Equipped with single 24" diameter carbon-tipped saw
Powered with a Deutz air-cooled diesel engine New for
SkyTrim - 150 HP
* Available with
three track designs
rubber track or a cleated track are available
* Enclosed cab with A/C and
here to download the brochure in PDF format with
is manufactured by Kershaw, a division of Progress Rail
now a Caterpillar
available through a Caterpillar company.
with a CAT C4.4 127 HP 4-cylinder, 4.4L, turbocharged, charge-air-cooled, water
cooled, full muffler system, EPA Tier 3 compliant.
was widened 4" to accommodate the operator's console. The console is completely
inside the cab to eliminate the need for an extra sliding window to access the
control box. This console includes an electronic engine throttle control as well
as SAE J1939 Engine Diagnostics display for monitoring the engine parameters.
The console also features a hydraulic temperature gauge for convenient diagnosis
of hydraulic cooling issues. The saw on/off control is an electric safety switch
mounted on the console. This switch operates a solenoid operated hydraulic valve
outside of the cab thus removing additional hydraulic fluid from the operator's
compartment expanded for easier access to pumps and other components.
hose reel cover. Larger and made from ¼" steel plate.
rollers design improved. Rollers made from 2" diameter UHMW. Pins have full
welded heads and square stock added to tilt frame to prevent pins from turning
and wearing into tilt frame structure.
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seat base in the operator's cab is adjustable and has three positions to best
suit the operator's needs. The base can be adjusted between 0, 5, and 10 degrees
of rearward tilt to offer the operator a more comfortable position for viewing
limbs during trimming operations.
cradle and boom up/down cylinder pins now feature tapped holes in the heads for
use with slide hammers to aid in removal.
diameter pulleys on rear of boom drive assembly to improve hose feeding and to
prevent wear and tear on hoses and pulleys.
frame weldment material has been increased, as well as stiffeners added for more
robust design and improved longevity.
drive mount redesigned so that the diverter valves are lying flat to prevent build
up of debris and water on the valve end caps. Diverter valves are redesigned to
add a brass collar inside the valve to prevent spools from sticking.
frame has added large access openings in the side for improved mechanic access
for maintenance and repair work. Large control valvebank is repositioned to have
better access for adjustments and plumbing repair work.
drive motion control valve has changed. We're using a manifold mount block that
bolts directly to the boom drive motor. This eliminates the troublesome short
hoses on previous design. We also changed the valve to ductile iron instead of
aluminum to eliminate any possible problems with expansion and contraction of
the aluminum blocks.
has added front access panel for accessing hydraulic plumbing for foot pedals.
enclosure has been updated with standard automotive fuses for easy field repair
and readily available automotive parts.
boom drive now utilizes an overhung load adapter to support the massive side loads
developed by the boom drive chain system. This will improve shaft seal life in
the motor itself, as well as eliminate failures of motor shafts themselves. The
boom drive sprocket is redesigned to utilize a taper lock bushing system. This
will positively lock the sprocket in place on the shaft so that it cannot move
or come completely off of the shaft during operation.
heating and cooling in the cab. Changes as a whole will improve the heating and
cooling capabilities of the operator's cab. To aid in cooling, the following changes
were made. Removing all high pressure hydraulic oil from the cab will drastically
reduce the heat load inside the cab. Saw, plow, and winch plumbing removed from
the cab completely. Steering reduced to pilot pressure lines only. Foot pedal
plumbing inside enclosure that is separated from operator's compartment. Pilot
lines route through bulkhead fittings. This eliminates the large opening and allows
for a more complete seal on the cab structure. The LH sliding window has been
removed since the control panel is inside the cab. This will aid in sealing up
the cab also. Removing large openings and the sliding window will greatly increase
the ability to heat the cab to a comfortable temperature.
bolts on all thread rods on boom drive assembly were increased in size to 3/8".
stop rocker arms are redesigned and repositioned to improve longevity of these
Plow, winch, and steering functions are now all pilot operated for smoother operation.
The plow/winch controls are mounted such that the plumbing is entirely outside
of the cab. Plow/winch controls moved to new location conveniently located in
front of the operator to improve ease of operation. All hydraulic functions in
the cab are routed through bulkhead fittings in the cab floor to better seal the
cab for cooling purposes.