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William Brenner
Presiding
Commissioner
Scott
Sader
Commissioner,
Eastern District
Destry
Hough
Commissioner,
Western District
Gilbert
Powers
March 31,
2008
INVITATION
TO
The
Johnson County Commission is requesting bids for the purchase of two four-wheel
drive motor grader for use by the Road and Bridge Department.
Bid
specifications may be obtained by contacting the County Clerk Office, 300 N.
Holden,
Sealed
bids will be accepted in the
The
JOHNSON
_________________________________________
William
Brenner, Presiding Commissioner
_________________________________________
Scott
Sader, Eastern Commissioner
_________________________________________
Destry
Hough, Western Commissioner
MOTOR GRADER BID SPECIFICATIONS
Basic Spec
·
Machine shall be designed and
built by the manufacturer
- Machine weight not less than 33,356 LBS
- Max Weight of the machine not less than 50,875
(INCLUDING FUEL, ETC)
- Length
from front outside edge to end of tow hitch no more than 343 in
- Wheel Base (distance from front axle to mid
tandem) not less than 241 in.
- Front frame needs to be formed structural
carbon steel tube, with a single, resistant weld
- Rear frame needs to have two box section
channels with integrated bumper
- Standard rear hitch will be provided
Engine
·
Designed and built by the
manufacturer
- Turbo-charged, direct injection, four stroke,
6-cylinder diesel engine
- Electronically controlled for better fuel
injection and fuel burn
- Displacement no less then 7.2L
- Develop, as standard, flywheel power of at
least 183 HP in 1st gear, 188 HP in 2 gear,
193 HP in 3rd Gear, 198 HP in 4th gear through 8th
gear.
- Utilize an increase of 5 HP per gear (in 1st
through 4th) as standard when shifting and downshifting HP plus
available to increase rated net flywheel power to at least 203 HP in 5th
gear, 208 HP in 6th Gear, 213 HP in 7th gear, 218 HP
in 8th gear.
- Rated engine power not to be achieved at an
engine speed greater than 2000 rpm.
- Peak engine power not to be achieved at an
engine speed greater than 1800 rpm.
- Isolation mounted to minimize sound and
vibration.
- Meet EPA Tier 3, without utilizing EGR.
- Fan should automatically adjust fan speed per
variable hydraulic fan pump for cooling requirements should allow for 500
hours between oil changes
- Enclosure and daily service points should be
easily accessible from ground level, and grouped on the left side of the
machine.
- Ether starting aid, and must automatically
meter ether injection to prevent engine damage.
- Increase its low idle speed to 1000 rpm when
battery when battery voltage is below 24.5 for more than 5 minutes to
ensure adequate system voltage.
- Jacket water heater be available to assist in
cold weather starting
Powertrain/Transmission
- Designed and built
by the manufacturer
- Direct drive, power
shift, and countershaft type
- Rear axle bolt-on
modular design offering easy access
- Load compensating
system
- Transmission has to
have 8 forward speeds and 6 reverse speeds
- 5 working gears
between 0-10,6 mph for dirt applications
- Differential
lock/unlock electro-hydraulically controlled
- Differential
lock/unlock not to have speed restrictions for engaging/disengaging
- Differential
lock/unlock multi-disc design
- Final drive
planetary design
- Equipped with an
electronic inching pedal for improved modulation
- Equipped with
electronic over speed protection to prevent the engine and trans from over
- speeding
- Diameter at the
output end should be no less than 2.29 in
- Equipped with built
in self diagnostic capability
- Programmable
auto-shift trans option should be available
- Transmission should
be isolated mounted to reduce sound and vibration
Brakes
- Multi disc, oil cooled and completely sealed
- Hydraulically actuated, dual independent brake
circuits
- Brake discs surfaces should be grooved and
carry oil between discs and plates w/brakes fully applied
- Meet all requirements of ISO 3450
- Provide a minimum of 3,565 in of total friction
material surface area used at each of the four Tandems
- Wheels to eliminate braking loads on the power train.
- Access to check and determine brake wear
without removing or disassembling the brake assembly
- Hydraulic brake accumulator
- Parking brake multi disc, oil cooled, spring
applied, hydraulically released, sealed, adjustment free and integrated
into the transmission
- Parking brake should be serviceable without
removing transmission
- Engaged parking brake will need to be
neutralize the transmission
Hydraulic system
·
Closed center, load sensing type,
with a variable displacement, axial piston type pump
- Hydraulic implement pump produce between 0 and
55.7 gallon/min of oil flow at high idle.
- Implement valves be electro hydraulic, designed
and built by the machine manufacturer.
- Implement valves be proportional priority
pressure compensating for consistence response,
- When multi functioning any combination of
implement controls and independent of engine speed
- Lock valves integrated into the mail implement
valve to prevent cylinder drift
- Blade lift cylinder has independent float
capability, actuated by two, three axis, multifunction Joystick controls
inside the cab
- Provision to install up to fifteen modulating
hydraulic valve, controlled by two, three axis, and multi-functioning,
joystick controls and auxiliary controls inside the cab.
- Hydraulic valves mounted under the cab floor,
to minimize sound and vibration
- Implement pump mounted under the cab floor, to
minimize sound and vibration.
- Implement pump solely dedicated to implement
controls and not shared with any other components.
- Hydraulic system be fully sealed, using
duo-cone and o-ring seals to prevent contamination and spillage.
- Hydraulic system has a separate oil tank,
dedicated to the implement pump
- Hydraulic tank has a baffling system to reduce
potential pump cavitations
- Triple redundant hydraulic relief system to
protect machines hydraulic components.
- Implemented hydraulic connections to have
o-ring face seals for leak prevention
- Hydraulic system pressure to be no more than
3,500 psi
- Hydraulic stand by pressure, no more than 450
psi
Front axle and tandems
·
Front axle, arched design for
maximum ground clearance
- Front axle oscillation be no less than 32
degrees total, per side 16 degrees up, 16 degrees down
- Front wheel steering angle be no less than 47.5
left or right
- Front wheel spindle bearings be
double tapered design with the larger diameter bearing mounted closest to
the centerline of the front tire.
- Front wheel spindle maintenance intervals be no
less than 2000 hours
- Wheel spindle be a live spindle design and
rotate inside a sealed compartment with lightweight oil for lubrication of
the bearings.
- Front spindle be heat induction hardened
- Electronic and mechanical steering stops
located at each wheel and steering cylinder relief valves are present to
prevent steering system damage during normal operation.
- Maximum front wheel lean shall be no less than
17.1 degrees left or right.
- Machine turning radiuses not exceed 25.6 ft
using front steering, full articulation and unlocked differential
- Steering tie rod ends be heat induction
hardened.
- Tandem chain pitch not be
less than 2.0 in.
- Distance between centers of tandem wheels no
less than 60 in
- Tandems be capable of
oscillating 15 degrees front tandem up and 25 degrees front tandem down, with
full machine articulation and having no interference between tandem wheel
and structure.
Tires and Rims
·
Available to provide mounting for
14.00-24 tires and 14.00R24 conventional tires
Operators Station
- An enclosed cab with (ROPS)
- Cab isolation mounted to the front frame
section of the machine
- Cab doors need to have an hold open clasp with
a ground level release in addition to, a release in the cab
- Cab will have wipers with washer s on the
doors, front and rear windows
- Wipers be available on side windows
- Rear defroster fan
- Left and right side cab doors
- Cab air filters
- Cab heater with four-speed fan
- 17 adjustable vents to direct air to front
windows and operator
- Electronic message system for real time machine
performance and diagnostic data
- Real time information system monitor all system
data and alert the operator of any faults
- through
a digital text display, programmable for multiple languages.
- Instrument cluster, speedometer, tachometer,
coolant temp, fuel, articulation angle gauge, and hour meter.
- Air suspension seat, cloth-covered seat, 3-inch
retractable seat belts, with adjustable position, Seat height, seat back
angle, thigh support, and lumbar support.
- Am/fm radio
- Toolbox on front of machine
Drawbar, Circle & Moldboard
·
Moldboard – have a bank slope
angle capability of at least 90 degrees on both sides
- No more than 6 replaceable wear inserts between
the circle and drawbar, replaceable drop in inserts, made from nylon
composite material.
- Circle and drawbar vertical adjustment points
be accessible from the top of the drawbar, for ease of maintenance
- Circle outside diameter be no less than 60.2
in, be a single piece, rolled ring forging, with raised wear surfaces on
the top and bottom.
- Circle shall be rotated by a hydraulically
driven motor with a minimum circle pinion torque capability of 44253 ft-lb
- Circle teeth contact surfaces be
induction-hardened on the from 240 degrees of the circle
- Moldboard side shift cylinder shall be
installed on the left hand side, to prevent snow wind interference, with
the cylinder rod.
- Moldboards have a hydraulic tip control through
a range of 40 degrees fore and 5 degrees aft.
- Moldboards
- 14 ft long, 24 in high and no less than 7/8 in thick
- Moldboards – slide rails be constructed of a
heat tread, high carbon steel, and hardened, continuously welded, and have
a replaceable bronze alloy wear insert at top and bottom
- Moldboard wear strips be adjusted with lock
screws, providing shim less adjustment capability both vertical &
horizontal.
- Blade lift and center shift cylinders have
replaceable bronze alloy wear inserts in the ball sockets with removable shims
to insure the ability to remove free play throughout the useful wear insert
life.
- Link bar 7 positions for increased versatility
- Moldboard – retention system has two retention
points located on the left and right side. The surface area not less than 50408
mm.
- Drawbar – feature welded protective wear plates
to prevent lift group contact with the primary surface
Electrical
Machine – 70-amp hour, 880 cca, maintenance free batteries
Machine – 80-amp alternator
Starting system be a 24 v direct electric type
A 24 V to 12 V converter
with 10-amp capacity
Electrical system has to have a master disconnect
switch with a removable key (in addition to
The ignition switch), accessible from ground level.
Incandescent white reversing lamps and LED stop
lamps
High and low bar headlights with front turn signals
3 x 3 in halogen or 5 x 5 in HID mid-frame toe
lights, to illuminate moldboard and surrounding area
Six 3 x 3 in halogen or six 5 x 5 in HID front
mounted cab lights
An amber high-speed strobe beacon on machine
Serviceability
Fuel fast fill be at ground
level, and capable of fill rates of up to 100 gallons/min
A guard to protect the machine’s transmission from
debris
Machine – 3 pints of contact on all areas of the
machine, for mounting and dismounting
Articulation joint has to have a mechanical locking
device to prevent frame articulation
While
servicing or transporting machine
Left and right side tandem case assemblies be covered with punched steel plate to provide
An
adequate platform for standing and walking
High-speed oil drain system with ground level quick
connect access
Sampling ports be accessible from the tandem level
and provide access to the engine, hyraulics, coolant,
and fuel ports
Minimum Service Fill Capacities
·
Standard fuel tank capacity no less
than 103 gallons
- Cooling system not less than 10.4 gallons
- Hydraulic tank not less than 16.6 gallons
- Engine oil capacity not less than 6.6 gallons
- Tandem housing capacity not less than 16.6
gallons
- Front wheel spindle bearing housing not less
than 0.13 gallons
- Circle drive housing not less than 1.8 gallons
Safety and Environmental
·
Standard black glare reducing
paint be used on the front frame and engine enclosure to decrease glare from
other equipment lights and reflection from the sun and snow
- Hydraulic implement lockout be
achieved by actuating a single electrical switch within the operator
station.
- Drop down rear lights be available to span the
profile of the machine
- Machine has to have a back up lights and
sounding alarm as standard reverse gears
- Operator presence system will lockout implements, not allow gear shift out of neutral and lock
parking brake if system detects operator not present.
- Circle drive slip clutch be provided to reduce
horizontal moldboard impact damage.
- Blade lift accumulator to reduce vertical
impact damage
- Outside mounted mirrors, with optional heated
- An external emergency kill switch for ground
level engine shut down
- Electrical system with a master disconnect
switch with a removable key and lock (in addition to the ignition switch)
- A guard be available to protect the machine’s
transmission from debris
- Machine provides dual exits allowing for
emergency
- Machine needs to have laminated glass for the
front windows and doors
Additional Features
·
Optional air compressor
- All Owners & Parts Manual are a MUST –
Unless we’ve already got a set, check with Road and Bridge supervisor