9
ADJUSTING THE HIGH SPEED BYPASS VALVES
A needle valve (Please see illustration on page 24 part # 8) is located next to the bypass valve on each
cylinder. It controls the oil flow into the pilot port of the bypass valve. Therefore controlling the
length of time it takes the bypass valve to close.
Watch the bypass valve open and close
You can actually see the valve open and close by watching the plunger on top of the bypass valve.
When the plunger is up the valve is closed.
When the plunger is down the valve is open.
Again when the bypass valve is open (the plunger is down) the lid comes down in high-speed mode.
Once closed (the plunger is up) the lid will fall at standard speed and pressure. Slowing the oil flow
into the valve will lengthen the time it takes to close, thus increasing the distance the lid will fall in
the high-speed mode.
How to adjust.
To Increase the distance the lid falls at high speed; turn the needle valve in (clockwise) which will
increase the time it takes to close the bypass valve.
To Decrease the distance the lid falls at high speed; turn the needle valve out (counterclockwise) to
decrease the time it takes to close the bypass valve.
The bypass valves are set at the factory to close in 3-4 seconds.
This means the lid will fall about 3-4 feet in the high-speed mode. Then switch to standard speed and
pressure for the last 4-5 feet.
On the first and second cars, the lid will slow to standard speed prior to hitting them. As the pile of
cars gets taller the lid will make contact with them in the high-speed mode.
Example: If the lid only falls for 2 seconds before hitting the load, it will just sit there until the valve
closes. In this example it will sit for an additional 1-2 seconds. After the bypass valve has closed the
cylinders will operate at standard speed and pressure.
It is completely normal for the crusher lid to stop for a few seconds on any load that is taller than 6
feet.
Important: If your crusher is equipped with a remote control, changing the factory setting will effect
how the rock cycle works. If you increase the distance that the lid falls you must increase the height
of the rock cycle. (Please see illustration on page 33 or call the factory prior to making adjustment)
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