Crown Equipment Stockpicker SP 3500 Series - Manual (Page 6)

Travel System
Truck performance specifications
(maximum travel speed, coast,
plugging, acceleration, travel
speed at height, and low speed
lowering) are adjustable using
Access 1 2 3. This enables cus-
tomizing truck performance to
meet specific application 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 what it is,
where it is, and what it does
(Three W’s). InfoPoint ensures
faster, simpler, and higher
quality service.
Intelligent Steering
Standard on the SP 3500
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°. Access 1 2 3 moni-
tors 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 diagnos-
tics and operator interface.
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.
Braking can also be accom-
plished 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.
High-speed lift is standard on
SP 3520 and SP 3550H models.
Crown-manufactured solenoid
type manifolds with built-in
checks and relief valves.
Two-speed lowering (high/low)
with soft start is standard on all
models. Low speed lowering is
adjustable with the use of the
Access 1 2 3 Display. 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
steering control module.
Maximum lowering speed
is regulated by a pressure
compensating 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 two- and three-
stage masts feature nested rail
design with lift cylinders posi-
tioned behind mast rails. Three-
stage mast has a low center
position cylinder for free lift.
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. Tandem load wheels
are 6" diameter polyurethane
x 2.8" wide (4.25" wide for lift
heights above 348"). Optional
polyurethane aisle guide
wheels are 2" wide with a 4"
or 2.5" diameter.
Forks
2" thick x 4" wide forged steel.
Fork spread (adjustable) 24" to
30". Standard length is 36".
Optional lengths available.
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 manu-
facturing tolerances. Performance
is based on an average size vehi-
cle and is affected by weight, con-
dition of truck, how it is equipped
and the conditions of the operat-
ing area. Crown products and
specifications are subject to
change without notice.
SP 3500 Series Technical Information
Because Crown is continually improving its products,
specifications are subject to change without notice.
Crown, the Crown logo, the color beige, the
Momentum symbol, Work Assist, Access 1 2 3 ,
InfoLink and InfoPoint are trademarks of
Crown Equipment Corporation.
Copyright 2005 Crown Equipment Corporation
SF14832 10/07
Printed in U.S.A.
Crown Equipment Corporation
New Bremen, Ohio 45869 USA
Tel 419-629-2311
Fax 419-629-3796
crown.com
You can count on Crown to build lift trucks
designed for safe operation, but that’s
only part of the safety equation. Crown
encourages safe operating practices through
ongoing operator training, safety-focused
supervision, maintenance and a safe working
environment. Go to crown.com and view our
safety section to learn more.
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