Congratulations on the purchase of a HWP-125HDGS Grapple
Saw from Halverson Wood Products, Inc. This machine was
built with the strength of the logging industry in mind!
Please take time to read through this manual so you may
better understand our commitment to safety and satisfaction.
The HWP-125HDGS grapple saw is designed to operate with a
standard auxiliary hydraulic flow of 15 to 20 gallons per
minute (GPM). A flow rate of over 20 GPM will exceed the
saw motor capabilities and can cause premature failure. If
your machine exceeds 20 GPM you will want to run it at a
reduced throttle setting to ensure the output DOES NOT
EXCEED 20 GPM!! If you run over 20 GPM, any damage
caused will not be warrantied.
Never run the machine on high flow or without
a case drain. This will cause back pressure to
the saw motor and result in internal damage to
the hydraulics and saw motor.
The HWP-125HDGS is designed to operate with hydraulic
pressure between 2850 psi and not to exceed 3000 psi. If the
pressure is lower than 2850 psi your saw will perform poorly
(stall out or chatter). If you exceed 3000 psi you may cause
damage to the valve body or to the saw motor. Running over
3000 psi and any damage this causes will not be warrantied.
In addition to the standard pressure and return lines the
HWP-125HDGS requires a low pressure 3/8" case drain line.
The saw motor has a small amount of internal leakage to
provide lubrication to the motor's internal moving parts. The
leakage collects in a cavity behind the motor shaft seal. If the
oil can't escape, it can build enough pressure to damage the
saw shaft seal. Do Not tee the case drain line into the main
return line of your machine. The main return line passes
through the hydraulic filter and creates enough back pressure
that would cause the saw motor to be damaged. The 3/8" low
pressure line must be connected directly to the reservoir of
your machine with no restrictions. Failure to install a 3/8"
low pressure line without restrictions and any damage this
may cause will not be warrantied.
HIGH FLOW!!
AND
NEVER RUN
MACHINE
WITHOUT A
CASE DRAIN!!
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