through return oil line to transmission case sump to protect hydraulic

system when pressure is too high.

Filter relief valve returns hydraulic fluid through return oil line to transmission case sump when fluid is heavy during

warm-up or if filter element becomes clogged.

Routes return hydraulic fluid through hydraulic oil filter and out through low pressure oil lines to hydraulic pump.

HYDRAULIC OIL FILTER

Cleans return hydraulic fluid routed through it by hydraulic oil filter relief valve.

HYDRAULIC OIL FILTER RELIEF VALVE-TO-CLUTCH CONTROL VALVE ADAPTER OIL LINE

Routes return hydraulic fluid from hydraulic oil filter relief valve, directly to clutch control valve-to-hydraulic pump

inlet oil line.

Protects hydraulic pump from cavitation damage.

HYDRAULIC OIL FILTER RELIEF VALVE-TO-TRANSMISSION CASE OIL HOSE (NOT SHOWN)

Routes excess return hydraulic fluid from hydraulic oil filter relief valve to transmission strainer element (filter

screen) in transmission case.

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