Snorkel A38E-sn User Manual
006001 +
PARTS & SERVICE
Part number 514252-200
March 2014
SERVICE & PARTS
MANUAL
A38E
Aerial Work Platform
Nameplate
The Serial Number of the Work
Platform is also stamped on the
inside of the Chassis, close to the
Steering Cylinder.
When contacting Snorkel for service or parts information, sure to include the MODEL and SERIAL
NUMBERS from the equipment nameplate.
The A38E work platform meets and exceeds the requirements of both:
En280:2001 and ANSI A92.5 (1992)
iA38E Work Platform
WARNING
U
p
R
i
g
h
t
A
B
3
8
C
All personnel shall carefully read, understand and follow all safety rules and operating
instructions before operating or performing maintenance on any Snorkel aerial work platform.
Safety Rules
Electrocution Hazard Tip Over Hazard
THIS MACHINE IS NOT
INSULATED!
NEVER elevate the platform or drive
the machine while elevated unless
the machine is on a firm, level
surface.
ollision Hazard Fall Hazard
NEVER position the platform
without first checking for overhead
obstructions or other hazards.
NEVER climb, stand, or sit on
platform guardrails or midrail.
USE OF THE AERIAL WORK PLATFORM: This aerial work platform is intended to lift persons and his tools as well as the material
used for the job. It is designed for repair and assembly jobs and assignments at overhead workplaces (ceilings, cranes, roof structures, buildings etc.). All other uses of the aerial work platform are prohibited!
THIS AERIAL WORK PLATFORM IS NOT INSULATED! For this reason it is imperative to keep a
safe distance from live parts of
electrical equipment!
NEVER get closer than the minimum distance recommended by your National Regulations.
Exceeding the specified permissible maximum load is prohibited! See “Platform Capacity” for details.
The use and operation of the aerial work platform as a lifting tool or a crane is prohibited!
NEVER exceed the manual force allowed for this machine. See “Manual Force” for details.
DISTRIBUTE all platform loads evenly on the platform.
NEVER operate the machine without first surveying the work area for surface hazards such as holes, drop-offs, bumps, curbs, or
debris; and avoiding them.
OPERATE machine only on surfaces capable of
supporting wheel loads.
NEVER operate the machine when wind speeds exceed this machine’s wind rating. “Beaufort Scale” for details.
IN CASE OF EMERGENCY push EMERGENCY STOP switch to deactivate all powered functions.
IF ALARM SOUNDS while platform is elevated, STOP, carefully lower platform. Move machine to a firm, level surface.
Climbing up the railing of the platform, standing on or stepping from the platform onto buildings, steel or prefab concrete structures,
etc., is prohibited!
Dismantling the entry gate or other railing components is prohibited! Always make certain that the entry gate is closed and securely
locked!
It is prohibited to keep the entry gate in an open position when the platform is raised!
To extend the height or the range by placing of ladders, scaffolds or similar devices on
the platform is prohibited!
NEVER perform service on machine while platform is elevated without blocking elevating assembly.
INSPECT the machine thoroughly for cracked welds, loose or missing hardware, hydraulic leaks, loose wire connections, and dam-
aged cables or hoses before using.
VERIFY that all labels are in place and legible before using.
NEVER use a machine that is damaged, not functioning properly, or has damaged or missing labels.
To bypass any safety equipment is prohibited and presents a danger for the persons on the aerial work platform and in its working
range.
NEVER charge batteries near sparks or open flame. Charging batteries emit explosive hydrogen
gas.
Modifications to the aerial work platform are prohibited or permissible only at the approval by Snorkel .
AFTER USE, secure the work platform from unauthorized use by turning the keyswitch off and removing key.
The driving of MEWP’s on the public highway is subject to regulations made under the Road Traffic Acts.
ALWAYS use a full body harness, prior to raising the platform, as recommended by the Health and Safety Executive (H1/05/05)
ii A38E Work Platform
Harness attachment points are provided in the platform and the manufacturer recommends the usage of a fall
Safety Rules
restraint harness, especially where required by national safety regulations.
All harness attachment points on SNORKEL vehicles have been tested with a force of 3,650 lbs (16.3 KN)
per person.
See below examples of harness attachment points used on SNORKEL vehicles with their corrosponding rating;
Harness attachment point Type 1. is rated for one
lanyard attachment per loop as shown in the
illustrations depending upon platform occupancy rating
(see operators manual & decals).
Top View Top View
Top View
Type 1.
Type 2.
2 lanyard
attachments
Harness attachment point Type 2. is rated for two
lanyard attachments per loop as shown in the
illustrations depending upon platform occupancy rating
(see operators manual & decals).
Top View
2 lanyard
attachments
Harness attachment point Type 3. is rated for one
lanyard attachment per loop as shown in the
illustrations depending upon platform occupancy rating
(see operators manual & decals).
Front View
1 lanyard
attachment
Top View
1 lanyard
attachment
1 lanyard
attachment
Type 3.
Harness attachment point Type 4. is rated for one
lanyard attachment per loop as shown in the
illustrations depending upon platform occupancy rating
(see operators manual & decals).
1 lanyard
attachment
Type 4.
NOTE: There can be more harness attachment points per machine than the
maximum number of occupants allowed in a platform. Refer to
the platform decal & specifications table listed in the operators
manual for the correct occupancy rating before use.
iiiA38E Work Platform
NOTES:
iv A38E Work Platform
Foreword
Introduction
HOW TO USE THIS MANUAL
This manual is divided into 7 Sections,
The right hand pages of each Section is marked with a black
section number printed at the top corner of each page which
can be used as a quick guide.
SPECIAL INFORMATION
D A N G E R
Indicates an imminently hazardous situation which, if not avoided, will
result in severe injury or death.
W A R N I N G
Indicates a potentially hazardous situation which, if not avoided, could
result in severe injury or death.
C A U T I O N
Indicates a potentially hazardous sit uation which, if not avoided, may
result in minor or moderate injury.
General Description & Machine Specifications.
Information on the preparation for use, shipment,
Introduction &
Specifications
Machine Preparation
forklifting, transporting and storage.
Operation
Operating Instructions & Safety Rules.
1.0
2.0
3.0
WORKSHOP PROCEDURES
C A U T I O N
Detailed descriptions of standard workshop
procedures, safety principles and service operations
are not included. Please note that this manual does
contain warnings and cautions against some specific
service methods which could cause personal inju
could damage a machine and make it unsafe.
Please understand that these warnings cannot cover
all conceivable ways in which service, whether or not
recommended by Snorkel, can be done, or the possible
hazardous consequences of each conceivable way,
nor could Snorkel investigate all ways. Anyone using
service procedures or tools, whether or not recom-
mended by Snorkel, must satisfy themselves
thoroughly that neither personal safety no
safety will beorjeopardised.
Notes: Give helpful information.
All information contained in this manual is based on the
t product information available at the time of printing.
lates
We reserve the right to make changes at any time without
notice. No part of this publication ma
stored in retrieval system, or transmitted, in any form by
any means, electronic, mechanical, photocopying,
recording, or otherwise, without prior written permission of
the publisher. This includes text, figures and tables.
y be reproduced,
ry,
r machine
Maintenance
Preventative Maintenance & Service Intervals.
Troubleshooting
Causes of and Solutions to typical problems.
Schematics
Schematics and Valve Block Diagram with
description and location of components.
Illustrated Parts
4.0
5.0
6.0
Breakdown
Complete parts lists with illustrations.
7.0
vA38E Work Platform
NOTES:
Foreword
vi A38E Work Platform
Section
No.
Contents
Table of Contents
Page
No.
Section
No.
Section
i
Page
No.
1.0 Introduction & Specifications
1.0 Introduction ........................................................ 1-1
Purpose ..........................................................1-1
Scope ..............................................................1-1
1.1 General Information .......................................... 1-1
Platform ..........................................................1-1
Control Box ....................................................1-1
Elevating Assembly ..................................... 1-1
Rotation Gear ................................................ 1-1
Drive & Steer Systems .................................1-2
Power System ................................................1-2
Control System ............................................. 1-2
Chassis ...........................................................1-2
A38E Purpose & Limitations ...................... 1-2
1.2 Specifications ..................................................... 1-3
1.3 Notes .....................................................................1-4
2.0 Machine Preparation
2.1 Preparation For Use ......................................... 2-1
2.2 Preparation For Shipment ............................... 2-1
2.3 Forklifting The Work Platform ........................ 2-1
2.4 Lifting The Work Platform ................................ 2-1
2.5 Transport by Truck .............................................2-1
2.6 Manual Brake Release ......................................2-2
2.7 Storage .................................................................2-2
2.8 Notes .....................................................................2-3
3.0 Operation
3.0 Introduction ........................................................ 3-1
General Functioning .....................................3-1
Driving ........................................................... 3-1
Steering .......................................................... 3-1
Operating the Booms ...................................3-1
Design Features ............................................3-2
3.1 Safety Rules & Precautions ............................. 3-3
3.2 Controls & Indicators .......................................3-4
3.3 Pre-Operation Inspection .................................3-6
System Function Inspection .......................3-6
3.4 Opertaion ............................................................ 3-7
Elevating & Lowering
A38E Work Platform ................................. 3-7
Travel With The Work Platform
Lowered ..................................................... 3-7
Travel With The Work Platform
Elevated ..................................................... 3-8
Levelling ........................................................ 3-8
Emergency Situations &
Emergency Override .................................3-8
Emergency Lowering ......................3-8
Control From Ground Level ........................ 3-9
After Use Each Day ..................................... 3-9
Manual Rotation ...........................................3-9
Manual Telescopic Retraction ....................3-9
3.5 Notes .....................................................................3-11
The
4.0 Maintenance
4.0 Introduction ........................................................ 4-1
Tools Required ..............................................4-1
4.1 Preventative Maintenance ............................... 4-1
Preventative Maintenance
Table Key ....................................................4-2
Preventative Maintenance
Report ..........................................................4-2
4.2 Battery Maintenance .........................................4-3
Battery Inspection & Cleaning ...................4-3
Battery Charging .......................................... 4-3
Battery Cell Equalization ............................. 4-4
4.3 Temperature Correction For
Electrolyte Readings ......................................4-4
4.4 Lubrication ......................................................... 4-5
Grease Fittings .............................................. 4-5
Slew Ring .......................................................4-5
Pivot Pins .......................................................4-5
Hydraulic Oil Tank & Filter ......................... 4-5
4.5 Setting Hydraulic Pressures ............................ 4-6
Main Relief Valve ..........................................4-6
Slew Cross-Line Relief Valve ...................... 4-7
4.6 Maintenance on Elevating Assembly ............. 4-7
Installation of Elevating Assembly
Support ......................................................
Removal of Elevating Assembly
Support ....................................................... 4-7
4.7 Switch Adjustments ............................................ 4-8
Tilt Sensor ..................................................... 4-8
Boom Rest Limit Switch ... ...........................4-8
4.8 Hydraulic Manifold ........................................... 4-10
Removal ......................................................... 4-10
Disassembly ..................................................4-10
Cleaning & Inspection .................................4-10
Assembly .......................................................4-10
Installation .....................................................4-10
4.9 Hydraulic Pump ................................................. 4-12
Removal ......................................................... 4-12
Installation .....................................................4-12
4.10 Traction Motor Maintenance .......................... 4-12
Inspecting the Drive Motor ........................4-12
4.11 Electric Motor .................................................... 4-14
Troubleshooting ...........................................4-14
Disassembley ................................................ 4-14
Inspection ......................................................4-14
Reassembley ................................................. 4-14
Maintenance Intervals & Procedures ....... 4-15
4.12 Drive Reduction Gearbox .................................4-17
Changing the Oil ...........................................4-18
4.13 Torque Specifications ........................................4-18
4.14 Lower Lift Cylinder ............................................4-19
Removal ......................................................... 4-19
Disassembly ..................................................4-19
Cleaning & Inspection .................................4-19
Reassembly/Seal Replacement ...................4-20
.4-
7
IA38E Work Platform
Section
i
Sect ion
No.
Contents
Table of Contents
Page
No.
Sect ion
No.
Page
No.
Installation .....................................................4-20
4.15 Upper Lift Cylinder ............................................4-21
Removal ......................................................... 4-21
Disassembly ..................................................4-21
Cleaning & Inspection .................................4-21
Reassembly/Seal Replacement ................... 4-21
Installation ........................
4.16 Telescopic Cylinder ........................................... 4-22
Removal .........................................................4-22
Disassembly ..................................................4-23
Cleaning & Inspection .................................4-23
Reassembly/Seal Replacement ................... 4-23
Installation .....................................................4-23
4.17 Steering Cylinder ........
Removal .........................................................4-23
Disassembly ..................................................4-23
Cleaning & Inspection .................................4-24
Reassembly/Seal Replacement ................... 4-24
Installation .....................................................4-24
4.18 Master Levelling Cylinder ............................... 4-25
Removal ..............................
Disassembly ..................................................4-25
Cleaning & Inspection .................................4-25
Reassembly/Seal Replacement ................... 4-25
Installation .....................................................4-25
4.19 Slave Levelling Cylinder ..................................4-26
Removal ......................................................... 4-26
Disassembly .............................
Cleaning & Inspection .................................4-26
Reassembly/Seal Replacement ................... 4-26
Installation .....................................................4-27
Bleeding the Master/Slave
Levelling Circuit ........................................4-27
4.20 Adjustment Of Overcentre Valves .................... 4-28
4.21 Replacing GP400 control module ....................4-29
4.22 Calibration of load cell ...................................4-30
.............................4-22
.......................................4-23
........................... 4-25
.....................4-26
5.0 Troubleshooting
7.0 Illustrated Parts Breakdown
7.0 Introduction ........................................................7-1
7.1 Index ..............
7.2 Illustrated Parts Breakdown .......................... 7-2
F inal Assembly A38E ................. ................................ 7-2
Chassis Ass embly .......................................................... 7-4
A38 PG Parts Assembly .................... ..... ....... .. ... .......... 7-6
Booms and Posts Assembly ..... .......... ............ ..... .......... 7-8
Cage and Cradle Assembly.................................................... 7-
Cage and Cradle Assembly (Rotator) ................................... 7-
Wheel Hub Assembly .......................................................... 7-
Drive Reduction Gear box Assembly .................................. 7-
Traction Motor Assembly (514274-000)............................. 7-
Traction Motor Assembly (512944-000).............................
Motor / Pump Assembly..................................................
Re ar & Front Wheel Kit .................................................
Worm Drive Unit & Slew Bearing.......................................
Manifold
Lower Lift Cylinde r Assembly.............................................
Upper Lift Cylinder Assembly ............................................
Telescopic Cylinder Assembly.............................................
St eeri ng Cylinder Assembly................................................
Master / Slave Cylinder Assembly......................................
Lower Control Box Assembly ............................................ 7-
Upper Control Box Assembly (CE)..................................... 7-
Upper Control Box Assembly (ANSI).................................
Cables & Electrical Components..........................................
Hose Ass embly...................................................................
Decal Kit - ANSI Version ...............................................
Decal Kit - CE Version ....................................................
Options List ..........................................................................
Block Assem
....................................................... 7-1
bly ...............................................
77-
7-
77-
7-
7-
77-
7-
7-
77-
7-
7-52
7-54
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
5.0 Introduction ........................................................5-1
General Procedure ........................................ 5-1
Special Tools .... ............................................ 5-2
Adjustment Procedures .......... ..................... 5-2
Checking Pump Preasure...............................5-2
Diagnostics using Ezcal display......... .......... 5-2
5.1 Troubleshooting Guides ....... .................... 5-4
5.2
I/O Matrix ..................................................... 5-3
Replacing the GP400 Control module ....... 5-6
GP400 I/O Allocations...............................
Notes ........................................................
5-7
5-8
6.0 Schematics
6.0 Introduction ........................................................6-1
6.1 Electrical Schematics ........................................6-3
6.2 Hydraulic Schematics ....................................... 6-6
II A38E Work Platform
NOTES:
Contents
Section
i
IIIA38E Work Platform
Section
i
NOTES:
Contents
IV A38E Work Platform
Introduction & Specifications
Section
1.0
1.0 Introduction
PURPOSE
The purpose of this Service & Parts Manual is to
provide instructions and illustrations for the operation
and maintenance of the A38E Work Platform
manufactured by Snorkel. (See Figure 1-1).
SCOPE
The manual includes the procedures and
responsibilities which must be strictly adhered to for
proper operation, maintenance, adjustment, and
repair of this product. The Maintenance Section
further covers preventative maintenance and trouble
shooting.
1.1 General Information
The A38E is a quickly deployable self propelled aerial
work platform, designed to raise a specified number
of operators with hand tools to a work height of up
to 13.45 m (44.12ft.) i.e. a platform floor height of
11.45 m (37.56 ft.). It is designed to provide mobility
with the Platform in the raised or lowered position,
although travel with the Platform raised is limited to
a low speed. The boom assembly and telescope
functions are operated by a hydraulic pump driven
by a DC electric motor. Two DC electric traction
motors coupled to two braked gearboxes regulate
the drive function.
CONTROL BOX
The control box is permanently fitted at the front
centre of the platform. It features a Joystick which
will provide proportional control for raising or
lowering either of the
retracting the Telescopic Boom, rotating (slewing)
the entire Booms & Posts Assembly or driving.
A safety feature which is incorporated into the
Joystick’s operation is the Interlock Switch. This
must be activated at all times while operation is
required. This allows for one-handed operation. A
complete explanation of control functions can be
found in Section 3.
two booms, extending or
ELEVATING ASSEMBLY
The platform is raised and lowered by a combination
of two steel lift booms and one telescopic boo
each of which is operated by a hydraulic cylinder
which in turn is actuated by hydraulic power from the
motor driven pump. Solenoid operated valves control
to which cylinder the hydraulic oil is directed. Each
cylinder features an integral holding valve to prevent
uncontrolled descent in the case of a hose burst.
m,
ROTATION GEAR
The Booms & Posts Assembly can be rotated to
provide up to 5.6 m (18.4 ft.) of side outreach,
measured from the centreline of rotation to the front
of the Platform. This is do
hydraulic motor driving a Worm Drive Unit, around a
large diameter Slew Gear.
1.
ne by means of an integral
6.
2.
PLATFORM
The platform is large enough for a specified number
of operators and has a free-draining perforated floor
with 150 mm (5.9inches) toe boards. Hand rails are
constructed from steel tubing and a safety drop-bar is
provided at the entrance. Safety harness anchor points
are also fitted in the floor of the platform. The primary
Control Box is fitted permanently within this platform.
W A R N I N G
DO NOT begin using the machine until the
platform entrance drop bar is in the fully
lowered position.
7.
1. Pl atform
2. Elevating Assembly
3. Chassis
4. Power Module
5. Control Module
6. Platform Control Box
7. Lower Control Box
Figure 1-1: A38E Work Platform
5.
3.4.
1-1A38E Work Platform
Section
1.1
Introduction & Specifications
DRIVE & STEER SYSTEMS
The A38E Work Platform is restricted to low speed
drive when the Platform is raised above the Boom
Rest Limit Switch. The Traction controller controls the
application of drive from the Joystick by means of two
ction Motors, which are assembled to the drive
Tra
wheels via a Drive Reduction Gearbox.
Steering of the A38E Work Platform is controlled by
a double acting cylinder. An Operator can Steer left
or right by depressing the Rocker Switches on top of
the Joystick, while activating the Interlock Switch.
POWER SYSTEM
The power system incorporates eight 6V batteries
driving the drive traction motors, or the 4kW (5.4HP)
electric motor which in turn drives the hydraulic
pump. The application of this hydraulic pressure is
performed by the Control System.
CONTROL SYSTEM
The machine is provided with fully proportional
controls by means of the interaction between a
P600, electron tor om ci contro l a dna rel proportional
joystick. The P600 and motor controller regulate the
drive motor/pump speed and hence the flow of oil
reaching the cylinders, the Worm Drive Unit or the
Drive Reduction Gearbox. It regulates the direction of
flow of the hydraulic oil via the solenoid valves located
on the manifold block, and it also monitors the operation of all switches on the machine via the machine
harness system.
The motor control units are located, in the left hand
chassis mo
hydraulic tank. This is accessible by removing the
main cover.
dule. The manifold block is located on the
A38E PURPOSE & LIMITATIONS
The purpose of the A38E work platform is to provide a
quickly deployable variable height work platform. It is
capable of lifting a specified number of people with work
tools up to an upper limit of 215 kg (ANSI 475 lbs) in
total. The unit will provide the ability to reach over
obstacles but must be used on firm level ground.
See Specification table on page 1-3.
The platform must only be used on firm level or slightly
uneven ground capable of supporting the maximum load
generated under the four wheels. Do not use on soft or
severely sloping ground.
DANGER
NOTE: It should be recognised that if the tilt
switch senses a degree of slope greater than
3º the elevating circuits will lockout and
sound a warning alarm. The Emergency
Override should then be used, to lower the
Elevating Assembly.
CHASSIS
The chassis is a structural frame designed to support
all the components of the A38E Work Platform.
1-2 A38E Work Platform
Introduction & Specifications
1.2 Specifications
ITEM METRIC IMPERIAL (ANSI)
Duty Cycle 45% of 8 hour shift 45% of 8 hour shift
Platform Size
Max. Platform Capacity 2
Indoors
Outdoors
Maximum Working Height
Maximum Platform Height
Min. Platform Floor Height
Max. Working Outreach
Platform Height At
Maximum Outreach
Stowed Dimensions
Length
Width
Height
Ground Clearance 0.12 m 0.39 ft
heel Base x Gauge 2.00 m x 1.27 m 6.56 ft x 4.16 ft
W
Rotation
Unloaded Weight
With Load/ Max Weight
Drive Speed Stowed 0 - 4 km/h 0 - 2.49 mph
Drive Speed Elevated
Maximum Gradeability 36% 36%
Inside Turning Radius
Outside Turning Radius 2.40 m 7.87 ft
Power Source
System Voltage Control 12V 12V
Battery Charger
Hydraulic Oil Tank Capacity
Max. Hydraulic Pressure
Hydraulic Oil Grade
Cylinder Types
Control System
Wheels/Tyres
Braking
Table 1-1: Specifications
0.58 m x 1.3 m (inside gaurdrails) 1.77 ft x 4.3 ft (inside gaurdrails)
15 kg 475 lbs
2 People 2 People
1 People
13.45 m
11.45 m
0.65 m
6.10 m 20.00 ft
5.40 m 17.72 ft
4.04 m
1.50 m
2.00 m
362 degrees non-continuous 362 degrees non-continuous
3,770 kg 7
3,985kg 8,840 lbs
0 - 0.4 km/h 0 - 0.25 mph
0.40 m 1.31 ft
48V DC 4kW, 8 X 6V 210Ah Batteries 48V DC 5.4HP, 8 X 6V 210Ah Batteries
Auto Dual AC input 100-240V ~ 50/60Hz 18A
Output 48V, 25A
25 Litres 6.5 Gallons US
145 bar 2105 psi
ISO #46 ISO #46
2 Double Acting Lift Cylinders With
Lock Valves And Manual Emergency
Lowering Facility.
1 Double ActingTelescopic Cylinder
Refer to Section 5 of the Service &
Parts Manual
One handed Proportional Joystick
Operating Energy Efficient Motor
Control System
400 mm Diameter Steel Disc Wheel
With Solid All Surface Tyres
Automatic Spring Applied
Hydraulic Release
Auto Dual AC input 100-240V ~ 50/60Hz 18A
Output 48V, 25A
2 Double Acting Lift Cylinders With
Lock Valves And Manual Emergency
1 Double ActingTelescopic Cylinder
Refer to Section 5 of the Service &
One handed Proportional Joystick
Operatin
15.75 inch Diameter Steel Disc Wheel
With Solid All Surface Tyres
Automatic Spring Applied
2 People
44.12 ft
37.56 ft
2.13ft
13.25 ft
4.92 ft
6.56 ft
,826 lbs
Lowering Facility.
Parts Manual
g Energy Efficient Motor
Control System
Hydraulic Release
Section
1.2
Max Noise Lev el
69.5 dB(A) 69.5 dB(A)
1-3A38E Work Platform
Section
1.3
NOTES:
Introduction & Specifications
1-4 A38E Work Platform
Machine Preparation
2.1 Preparation for use
CAUTION
Read, understand and follow all operating
instructions before attempting to operate the
machine.
2.2 Preparation for Shipment
1. Lubricate machine per lubrication instructions in
Section 4.4, Maintenance.
2. Fully lower the platform and make sure the
machine is stowed securely.
3. Check that the hydraulic oil level is adequate
and that it is not over filled.
Check that the batteries are charged and disconnect
the batteries usin
This prevents excessive power drain prior to next
using the machine.
g the Battery Disconnect Plug.
FORKLIFT
HERE
Section
2.1
Front Lifting /
Tie-down Lug
2.3 Forklifting the Work Platform
CAUTION
The A38E is not designed to be consistently
forklifted. This operation can be used for very
short distances only.
Forklift from the side by lifting under the chassis
modules as per Figure 2-1. When lifting the A38E
with a forklift, great care should be taken not to
damage the right or left hand modules as these
contain sensitive equipment.
2.4 Lifting the Work Platform
CAUTION
See specifications (Section 1.2) for the
weight of the work platform and be certain
tha
t lifting apparatus is of adequate capacity
to lift the platform.
The A38E may be lifted by an overhead hoist/crane in
the following manner:
Four lifting straps capable of safely supporting the
total weight of the A38E ( (3,770 Kg /7,430 lbs CE
Rear Lifting /
Tie-down Lug
Figure 2-1: Forklifting & Lifting the A38E
Version & 4,010 Kg /8,840 lbs ANSI Version) and at
least 250 cm (8 ft.) long are required. This minimum
length is important to ensure the correct lifting an
The straps should be positioned at the Lifting/Tie
Down Lugs as shown in Figure 2-1. Great care must
be taken to avoid damage to any of the components
of the machine.
gle.
2.5 Transport by Truck
The A38E is normally carried upon a suitably rated
transportation vehicle. Because of the high
gradeability of the A38E it will be capable of driving
directly on to most vehicles. If however the loading
slope is greater than the gradeability or the batteries
have been depleted sufficiently a winch sho
used. The procedure when using a winch is to
disengage the gearbox from the drive wheels using
the Allen key release, and then winch the machine on
to the vehicle in its freewheel state.
Refer to Section 2.6 which follows.
uld be
2-1A38E Work Platform
Section
2.6
Machine Preparation
When the A38E is on the Truck it should then be
made secure.
1. Chock the wheels of the A38E.
2. Secure the work platform to the transport
vehicle with chains or straps of adequate load
capacity attached to the lifting lugs on the
chassis.
CAUTION
Overtightening of the chains or straps through
tie down lugs may result in damage to the
Work Platform.
2.6 Manual Brake Release
CAUTION
Perform this operation only when the machine
will not operate under its own power and it is
necessary to move the mach
winching onto a trailer for transportation.
Ensure the machine is on level ground before
commencing this operation and use wheel
chocks as appropriate to prevent the machine
from rolling inadvertently.
Do not exceed 3 mph. Faster speeds will
damage drive components and void warranty.
1. Ensure that the Platform is fully lowered and
that the Elevating Assembly is slewed (rotated)
such that the platform is stowed above the drive
wheels. Turn the Upper Control Box to the OFF
tion and remove the key.
posi
2. Attach a chain/cable of sufficient capacity for
towing the machine to the front or rear lifting/tie
down lugs. Take up the slack in the chain/cable.
3. Locate the Allen head socket screws located in
the centre of the two drive (rear) wheels and
using a 6 mm Allen key, turn each one
clockwise to its full extent. The machine is now
in freewheel mode.
WARNING
DO NOT leave the machine unattended or
attempt to operate the A38E Work Platform
until the Brake Rele
re-engaged.
ase Screws
ine, or for
have bee
n
4. When towing is completed, turn both Allen head
socket screws in a counter clockwise direction
until they rest firmly against the locking circlip.
Figure 2-2 : Manual Brake Release
2.7 Storage
No preparation is required for storage when the Work
Platform is in regular use. Regular maintenance per
Table 4-1 should be performed.
If the work platform is to be placed in long term
storage (dead storage) use the following preservation
procedure.
PRESERVATION
1. Clean painted surfaces. If the painted surface is
damaged, repaint.
2. Fill the hydraulic tank to operating level with the
platform fully lowered. Fluid should be visible
on the Di
hydraulic fluid be drained.
3. Coat exposed portions of cylinder rods with a
preservative such as multipurpose grease and
wrap with barrier material.
4. Coat all exposed unpainted metal surfaces with
preservative.
BATTERIES
1. Disconnect the batteries.
2. Disconnect the battery leads and secure to the
chassis.
Care should be taken, while disconnecting the
battery leads, that a short circuit does not occur.
i.e. grounding to the chassis with a
3. Remove the batteries and place in alternate
service. Battery efficiencies are best realised
when used consistently.
p Stick. It is not recommended that the
WARNING
spanner.
2-2 A38E Work Platform
NOTES:
Machine Preparation
Section
2.7
2-3A38E Work Platform
Section
2.7
NOTES:
Machine Preparation
2-4 A38E Work Platform
Operation
Section
3.0
3.0 Introduction
GENERAL FUNCTIONING
WARNING
Before beginning to operate the machine it is a
mandatory requirement to read, fully understand
and follow the Operators Manual.
The A38E Lift and Steer functions are operated by
utilising a battery powered electric motor which
drives a hydraulic pump. The pump supplies oil
under pressure to the various platform functions.
electrically activated solenoid valves (the control
of which solenoid valve activates and the rate at
electrical circuit, and its components).
The Drive function is operated by utilising two drive
motors which
Motor Controller.
NOTE:
An Interlock Trigger Switch is an integral part of the
Joystick. This must be depressed for the functions to
operate. This will energise the Line Contactor and enable
electrical control. (This safety feature prevents
inadvertent activation of all powered functions, in the
case of accidental movement of the Joystick.)
DRIVING
Platform controls provide variable speeds for the
drive function through the use of a Joystick. This is
achieved using a motor control unit which varies the
speed of the two DC electric traction motors. To drive
the A38E there are a number of steps which need be
taken. First the operator should ensure that neither of
the Emergency Stop Buttons are pressed, then the
Keyswitch on the ground control panel should be
turned to the
Momentarily operate the drive
the A38E will be able to drive.
The machin
to the angle of the Joy-
position, while the
depressed. The speed range within which the machine
will drive is deter-mined by whether or not the booms
are raised.
are controlled by a Electronic Traction
‘PLATFORM CONTROL’ position.
function switch and
e will then drive at a speed proportional
stick
from the neutral (centre)
Joystick Interlock Switch is
If a boom is raised off the Boom Rest Limit Switch
the current to the drive motors will be reduced leading
to a significantly slower drive speed. This is a safety
feature. The drive wheels are driven by two DC
electric traction motors coupled to two braked
gearboxes. When the Joystick is in the neutral
position the brake chamber is free of oil and the
internal spring within the gearbox maintains the
braking pressure. Upon moving the Joystick the
brake chambers will receive a flow of pressurised
oil which will release the brakes.
STEERING
Platform controls also provide a steering function
through the use of ‘Rocker’ activated Steering
Switches in the Joystick. This is achieved by using the
tla yb wolf ciluardyh eht seirav hci 006P wh ering
the voltage to the pump. To steer the A38E there are
a number of steps which need be
First the operator should ensure that neither of the
Emergency Stop Buttons are pressed, then the
Keyswitch ground control Panel should be turned to
‘PLATFORM CONTROL’ position.
the
Momentarily operate the drive function switch to drive
and the A38E will also be able to steer. To steer the
machine the Rocker should be pushed to the left or
the right, while the Joystick Interlock Switch is
depressed. Steering left or right will energise the
steering coils and allow oil to enter the full bore side
or annular side of the steering cylinder, there by
turning the wheels in the chosen direction. The
orientation of the Platform to the Chassis will
determine the direction the machine will travel when
the Joystick is engaged.
NOTE:
Steering is not self-centring. The wheels must be
returned to the straight ah
Steering Switch.
ead position by operating the
taken.
OPERATING THE BOOMS
Boom functions, including the telescopic and slewing
functions, can be operated either from the Platform
Controls or the Chassis Controls.
The Platform controls provide variable speeds for the
boom functions through the use of a Joystick. This is
deeps eht seirav hcihw 006P na gnisu deveihca
of the motor/pump unit and increases
the flow of oil to the different functions. This control
t receives a control signal from the Joystick on the
uni
upper controls, the speed of the motor will increase
as the Joystick is pushed further away from the
neutral (centre) position.
or decreases
3-1A38E Work Platform
Section
3.0
Operation
It will be noticed that on the Upper Control Box a set
of switches are used to alternate functions. Each
function will have it’s corresponding graphicand lamp.
This selector switch indicates to the Controller which
function is required and by using the Joystick the
speed of this selected function can be adjusted.
The boom functions on the chassis controls provide
proportional control for each function by way of an
analog rocker switch, the desired function can be
activated by holding on
controls and and operating the analog rocker, the
one of four switches on the
the four switchs act as both selector & enable
switches.
The use of these functions is further explained
throughout this Section.
DESIGN FEATURES
The A38E Series Work Platform has the following
features:
The drive speed is limited to a ‘creep speed’ when
operating the Work Platform while the machine is
elevated.
The energy-efficient motor control units provides
long battery life and smooth proportional control of
the boom and drive functions.
All cylinders are fitted with hydraulic hose-burst
protection interlocks.
The on-board charger is fully automatic and
charges the batteries efficiently and economically.
If the work platform starts to become unstable and
the Tilt Sensor is activated an alarm will sound in
the upper control box. In this situation power is
partially cut to the upper controls to prevent any
boom movements (i.e. UP, TELE OUT) that might
increase instability. An emergency override switch
is fitted to allow the booms to be lowered at a
controlled speed to bring the machine back to a
stable position.
In the event of a power loss the two Boom Lift
Cylinders are fitted with emergency lowering
valves which allow the booms to be lowered at a
controlled speed by an operator on the ground.
A Master Cylinder/Slave Cylinder levelling system
ensures that the Platform remains level throughout
the entire working cycle of the machine.
A manual rotation facility is fitted to allow rotation of
the Elevating Assembly in the event of power loss.
HOUR METER & BATTERY CHARGE
INDICATOR.
The A38E Series Work Platform is equiped with a
display in the chassis control panel which displays
total hours run & an Indication of remaining battery
charge.
LOAD SENSI NG
The A38E is fitted with a load sensing system designed to comply with the requirements of :
BS EN 280 : 2001
If a load equivelent to 99% of safe working load is
lifted an overload lamp will illuminate on the platform
control box.
If a load which is greater than the safe working load by
is present in the basket all machine functions will
10%
cease to operateand an acoustic warning will sound.
In order to return
les
s than the safe working load must be present in the
basket and
re-cycled by pushing the emergency stop button and
releasing it again.
to normal operation a load equal to or
the power must be re-cycled, power can be
3-2 A38E Work Platform
Operation
Section
3.1
3.1 Safety Rules and Precautions
WARNING
Before using the A38E Work Platform it is
imperative to read, understand and follow the
following Safety Rules and Precautions.
NEVER operate the machine unless you have been
fully trained in its safe use, are medically fit and have
read and fully understood these instructions.
NEVER leave the A38E unattended with the Platform
in the raised position.
ALWAYS position the machine on firm level ground
with a minimum bearing capacity of 78 kg /cm
(1109 psi).
CHECK that no
the machines range of movement.
DO NOT work within 3 metres (10 feet) of live
overhead cables. Set up warning tape barrier at the
safe distance.
(THIS MACHINE IS NOT INSULATED).
DO NOT exceed the safe working load of 215 kg,
(ANSI 475 lbs)
CE=max. 1 persons Outdoor + Tools 135Kg
2 person Indoor + Tools 55Kg
(ANSI=max. 2 person Indoor/Outdoor)
See specification table on page 1-3 .
overhead obstructions exist within
2
DO NOT use in winds exceeding 12.5 m/s (28 mph Beaufort Force 6)
NEVER change or modify operating or safety
systems.
INSPECT the machine thoroughly for cracked welds,
loose hardware, hydraulic leaks, damaged control
cable, loose wire connections and wheel bolts.
NEVER climb down an elevating assembly with
platform elevated.
NEVER perform service on or in the elevating
assembly while the platform is elevated without first
blocking the elevating assembly.
NEVER recharge batterie
flame; batteries under charge emit highly explosive
hydrogen gas.
SECURE the work platform against unauthorised use
by turning Keyswitch off and removing key from
switch.
NEVER replace any component or part with anything
other than original Snorkel replacement parts without
Snorkel’s consent.
NEVER leave the machine unattended while the
Gearbox Drive is disengaged.
s near sparks or open
NEVER sit, stand or climb on guard rail or midrail of
the platform.
NEVER use ladders or scaffolding on the platform.
DO NOT use the ma
application involving additional loads or forces. The
maximum side force must not exceed 200N
Outdoors / 400N Indoors, (ANSI = 90 ft. lbs).
DO NOT increase wind loadings by fitting items such
as sign boards, flags etc. to the cage or boom.
DISTRIBUTE all loads evenly on the platform. See
Table 1-1 for maximum platform load.
NEVER use damaged equipment. (Contact Snorkel
Ltd. for instructions).
NEVER attach overhanging loads or increase the
size
of the working platform.
chine as a crane or for any other
3-3A38E Work Platform
Section
3.2
Operation
3.2 Controls and Indicators
The controls and indicators for operation of the A38E
Work Platform are shown in Figures 3-1 & 3-2. The
name and function of each control and indicator are
listed in Tables 3-1. The index numbers in the figure
correspond to the index numbers in the table. The
operator should know the location of each
control and indicator and have a thorough
knowledge of the function and operation of each
before attempting to operate the unit.
Table 3-1: Controls and Indicators
Platform Controller*
INDEX NO. NAME FUNCTION
1 Emergency Stop Cuts all Platform control functions when pushed, twist to release.
2 Platform Level Operate switch and hold while using joystick to level the platform.
Note: Platform Cylinders will keep the platform level during normal operation, if the
Platform goes out of level over time this function will return the platform to level.
3 Upper Boom Operate switch to engage Upper Boom lift functions (Up & Down)
4
5 Drive Operate switch to engage Drive functions (Forward & Reverse)
6 Horn Operate switch and hold to sound
7 Slew (Rotate) Operate switch to engage Slew functions (Clockwise & Counter Clockwise)
Low Boom
Operate switch to engage Lower Boom lift functions (Up & Down)
the horn.
8 Warning Lamp Low battery warning lamp. Machine must be charged.
9 Telescope Operate switch to engage Telescope functions (Extend & Retract)
10
11
Joystick Depress deadman switch and select joystick forward or reverse to enable a selected
function.
Overload warning lampWarning Lamp
Chassis Control
INDEX NO. N
1
2 Upper Boom Operate switch and hold to engage and enable Upper Boom lift functions (up & down)
3 Lower Boom Operate switch and hold to engage and enable Lower Boom lift functions (up & down)
4
5 Telescope Operate switch and hold to engage and enable Telescope functions (extend & retract)
6
8 Display In normal operation displays battery life and hour run. Can also be used to display
AME FUNCTION
mergen
E
Slew (Rotate) Operate switch and hold to engage and enable Slew functions (clockwise & counter
Key Switch Turns the machine OFF/ON and selects Platform or Chassis controls
Rocker Switch Use with “enable” switches to activate the selected f un
cy Stop
Cuts
all m
Clockwise.
diagnostics.
achine functions
ction7
Note:
Yellow and Blue direction arrows are included on the Control Panel to show the operator which way each
function will move when the joystick is moved in a particular direction.
3-4 A38E Work Platform
Operation
CUTOUT
CUTOUT
CUTOUT
CUTOUT
CUTOUT
CUTOUT
Section
3.2
(CE)
4 4
3
1
7
6
11 8
2
5 109
1
512937-000
6
9
8
7 5 10
23
(ANSI)
3
1
6
0
8
512940-000
2
5
4
7
Figure 3-1: Controls & Indicators
3-5A38E Work Platform
Section
3.3
Operation
3.3 Pre-Operation Inspection
W A R N I N G
Carefully read, understand and follow all
safety rules and operating instructions.
Perform the following steps each day before
use. DO NOT perform service on Work
Platform with the platform elevated unless the
elevating assembly is properly supported.
1. Remove module covers and inspect for
damage, oil leaks or missing parts.
2. Check the level of the hydraulic oil with the
platform fully lowered and the Telescopic Boom
fully retracted. Oil should be visible on the filler
cap dip stick. If ne
No. 46 hydraulic oil.
3. Check that the electrolyte level in the batteries
is correct. (Battery Maintenance, Section 4.3)
4. Verify batteries are charged.
5. Check that the A.C. extension cord has been
disconnected from charger.
6. Carefully inspect the entire machine for
damage such as cracked welds or structural
members, loose or missing parts, oil leaks,
damaged cables or hoses, loose connections
and tyre damage.
7. Move machine, if necessary, to unobstructed
are
a where machine can be fully elevat
8. Visually inspect the cylinders, hoses and cables
for damage. Check for missing or loose parts.
cessary top-up using ISO
ed.
15. Operate the manual telescopic retraction
system using the Handpump to test that it will
work. (Not required on
16. LOWER each boom until the Elevating
is fully stowed. Turn Keyswitch on the Lower
ANSI machines).
Assembly
Control box to the ‘LOWER CONTROL SELECTION’.
Climb into the
Platform and check that the
Platform is level.
If not adjust as shown in
Section of this manual. Repeat all the above
tests from the Platform Controls. Push the
Emergency Stop Button to identify that
functions will indeed cease when depressed.
Bring the machine back to the stowed position
and retract the Telescopic Cylinder.
17. PRESS the Service Horn to see that it is
operational
pressing the Joystick Interlock Switch slowly
PUSH the Joystick to DRIVE FORWARD, and
then PULL to DRIVE REVERSE, to check for
speed and proportional control. The farther you
push or pull the Joystick the faster the machine
will travel.
18. PUSH the Steering Switch RIGHT and then
LEFT to check for steering control.
19. RAISE the Elevating Assembly until the Boom
Rest Limit Switch is no longer activated and
then repeat the Drive Fun
speed (‘CREEP SPEED’) should be available.
The System Function Inspection is then complete.
. Select the DRIVE function. While
W A R N I N G
the Platform Levelling
ction test. Only low
SYSTEM FUNCTION INSPECTION
9. Turn both Chassis and Platform Emergency
Stop switches ON (rotate clockwise).
10. Turn Keyswitch on the Lower Control box to
the ‘LOWER CONTROL SELECTION’.
11. Using the chassis control switches, fully
ELEVATE Booms no. 1 & 2 and EXTEND the
Telescope.
12. SLEW the Elevating Assembly through 180
degrees in both directions.
13. Visually inspec
cage mounting/structure, lift cylinders, cables
and hoses for leaks, damage or erratic
operation. Check for missing or loose parts
such as nuts, bolts and circlips.
14. Test that the Emergency Lowering Valves on
each of the Lift Cylinders is operating correctly
as detailed in Section 3.4. PUSH the
Emergency Stop Button to identify that
functions will indeed cease when depressed.
t the elevating assembly and
If there are any concerns about the safe use
or operation of the A38E following this
Pre-Ope
ration Inspection DO NOT USE
THE A38E WORK PLATFORM. Contact your
supplier or Snorkel’s Product Support
Department.
3-6 A38E Work Platform
Operation
Section
3.4
3.4 Operation
NOTE: Before operating the A38E Work Platform
it is imperative that the Pre-Operation Inspection
(Section 3.3) has been completed and any
deficiencies have been corrected. The operator
must also understand the functions of all the
controls before operating the machine.
ELEVATING & LOWERING THE A38E
WORK PLATFORM
Before beginning any operation involving the Elevating
Assembly the following checks should be carried out.
When the A38E has been thoroughly inspected the
elevating assembly can then be used.
W A R N I N G
LOOK up and around for obstructions before
performing the lift function.
ENSURE that the Elevating Assembly is
clear of the Chassis before engaging the
Slew operation.
DO NOT overload the platform
DO NOT operate within 3 metres (10 feet) of
any electrical power cables. THIS WORK
PLATFORM IS NOT INSULATED.
Cordon off the area within the platform’s
working area to keep passers-by clear of
the booms.
NOTE: Chas
1. Ensure the ‘CONTROL SELECTION KEYSWITCH’
is selected to ‘UPPER CONTROL’ and
emergency stop buttons are released (twisted clock-
wise).
Enter Platform through the entrance at the side
2.
of the A38E and ensure that the drop bar is in
the lowered position. Lock the Entry Step in the
raised position.
3. Before using the machine all local Safety
Regulations involving helmets and restraining
devices should be observed. Safety harness
lanyards, not exceeding 1 m (3 ft.) in length,
should be attached to anchor points in cage
floor.
4. Select “ LOWER BOOM ” on function selector
switch.Check for overhead obstructions and when
when satisfied squeeze the Joystick Interlock
control on.
sis controls are for service use only.
both
Slowly move the Joystick forwardto ELEVATE
the lower boom.
The further the joystick is moved, the faster.
the boom will move.
to
the Interlock at
required.
5. Select “UPPER BOOM ”, “TELESCOPE” or
“ROTATE” as required using the ‘Function
Selector Switches’ and operate as described
above. For boom functions the controls will
again be forward for UP and backward for
DOWN.
6. To rotate (SLEW) RIGHT the Controller
Joystick should be moved forward. Conversel
to rotate (SLEW) LEFT move the Controller
Joystick backward.
7. To ”TELESCOPE” IN the Controller Joystick
should be moved forward. Conversely to
”TELESCOPE” OUT move the Controller
Joystick backward.
8. Before lowering, check beneath the cage floor
for obstructions, operate as described above,
moving the Joystick back to lower the Booms.
Pressure must be applied
all times while operation is
TRAVEL WITH WORK PLATFORM
LOWERED
1. Verify that the chassis Emergency Stop Button
is in the
and that the Keyswitch is turned to the
‘UPPER CONTROL’position.
2. Climb into the Platform and check that the
Platform Emergency Stop Button is in the ‘ON’
position,
depressed. Ensure that the
lowered
3. Check that the route is clear of persons,
obstructions, pot holes or ledges and is capable
of supporting the wheel loads. Also, check that
the clearances above, below and to the side of
the Work Platform are sufficient.
4. Grasp the Joystick so that the Interlock Switch
is depressed (releasing this Interlock Switch will
cut power to the Joystick). Slowly push or pull
the Joystick to FORWARD or REVERSE to
travel in the desired direction. The farther you
push or pull the Joystick from the centre the
faster the machine will travel.
‘ON’ position (turn clockwise)
and that the Drive function button is
drop bar is in the
position.
y
3-7A38E Work Platform
Section
3.4
Operation
5. To “STEER” the A38E activate the Interlock
Switch while pushing the Steering Switch LEFT
or RIGHT to turn the wheels. Observe the tyres
while manoeuvring to ensure proper direction.
NOTE:
Steering is not self-centring. The wheels must be
returned to the straight ahead position by operating
the Steering Switch.
TRAVEL WITH WORK PLATFORM
ELEVATED
W A R N I N G
Travel with platform elevated ONLY on firm
and level surfaces. Platform motion is
exaggerated whil
surfaces.
NOTE:
The Work Platform will travel at reduced speed when
in the elevated position.
1. Check that the route is clear of persons,
obstructions, pot holes or ledges and is capable
of supporting the wheel loads. Also, check that
the clearances above, below and to the side of
the Work Platform are sufficient.
2. Operate the Drive function switch.
3. Grasp the Joystick so that the Interlock Switch
is depressed (releasing this Interlock Switc
cut power to the Joystick). Slowly push or pull
the Joystick to FORWARD or REVERSE to
travel in the desired direction. The farther you
push or pull the Joystick from the center the
faster the machine will travel.
e travelling on uneven
h will
C A U T I O N
If the machine comes to a halt and the Tilt
Alarm sounds, immediately lower the
Platform and move the machine to a level
location before re-elevating the Platform.
PLATFORM LEVELLING
NOTE:
The Levelling function will only
Rest Limit Switch has been activated i.e. when the
Booms are stowed.
work when the Boom
The platform can be levelled from the Upper controls
using the levelling function, oper d oh ld thena eta
levelling switchon the upper control box (see fig3-1)
while moving the joystick forward or back to level the
platform. The switch should be operated in short
bursts to level the platform slowly.
EMERGENCY SITUATIONS &
EMERGENCY OVERRIDE
In any emergency situation, the first action to be taken
should be to hit the red “Emergency Stop”
button for instant cutout of all functions. It will then be
required to twist the button clockwise, this releases
the cutout and the machine can be operated again.
If the audible Tilt warning alarm sounds, normal
control functions will cease to operate. This will
due to the following problem ;
the machine is out of level i.e. Tilt Sensor has
been activated.
In this situation the only machine
operate are descent functions, descend to the ground
in a controlled manner and cycle the power (push and
release the emergency stop) to restore all functions,
move the machine to a level surface and continue
with normal operation.
Note that during emergency operation, controls
will operate at a fixed, slow speed and will not
allow the raising or extending of the Booms.
The Booms can be lowered or retracted.
functions that will
be
EMERGENCY LOWERING
C A U T I O N
When operating this function, extreme care
must be taken to ensur
carrying out the task does not become
trapped by the structure. DO NOT climb
down the Elevating Assembly to operate
these valves.
Should the machine become inoperable when
elevated, request a person on the ground to lower the
platform using the emergency lowering valves.
These are red knobs (push type) mounted at the
base of the 2 Main Hydraulic Lift Cylinders (See
Figure 3-2).
Operate the lower boom first by pushing slowly.
The boom will descend slowly. The speed
is controlled by retaining pressure on the valve -
e that the person
of descent
3-8 A38E Work Platform
Operation
ens
ure a slow controlled rate of descent at all times.
Descent can be halted at any time by removing
pressure from the red knob.
Repeat the operation if necessary for the upper boom
when cylinder is in reach of the ground.
With both main booms lowered fully it should then be
possible to leave the platform safely.
Section
3.4
MANUAL ROTATION
1. Ensure booms are lowered as far as possible
using the emergency lowering valves, and that
the Emergency Stop Button is pressed to
prevent any accidental powered operation.
2. Apply a 7/8” socket wrench to shaft and turn to
rotate elevating assembly.
3. Remove wrench.
Before operating the Emergency
Lowering Valves the surrounding
area should first be cleared of any
potential obstructions. It is also
important that when the valve is
pushed, it is initially done slowly.
This is so that sudden movement
will not occur in the Elevating
Assembly, leading to a potentially
unstable machine.
Figure 3-2: Emergency Lowering
CONTROL FROM GROUND LEVEL
1. Chassis Controls are fitted at the base of the
Elevating Assembly. These should be used
when no operator is in the platform (for
maintenance/ service or inspection purposes),
or if the operator has become incapacitated.
For further information see Table 3-1.
2. Use the appropriate switch to raise or lower
Boom 1, Boom 2, Telescope or rotate as
required.
AFTER USE EACH DAY
1. Ensure that the platform is fully lowered.
2. Park the machine on level ground, preferably
undercover, secure against vandals, children or
unauthorised operation.
3. Turn key switch to OFF and remove key to
prevent unauthorised ope
4. Recharge batteries in accordance with
instructions in section 4.2.
ration.
the
To rotate the Elevating Assembly first apply a 7/8”
socket wrench to the shaft and turn to rotate the
Elevating Assembly. When finished remove the wrench.
Figure 3-3: Manual Rotation
MANUAL TELESCOPIC RETRACTION
(SEE FIGURE 3-4)
NOTE:
Manual Tele Retraction is not required, and
not provided for ANSI machines.
In the event of loss of electrical power the Telescopic
Cylinder can be retracted as follows:
1. Remove the cover from the chassis body.
2. The Handpump is attached to the Main Manifold
Block. Remove the Handpump Handle from the
clips on the side of the Chassis and insert into
the Handpump Valve as shown in Figure 3-4.
3. Operate handpump to retract
the tele cylinder.
4. After use replace the Handpump Handle in the
clips provided.
5. Reposition the cover on Chassis.
hence is
3-9A38E Work Platform
Section
3.4
Operation
Hand Pump
Valve
Hydraulic
Tank
Valve Block
Hand Pump
Handle
Figure 3-4: Manual Telescopic Retraction
3-10 A38E Work Platform
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