MSD Legend Series Operation & Maintenance Manual | 43
SPEED VALVE
The speed valve allows the jaws to shift into high speed while closing.
Clear all persons and equipment from the area of
operation and machine movement. NeVer move loads
over people or equipment. When viewing the operation
of the attachment, maintain a safe distance of at least
30 feet (10 meters).
Testing the Speed Valve
1.
Close the jaws and observe the movement.
2.
The jaws closing speed should increase after 1-2 inches of unobstructed movement.
3. If the jaw speed does not increase, adjust the speed valve.
Resealing the Poppet
Before adjusting the speed valve, check the poppet valve and reseal if necessary.
relieve pressure before disconnecting hydraulic lines
or disassembling hydraulic components. Tighten all
connections before reapplying hydraulic pressure.
Keep hands and body away from pin holes and nozzles,
which can eject fluids under high pressure. Use a
piece of cardboard to search for leaks. Escaping fluid
under pressure can penetrate the skin and cause
serious injury. If ANY fluid is injected into the skin, seek
immediate medical attention.
DO NOT let hydraulic oil get in contact with the skin as
it could cause severe burns. Hydraulic oil becomes hot
during operation. Wear adequate protective clothing
and safety equipment.
Chemicals used on LaBounty Saber Series hydraulic
cylinders include hydraulic oil; refer to the excavator
operator’s manual and have MSDS sheets and proper
treatment equipment available.
1.
Turn off the excavator and relieve any trapped pressure in the hydraulic system. Lock-out / Tag-out the hydraulic
power source.
Trapped hydraulic pressure may be present after the base
machine is shut off. Extreme caution must be taken when
removing hydraulic hoses or lines. injury or death could result.
2.
Slowly unscrew the poppet valve from the pilot valve, in 1/2 turn intervals until the poppet is removed.
