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Standard Equipment
1. Crown’s Access 1 2 3
®
Comprehensive System Control
2. Crown’s AC traction
control system
3. 24-volt electrical system
4. Electronic steering
5. Linear Height Speed Contol
6. High-speed lift (SP 3520 and
SP 3550H)
7. Two-speed lower with soft
start and stop
8. Programmable lift/lower
cut outs
9. Intelligent Braking System (IBS)
with low-profile brake pedal
10. Crown Display
• Battery discharge indicator
with lift interrupt
• Hour meters/travel
distance/stop watch
• PIN code access capable
• Access 1 2 3 diagnostics
• P1, P2, P3 Performance
• Standard steer tire
direction indicator
(non wire-guided trucks)
• Enhanced steer tire
direction indicator
(wire-guided trucks)
11. Lift motor brush wear and
overtemp indicator (SP 3550H).
12. Soft urethane twist grip
with “cam grip”
13. 10° angled steer wheel with
soft feel spinner
14. Storage compartment
15. Premium platform cushion
16. Clear visibility platform
window
17. Clear visibility mast design
18. Key switch
19. Horn
20. Strobe light, amber
21. Hinged side gates with
power disconnect
22. 14.25" battery compartment
(13.12" on SP 3505)
23. 350 amp battery connector
(175 amp on SP 3505)
24. 2" diameter battery
compartment rollers
25. Top battery access for service
26. Removable steel battery
side covers
27. Adjustable battery retainer
28. Hinged, lift off steel power
unit doors
29. Emergency power cut-out
30. Operator belt and lanyard
Operator Platform
The operator area is designed for
maximum visibility and stability for
increased operator confidence
and comfort.
The operator platform features
a large window (1088 sq in) for
excellent visibility. A Crown-
designed clear-visibility mast
affords the platform window one
forward and two peripheral win-
dows for maximum visibility, even
when the platform is lowered.
The clear-visibility mast, with
full free lift, extends the platform
window above the mast
channels for unobstructed
visibility when raised.
A low-profile power unit, low
placement of the lower cross
brace and an outer C-channel
rail assembly also contribute to
excellent visibility.
A soft urethane twist grip is solidly
mounted to the truck console to
provide excellent stability for the
operator during travel, plugging
and braking. Controls for lift/lower,
horn and emergency disconnect
are conveniently located for
efficient operation and minimal
operator fatigue. The steering
wheel is angled at 10° and
recessed to maximize the work
area and reduce steer effort. The
steering wheel and spinner knob
are covered with soft urethane to
reduce grip force and insulate
against vibration. Control location
keeps the operator’s posture
neutral at all times.
The platform cushion, made of
a microcellular composition,
absorbs shock and vibration.
The brake pedal has a low-profile
design and when engaged is flush
with the platform cushion for
maximum comfort. Heavy-duty
side gates, with two horizontal
and one vertical support rails,
communicate security to the
operator. For additional safety,
cut-out switches disengage
truck operation when side gates
are raised.
Two work lights, two dome lights
and a two-speed fan are optional.
“Power-on” key prevents unau-
thorized operation of the truck.
The Access 1 2 3 Display Panel
provides concise, clear feedback
for the operator during truck
operation.
31. Pallet clamp
32. InfoPoint
®
Quick Reference
Guide and Maps
33. Color-coded wiring
34. 6" diameter tandem
load wheels
Optional Equipment
1. Crown wire guidance
(broadband technology)
operates on all frequencies
ranging from 5.2 through
10 Khz without changing
components.
2. End of Aisle Control System
(wire or rail guidance required)
3. Aisle guide wheels for
rail guidance
4. Lift motor brush wear and
overtemp indicator (SP 3520).
5. Enhanced steer tire
direction indicator
(non-wire guided trucks)
6. Battery retainer
interlock switch
7. Work lights, dome light
and two-speed fan
8. Spotlights
9. Flashing light, amber
10. Programmable lift/lower
cutouts with over-rides.
11. Zone select key switch
12. 48", 54", and 60" wide
operator platforms
13. Corrosion conditioning
14. Freezer conditioning
(Includes corrosion condi-
tioning, ribbed floor mat,
and wire mesh windshield)
15. EE Rating available on
SP 3520 and SP 3550H
16. Wire mesh screen (Standard
with freezer conditioning)
17. Retractable tether
18. Load wheel and drive
tire compounds
19. 30" lanyard boom
20. InfoLink™ Ready
21. Positive / negative
accessory cable
22. Special paint
23. Work Assist™ Accessories
• Clip pad and hook
• Plate
• Pocket
24. Fire extinguisher
Crown’s Access 1 2 3...
The Comprehensive Access 1 2 3
System Control is a modular
based communications and
control system. It monitors all
on-board sensors, makes
decisions based on the sensor
readings, and subsequently, con-
trols all system movements safely
and smoothly. All five modules are
in constant communications with
each other via a CAN (Control
Area Network) bus so that real
information is accessible to the
system at all times.
• Interactive Display Module
• Traction Control Module
• Vehicle Control Module
• Steering Control Module
• Guidance Control Module
Crown Drive System
Crown has applied the latest
generation AC drive system,
enhanced with Access 1 2 3
technology. A Crown-manufac-
tured drive unit uses spiral bevel
and helical gears from motor to
drive wheel axle.
Fixed, mounted drive motor does
not rotate minimizing wear on
electricall cables. Drive tire
changing is simplified with this
drive unit.
Crown’s AC Drive system dra-
matically improves travel speeds,
acceleration and deceleration,
thus increasing productivity.
The standard linear speed control
provides smooth travel speed
transition as lift heights change
and increases productivity.
SP 3500 Series
Technical Information