User manual

TECHNICAL DATA
FUEL SYSTEM – DIESEL
• The diesel fuel tank is integral to the
truck frame.
• Easy-servicing diesel fuel system includes
clean-out access and a full-fl ow fuel fi lter
with water separator.
COOLING SYSTEM
The high-capacity aluminum radiator is de-
signed with an effi cient thermal transfer fi n
and integral oil cooler for the transmission
torque converter.
• System design allows easy access to the
reservoir for checking the coolant level.
• High-volume cooling fan uses fl exible
plastic blades and shroud for maximum air
volume and noise reduction.
ELECTRICAL SYSTEM
Standard instrument package and operator
conveniences:
• 12-volt electrical system
• 50A alternator with built-in IC regulator
• Key-lock, anti-restart ignition switch
• High-torque, low-amp starter motor with
planetary gear reduction
• Waterproof electrical connectors
• Electric fuel gauge, water temperature
gauge, LCD hour meter
• Indicator lights for Neutral/Return to
Neutral, Low Oil Pressure, Low Battery/
Alternator Output, Check Engine Warning,
Hydraulic Lock (Operator Presence), and
ECCS Status Code
• ECCS Service Support Tool connector for
rapid system diagnostics
• Sedimenter warning lamp and glow
indicator (Diesel Models Only)
HYDRAULIC SYSTEM
The Hydraulic System features a tandem
pump assembly with separate pumps for
load handling and steering. This enables
faster lifting at engine idle speed for greater
fuel economy and performance levels.
• Large hydraulic fl uid reservoir integral to
the truck frame reduces heat buildup in
the system.
• Load sensing valve in the hydraulic circuit
reduces the fl ow of oil to the power steering
system when steering wheel is idle.
• Hydraulic System is fully fi ltered and
features a powerful and effi cient direct
drive gear pump.
FRAME
An all-welded assembly with heavy-gauge
steel and integral hydraulic and fuel tanks
provide exceptional durability.
• Welded front cross-member and bolted
drive axle increase frame rigidity.
• Loads are transferred directly from the
mast to the drive axle and onto the fl oor
without being transmitted through the
frame, reducing frame stress.
• Wide, open step area, with non-slip
surface facilitates easy operator entry
and exit.
DRIVE AXLE
A heavy-duty, cast steel drive axle housing
supports the load and chassis without
placing a load on the free-fl oating axle
shafts. A fl ange is mounted to the truck
frame to improve load distribution and
reduce frame fl exing.
TRANSMISSION
Komatsu single-speed, powershift trans-
mission is specifi cally designed for industrial
applications.
• Column-mounted electrical shift lever
gives the operator easy directional
control without removing a hand from
the steering wheel.
• Optimized stall ratio for torque converter
provides high torque without sacrifi cing
travel speed.
• A modulating control valve absorbs initial
pressure spikes during initial engagement
and directional change. This improves
shifting capabilities and prolongs the life
of the entire drive train.
• Transmission oil is double-fi ltered by a 125-
micron mesh on pickup, and a 35-micron
cartridge on the return line.
• Transmission oil cooler is integral with
the radiator.
• Inching control and auxiliary brake pedal
combination allows the operator precise
truck positioning with positive control.
BRAKES
Hydraulic brakes are self-energizing and
self-adjusting.
• Brake fl uid reservoir is located under the
console cover for fast, easy inspection
and maintenance.
• Heavy-duty brake backing plate and thick
brake drum provide reliable braking action
and reduced heat.
• Mechanical parking brake has two-
stage latching mechanism for positive
engagement.
• Power assist is available on selected models.
STEER AXLE
Fully Hydrostatic Power Steering is standard.
• Independent power steering pump sepa-
rates steering function from main hydraulics
for smoother, more reliable action.
•
Heavy-duty fabricated steer axle has
double-acting, double-ended power
steering cylinder and no drag links or
tie rods.
• Steering stops are machined into the
steering cylinder to reduce stress impact
on steering linkages.
• Grease fi ttings on all linkages are acces-
sible without lifting the truck.
MAST, CARRIAGE, LBR AND FORKS
High-visibility mast assembly has a 6-roller
carriage that is available in two-, three-, and
four-stage Free Lift, Free View designs.
• Sealed bearings require no maintenance.
• Angle-mounted bearings and a shaped
rail fl ange prevent excessive wear and
friction, while maintaining correct side
thrust clearance.
• ITA Class II or Class III carriages accept a
variety of fork sizes and common load-
handling attachments.
• 48-inch-high load backrest is standard
for increased load control and operator
protection.
• Single or double auxiliary hydraulic-
function internal hose routing is available.