7032 SOUTH 196th - KENT, WA 98032 - (253) 872-0141 / FAX (253) 872-8710
OPERATION / MAINTENANCE MANUAL
MODEL 50 VIBRATORY HAMMER WITH MODEL 260 POWER UNIT
3. Clamp "OPEN/OFF/CLOSE" Switch
The CLAMP OPEN/OFF/CLOSE SWITCH is used to control the direction of the hydraulic flow
coming from the clamp pump. When the engine is running and the switch is in the "OFF"
position, all clamp PUMP oil is returned to the tank. Turning the CLAMP CLOSE/OFF/OPEN
SWITCH to the close position energizes the clamp close solenoid, which can be observed
with the lighted connector. When the close solenoid energizes, the clamp close valve closes
sending hydraulic oil to the closed side of the clamp cylinder. When the pressure reaches
3300 psi, the CLAMP PRESSURE SWITCH (located on the clamp manifold) opens, de-
energizing the closed solenoid and lighting a lamp in the CLAMP OPEN / OFF / CLOSE
SWITCH and the green lamp on the remote HAND HELD PENDANT. If the pressure drops
below 3000 psi, the CLAMP PRESSURE SWITCH closes allowing the close solenoid to
recharge the clamp close hydraulic circuit. Note: If the light on the solenoid stays on and the
green light on the pendant fails to come on then the pressure switch may be faulty. Do not
operate the machine if you can see the clamp closed solenoid light on all the time. (Note: the
clamp closed solenoid light is located on the solenoid.) It should go off as soon as the jaws
close and the pressure rises above 3300 psi. When jaws are closed properly, the green light
will glow on the remote pendant, or if operating from the panel, the green light is built into the
switch.When the diesel engine is running, Turning the clamp switch to "OPEN" energizes the
open solenoid and directs oil to the open side of the clamp cylinder and the jaws open.
4. Drive "FORWARD/REVERSE" Switch
The DRIVE FORWARD/REVERSE SWITCH is used to control the hydraulic motors on the
vibrator or for supplying forward and reverse direction on a drill. With the engine running and
the DRIVE FORWARD / REVERSE SWITCH in the forward position, the forward drive
solenoid energizes, which can be observed with the lighted connector. With the forward drive
solenoid energized, the forward valve opens, sending hydraulic fluid to the hydraulic motors,
and the motors rotate. With the engine running and DRIVE FORWARD/REVERSE SWITCH
in the reverse position, the reverse drive solenoid energizes, which can be observed with the
lighted connector. With the reverse drive solenoid energized, the reverse valve sends oil to
the vibrator motors but the motors do not rotate because all oil flow is directed around the
motors via the ANTI-CAVITATION CHECK VALVE located on the vibro suppressor housing
and plumbed into the hoses leading to and from the hydraulic motors. Therefore, the vibrator
runs in the forward direction only, and this direction is used for driving or pulling all piles. The
reverse direction is used when the power unit is supplying oil to a drill or other attachment or
when flushing the oil during initial startup.
5. "SYSTEM OK" Light
The "SYSTEM OK" Light is lighted when the engine is running and all systems are normal.
6. "SPARE" Light
VII. MODEL 260 POWER UNIT (Continued...)
VII-2B.
Controls: (Understanding How They Work) (Continued...)
Page 7-5
To Next Page
Loading...