9
Quarry Hydraulic Excavator
The PC350-7 is a specially designed heavy-duty machine.
The PC350-7 has strengthened work equipment and various
machine body parts for use in severe job sites such as quar-
ry and gravel gathering, etc.
Cab with two-piece
pull-up window
(optional)
Fixed one-piece lami-
nated front window
glass
The front window is
fixed and uses lami-
nated safety glass to
prevent scattering of
glass fragments when
broken.
Fixed Skylight and Sunshade
Heavy-Duty Boom
Heavy-Duty
Arm
Dent Preventing
Plates
Plate length
increased 37%
Deck Guard
Strengthened Revolving
Frame Undercover
Full Roller Guard
Quarry Bucket and Work Equipment
PC350-7 bucket is designed exclusively for quarry use and is
higher strength for impact and wear. Various parts of work
equipment are also strengthened.
Large Counterweight
The PC350-7 counterweight is increased by
900 kg
1,980 lb for better stability.
Side Shrouds
Long Life
Bucket
Teeth
Lip
Shrouds
Side Reinforcement plate
16 mm
0.63” thickness high-
tensile strength steel used
O-Ring Added
O-ring is added between
bucket and linkage to prevent
entrance of dirt
Corner Tooth
Adapter
Double-Flange Track Roller
Double-flange roller guides track link cor-
rectly and extends life of undercarriage.
Number of double-flange track rollers
PC350-7 . . . . . . . . . . . . .3 each side
PC350LC-7 . . . . . . . . . . .4 each side
Bottom Wear Plate
19 mm
0.75” thickness high-
tensile strength steel used
Photo may include optional equipment.
Photo may include optional equipment.
Easy Maintenance
Komatsu designed the PC350-7 to have easy service
access. We know by doing this, routine maintenance and
servicing are less likely to be skipped, which can mean a
reduction in costly downtime later on. Here are some of the
many service features found on the PC350-7.
●
Easy Radiator Cleaning
Clearance between radiator
and oil cooler is increased to
facilitate radiator core cleaning
with an air nozzle.
●
Water Separator and
Corrosion Resistor
are stan-
dard equipment, removing
water mixed in fuel and prevent-
ing fuel and cooling systems
damage.
●
Easy Access to Engine Oil
Filter and Fuel Drain Valve
Engine oil filter and fuel drain
valve are remote mounted to
improve accessibility.
●
Fuel Tank Capacity Increased
Fuel tank capacity is increased from
540 ltr
142.7 U.S. gal
to
605 ltr
160.0 U.S. gal to extend operating hours before
refueling. Fuel tank is treated for rust prevention and
improved corrosion resistance.
Work Equipment Lubrication Intervals Are
Extended with BMRC Bushings
Newly developed BMRC bushings are used on the work
equipment. All bushing lubrication intervals of work equipment
are extended reducing maintenance costs. (except bucket
pin bushings)
8
Water Separator
Multi-Function Color Monitor
PC350-7
PC350-6
Engine oil
500
250
Engine oil filter
500
250
Hydraulic oil
5,000
5,000
Hydraulic oil filter
1,000
500
A newly developed Multi-Function Color Monitor has multiple
functions, such as Working mode selection, hydraulic pump
oil flow adjustment for matching to attachment, and mainte-
nance interval notice, etc.
EMMS (Equipment Management Monitoring System)
Monitor Function
Controller monitors engine oil level,
coolant level, engine oil pressure,
coolant temperature, battery charge
and air cleaner clogging, etc. If the
controller finds any abnormality,
it is displayed on the LCD.
Maintenance Function
Monitor informs replacement time
of oil and filters on LCD when the
replacement interval is reached.
Trouble Data Memory Function
Monitor stores abnormalities for effective troubleshooting.
Remote
Mounted
Engine
Oil Filter
Easy Radiator Cleaning
PC350-7
PC350-6
Boom foot and boom
cylinder bottom bushings
500
50
Other bushings*
500
100
Work equipment lubrication interval
unit: hours
Reducing Maintenance Costs
●
Hydraulic Oil and Filter/Engine Oil and Filter
Replacement Interval Extended
The new high performance filters are used in hydraulic circuit
and engine. Hydraulic oil filter, engine oil, and engine oil fil-
ter element replacement intervals are significantly extended
to reduce maintenance costs.
Comparison of Replacement Intervals
unit: hours
M
AINTENANCE
F
EATURES
H
Y D R A U L I C
E
X C A V A T O R
HYDRAULIC EXCAVATOR
PC350-7
PC350-7
0
BMRC (Beta Matrix Reinforced Copper Alloy)
A bushing made by combining a sintered copper layer
impregnated with oil for better
fitting and a backing metal. It is
used for severe application
parts which receive low rocking
stresses and high loads to
prevent creaking and scuffing
because of its excellent sliding
characteristics.
Resin Made Shim
Resin made shims are used
for work equipment pin
connections (except bucket
connections) to reduce noise.
Backing metal (steel)
Sintered Al bronze layer impregnated
with high-performance lubricating oil
Resin shim
(*:except bucket pin bushings)
