PROTECTIVE DEVICES

TM 55-4920-426-13&P

PROTECTIVE DEVICES:

--Iocated on the inlet side of the high pressure pump to return

RELIEF VALVE

hydraulic fluid to the return system when/if the boost pump pressure

exceeds the high pressure pump setting.

DIFFERENTIAL PRESSURE

--located across the inlet and outlet ports of the high pressure filter,

SWITCH

illuminates a red warning light "H. P. FILTER CLOGGED" on the in-

strument control paneI.

DIFFERENTIAL PRESSURE

--located on the back of the control panel, illuminates a red warning

SWITCH

light "L.P. FILTER CLOGGED" on the instrument control panel.

THERMOSWITCH

--located before the high pressure pump, will shut off the gasoline

engine when the hydraulic fluid temperature exceeds 160F.

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