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SP 3470F Series
Technical Information
Travel System–continued
Linear speed control provides
smooth travel speed transition as
lift heights change and increases
productivity.
Truck performance specifications
(maximum travel speed, coast,
plugging, acceleration, travel
speed at height, and low speed
lowering) are adjustable using the
Crown Service Terminal. This
enables customizing truck perfor-
mance to meet specific applica-
tion or operator requirements.
Crown’s InfoPoint system offers
evolutionary refinement for
service simplicity. The InfoPoint
Quick Reference Guide, on-truck
component maps and informa-
tion nuggets located throughout
the truck allow technicians to
troubleshoot without schematics,
wiring diagrams, or service
manuals for more than 95
percent of repairs.
The InfoPoint Quick Reference
Guide provides code definition
and overall component ID so
the technician knows where it is,
what it is and what it does
(Three W’s). InfoPoint ensures
faster, simpler, and higher
quality service.
Intelligent Steering
Standard on the SP 3400
Four-Point Series is electronic
steering that is microprocessor
based.
Crown’s intelligent steering fea-
ture slows the truck automatically
when the steer wheel is turned
beyond 10°. Using the intelli-
gence of Crown’s Access
traction control module, the
truck monitors the height of
the operator platform, truck
speed and steer wheel position.
Steering wheel rotation provides
smooth, operator feedback. Steer
effort is minimal, lock-to-lock
revolutions is 4.5 turns. Drive
wheel rotates a full 180° for
maximum maneuverability. Auto
centering drive tire for trucks
equipped with rail guidance.
Steering is connected to the
Control System for full
diagnostics and operator
interface. Crown PAC also
interfaces with steering system
for fast upgrade.
Intelligent Braking
System (IBS)
Crown’s patented Intelligent
Braking System combines
motor braking with optimum
amounts of friction braking
(three varying levels of force).
The appropriate level of braking
is applied dependent upon plat-
form height, direction of travel,
and truck weight. Braking force
is automatically reduced as
height increases and speed
decreases. Optimum braking
for the right elevation gives
operators more confidence and
better control, while eliminating
abrupt stops and reducing plat-
form sway. Brake lining life can
be expected to last up to twice
as long before replacement
is necessary.
Brake system eliminates
hydraulic lines running in mast to
control braking. Braking can also
be accomplished by proportional
plugging, which permits the
operator to control the rate of
deceleration when extended
stopping distance is preferred.
Simplified Hydraulics
Heavy-duty series wound pump
motors and gear pumps are
assembled into an integral unit.
Two-speed lift (high/low) is
standard. Crown-manufactured
solenoid type manifolds with
built-in checks and relief valves.
Two-speed lowering (high/low)
with soft start is standard. Low
speed lowering is adjustable with
the use of the Service Terminal.
Soft-start lowering feature
reduces the harshness at the
beginning and end of the
lowering cycle. The softer start
is accomplished by controlling
how quickly the proportional
valve is opened or closed.
Valve actuation is controlled
by a driver in the
networks
traction control module.
Maximum lowering speed is
regulated by a pressure com-
pensating flow control valve.
Velocity fuses are used in all
cylinders to stop lowering should
lowering speed exceed a preset
value due to a line rupture. A
hydraulic accumulator is used to
cushion raise and lower func-
tions. Manual lowering control on
manifold block allows lowering of
platform from ground level. Oil
reservoir is designed with a 100
mesh screen at the fill location,
a suction strainer, spin-on type
10 micron return line filter and a
magnetic drain plug.
The Crown Mast Assembly
High visibility three-stage mast
features nested rail design with
lift cylinders positioned behind
mast rails. Mast has a low center
position cylinder for free lift.
Improved mast cable life due
to larger, 5" diameter pulleys.
Routing of hosing and cables
optimizes visibility through mast.
Built-in sensors detect chain
slack and shut down primary
lower function. Exclusive
spring-loaded staging bumpers
virtually eliminate platform
impact as platform stages.
Negative rail drop allows shim-
ming of mast rollers without
major disassembly.
Stronger Low Profile
Power Unit
Power unit is fabricated from
heavy-gauge steel. Lower skirt
is .75" steel that runs 9" high for
component protection. Rugged
steel doors suspended on
heavy-duty pin hinges cover
power unit componentry. Doors
swing wide for open access.
Doors can also be lifted off for
unrestricted service access.
Door bolts have exclusive
convex design that mates with
concave door holes for fast
reinstallation of door bolts.
Battery side covers are all steel.
An optional battery retainer
interlock switch is available. Top
battery access is available by
lifting cover. Cover has integral
support post.
Wheels and Tires
Polyurethane drive tire, 13"
diameter x 5.5" wide x 8" hub
diameter. Load wheels are
6" diameter polyurethane x 4.25"
wide. Optional polyurethane aisle
guide wheels are 2" wide with a
4" or 2.5" diameter. Casters have
dual 3" wide x 10" diameter
polyurethane load wheels.
Forks
Standard fork is 2" thick x 4"
wide x 36" long forged steel,
with optional lengths available. A
3" thick x 6" wide x 84" long box
section fork is optional. Fork
spread (adjustable) 24" to 30".
Pallet Clamp
Standard equipment includes a
foot-applied, hand-released pallet
clamp designed for use with
pallets having center stringers.
Safety Shield
Safety glass to protect operator
from chains and moving parts
while in his normal operating
position.
Audible Travel Alarm Option
Safety considerations and
dangers associated with audible
travel alarms include:
• Multiple alarms can cause
confusion.
• Workers ignore the alarms
after day-in and day-out
exposure.
• Operator may transfer the
responsibility for “looking out”
to the pedestrians.
• Annoys operators and
pedestrians.
Other Options Available
Contact your local Crown dealer.
Dimensions and performance
data given may vary due to
manufacturing tolerances.
Performance is based on an
average size vehicle and is
affected by weight, condition of
truck, how it is equipped and
the conditions of the operating
area. Crown products and
specifications are subject to
change without notice.