AIR-OPERATED LUBE CONTROL VALVE
The lube control valve when actuated, directs
accumulator pressure to the high pressure or actuating
side of the metering pumps.
AIR-SOLENOID VALVE
The air-solenoid valve, when energized, directs low
pressure air to an air cylinder on the lube control valve.
4-28
LUBRICATION OIL
FROM
LUBRICATION PUMP
LUBRICATION OIL TO
LUBRICATOR HOUSING
AND PISTON
HYDRAULIC FLUID FROM
LUBRICATION CONTROL VALVE
B
A
BLEED VALVE
RELIEF VALVE
O-RING
CHECK VALVE
PISTON
BACKUP
RINGS
HOUSING
ABEf0437
Figure 4-36.—Metering pump.
