Dawson EMV-220 METRIC, Operator'S Instructions/Spare Parts List

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nation is introduced into the hydraulic circuit during installation – this may cause
internal component damage to the hydraulic system or faulty operation of the
vibrator or excavator.
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application. For permanent installation ball valves can be added to the excavator
boom to ensure rapid changing between bucket and EMV hydraulic function. As
the bucket ram is no longer in use, it should be retracted and fastened down.
WARNING: THE DRAIN LINE MUST FLOW DIRECTLY TO TANK
WITHOUT RESTRICTION. FAILURE TO DO SO WILL RESULT IN THE
HYDRAULIC DRIVE MOTOR BLOWING ITS CASING SEAL OR FRONT
CASING CASTING – THIS DAMAGE IS VERY COSTLY TO REPAIR.
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check valve that vents some oil to atmosphere should the motor case drain line
pressure exceed approximately 6 bar. It is not a pressure protection valve and is
intended only as an early warning valve, giving a visual signal that something is
wrong. Any sign of this and use of the EMV should be halted immediately and the
cause investigated.
The blow-off valve does not guarantee the motor will be protected in all
circumstances!
4.2
HYDRAULIC HOSES -
LAYOUT & CONNECTIONS
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lines (already connected to the vibrator) have metric 16 S. The pressure line is
usually connected to the bucket ram “extend” circuit and the return line to the
bucket ram “retract” circuit. The third, and smaller, drain line is fed either directly
back into the hydraulic tank on the excavator, or connected to the breaker circuit
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Connect drainline
directly to
excavator tank
Connect to bucket
ram retract hose
Connect to bucket
ram extend hose