nifty SD Series Assembly instructions

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SD34T
Operating & Safety Instructions
MODEL SD34T SERIES
M50413/01
Niftylift Limited
32 Concourse Way
Greer
SC 29650
USA
www.niftylift.com
e-mail: [e-mail]
Tel: [phone]
Fax: [phone]

SD Series
Operating & Safety Instructions
USA 03/12
1
Table of Contents
1 INTRODUCTION AND GENERAL INFORMATION PAGE
1.1 Foreword 2
1.2 Scope 3
1.3 Introducing the SD34T Self Drive (SD) Series 3
1.4 General Specification 4
1.5 Identification 5-6
1.6 EC Declaration of Conformity 7
2 SAFETY
2.1 Mandatory Precautions 8-11
2.2 Environmental Limitations 11
2.3 Noise & Vibration 11
2.4 Test Report 12
3 PREPARATION AND INSPECTION
3.1 Unpacking 13
3.2 Preparation for Use 13
3.3 Pre-Operational Safety Check Schedules 14-15
3.4 Placard, Decals and Installation 16-17
3.5 Torque Requirements 18
4 OPERATION
4.1 Control Circuit Components 19-21
4.2 Setting up Procedures 22
4.3 Ground Control Operation 23-24
4.4 Basket Control Operation 25-27
4.5 Driving Controls 28
4.6 Batteries and Charging 29-31
4.7 Transporting, Towing, Craneage, Storage and Setting to Work 32-34
5 EMERGENCY CONTROLS
5.1 General 35
5.2 Emergency Procedures - Incapacitated Operator 35
5.3 Emergency Procedures - Machine Failure 35
5.4 Incident Notification 35
6 RESPONSIBILITIES
6.1 Changes in Ownership 36
6.2 Manual of Responsibilities 36
6.3 Inspection/Service/Pre-Hire Check List 37-38

SD Series
Operating & Safety Instructions
USA 03/12
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1 Introduction and General Information
1.1 FOREWORD
The purpose of these manuals is to provide the customer with proper safety operating and
maintenance instructions essential for proper machine operation.
All information in these manuals should be READ and fully UNDERSTOOD before any attempt is made
to operate the machine. THESE MANUALS ARE VERY IMPORTANT TOOLS - Keep them with the
machine at all times.
The manufacturer has no direct control over machine application and use, therefore
conformance with good safety practices is the responsibility of the user and his operating
personnel.
All information in these manuals is based on the use of the machine under proper operating
conditions. Alteration and/or modification of the machine are strictly forbidden.
One of the most important facts to remember is that any equipment is only as safe as those
who operate it.
DANGER, WARNING, CAUTION, IMPORTANT, INSTRUCTIONS AND NOTICE
Any place these topics may appear, either in this manual or on the machine, they are defined as
follows:
DANGER: If not correctly followed there is a high probability of serious injury or death to personnel.
WARNING OR CAUTION:If not correctly followed there is some possibility of serious injury or death to
personnel.
THE 'SAFETY ALERT' SYMBOL IS USED TO CALL ATTENTION TO POTENTIAL
HAZARDS WHICH MAY LEAD TO SERIOUS INJURY OR DEATH, IF IGNORED.
IMPORTANT AND INSTRUCTIONS: Denotes procedures essential to safe operation and
prevention of damage to or destruction of the machine.
NOTICE: Indicates general safety rules and/or procedures relating to the machine.
It is the owner's/user's responsibility to know and comply with all applicable rules,
regulations, laws, codes and any other requirements applicable to the safe use of this
equipment.

SD Series
Operating & Safety Instructions
USA 03/12
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1.2 SCOPE
These operating instructions contain all the necessary information required to allow the safe operation
of Niftylift SD34T, powered by electric (DC), diesel or gasoline engine, or a combination of these.
For further technical information, circuit diagrams and specific instructions for all maintenance which
may need to be carried out by specialist trained personnel, see the associated Workshop and Parts
manual for your model of machine.
1.3 INTRODUCING THE SD34T SELF DRIVE SERIES
Please note at the time of going to press all information, illustrations, details and descriptions contained
herein are valid. Niftylift reserves the right to change, alter, modify or improve its products without any
obligations to install them on previously manufactured machines.
If you require further information after reading this manual, please do not hesitate to contact us at your
nearest office.
Niftylift Inc, 32 Concourse Way, Greer, SC 29651 USA
Tel: [phone] Fax: [phone]
The Niftylift SD (Self Drive) is a range of extremely versatile articulating boom mounted via a 360º
powered swing mechanism. Driven from the basket, the Niftylift SD34T Self Drive accommodates up
to two men and their equipment, and offers a working height of up to 40ft or an outreach of 20ft with a
maximum capacity of 500lb.
High traction tyres and hydraulic wheel motors give 45% gradeability for this model. Automatic braking
and audible alarms activated by tilt sensor help to prevent the operator from working on unsafe terrain.
The outriggers make a swift set up possible and minimise the weight of the machine. A unique
pressure sensitive micro switch system fitted to each outrigger prevents operation of the machine until
all outriggers have been correctly deployed and also provides a loud audible alarm warning of a
possible hazardous situation
A simple, all-hydraulic proportional control system gives smooth, reliable movement of the basket and
maximum reliability in the harshest environments.
The Niftylift Self Drive provides a fast, safe, cost effective method of access, both inside and out, for a
multitude of applications where overhead working is required.
Models Include the Following:-
E: - D.C. ELECTRIC BE: - BI-ENERGY (DIESEL & BATTERY)
D: - DIESEL GE: - GASOLINE & BATTERY
G: - GASOLINE

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Operating & Safety Instructions
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1.4 GENERAL SPECIFICATION
FEATURE SD34T
MAXIMUM HEIGHT -WORKING 40ft
MAXIMUM HEIGHT - BASKET 33ft 6in
MAXIMUM HEIGHT - STOWED 6ft 7in
MAXIMUM OUTREACH 20ft
MAXIMUM WIDTH 5ft 3in
MAXIMUM LENGTH - STOWED 12ft 10in
MAXIMUM CAPACITY 500lb
TURRET ROTATION 406º
TURRET TAILSWING Zero
BASKET SIZE - LENGTH x WIDTH 25in x 44in
CONTROLS Full proportional hydraulic
HYDRAULIC PRESSURE 2900psi
GRADEABILITY 45%
TRAVEL SPEEDS 2.5mph
GROUND CLEARANCE 6in
GROSS VEHICLE WEIGHT 4980lb
MAXIMUM GROUND PRESSURE 0.049kN/cm2
10210lb/ft2
POWER OPTIONS E (Electric) models - 4 x 6v 250 AH batteries
G Gasoline models - Honda Engine
D (Diesel) models - Kubota 722 (4WD)

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1.5 IDENTIFICATION (USA PLATE)
This manufacturer’s plate is attached to Boom 1 on each machine at the time of manufacture
on every Niftylift. Please ensure all sections have been stamped and are legible.
Electrical and hydraulic circuits: See drawings listed on the bottom of the machine
nameplate for exact drawing number and issue relating to the machine build.

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Operating & Safety Instructions
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1.6 EC DECLARATION OF CONFORMITY (Typical)

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Operating & Safety Instructions
USA 03/12
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2 Safety
2.1 MANDATORY PRECAUTIONS
When operating your Niftylift, your safety is of utmost concern. In order to fully appreciate all aspects
of the machines operation it should be ensured that each operator has READ and fully UNDERSTOOD
the relevant manual covering machine use, maintenance and servicing. If any doubts exist concerning
any points covered in your manual, contact your local dealer or Niftylift Ltd.
Before using any Niftylift, thoroughly inspect the machine for damage or deformation to all major
components. Likewise, check the control systems for hydraulic leaks, damaged hoses, cable faults or
loose covers to electrical components. At no time should damaged or faulty equipment be used -
Correct all defects before putting the basket to work. If in doubt, contact your local dealer or Niftylift Ltd
(see front cover for address).
THE MANUFACTURER HAS NO DIRECT CONTROL OVER THE MACHINE
APPLICATION AND USE. THEREFORE CONFORMATION WITH GOOD SAFETY
PRACTICES IS THE RESPONSIBILITY OF THE USER AND HIS OPERATING
PERSONNEL. FAILURE TO UNDERSTAND AND FOLLOW ALL SAFETY RULES
COULD RESULT IN SERIOUS INJURY OR DEATH.
2.1.1 Only persons trained on the same or a similar model will be permitted to operate the aerial Niftylift.
2.1.2 Always operate the Niftylift in full accordance with the manufacturers Operating & Safety Instructions
for that model.
2.1.3 Before use each day and at the beginning of each shift the Niftylift shall be given a visual inspection
and functional test including, but not limited to, operating and emergency controls, safety devices,
personal protective clothing, including fall protection, air, hydraulic and fuel system leaks, cables and
wiring harness, loose or missing parts, tyres and wheels, placards, warnings, control markings and
Operating and Safety Manuals, guards and guard rail systems and all other items specified by the
manufacturer.
2.1.4 Any problems or malfunctions that affect operational safety must be repaired prior to use of the Niftylift,
with specific regard to any safety components refer to the Parts Manual for part numbers and details. If
in doubt, contact Niftylift Ltd (Details on page 3). Ensure wheels are chocked before carrying out
any maintenance that involves brake release as described in Section 4.8.2 – Towing.
2.1.5 Always ensure that all warning labels, instructions, placards, control markings and Safety Manuals are
intact and clearly legible. If replacements are required contact your local dealer or Niftylift. Always
observe and obey safety and operating instructions on such labels.
2.1.6 Do not alter, modify or disable in any way the controls, safety devices, interlocks or any other part of
the machine.
2.1.7 Before the Niftylift is used and during use the user shall check the area in which it is to be used for
possible hazards such as, but not limited to, uneven ground drop-offs, holes, bumps, obstructions,
debris, floor and overhead obstructions, high voltage conductors, wind and weather, unauthorised
persons and any other possibly hazardous conditions.
2.1.8 Never exceed the maximum basket capacity, as indicated on the decals and machine serial plate.

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Operating & Safety Instructions
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2.1.9 Only operate the Niftylift on a firm, level surface.
2.1.10 Never position any part of the Niftylift within 12ft of any electrical power line, conductor or similar not
exceeding 66kV. (Minimum span 125m) Other distances for increased voltages and different spans
are given in NZECP 34:1993
THIS MACHINE IS NOT INSULATED.
If in doubt, contact the appropriate authorities
2.1.11 On entering the basket, ensure that the drop down entry bar is closed afterwards.
2.1.12 Use of an approved safety belt and lanyard, hard hat and appropriate safety clothing is mandatory.
Fasten harness to designated harness securing points within the basket and do not remove until leaving
the basket whilst in the stowed position.
2.1.13 Always remain standing within the basket. Do not attempt to increase your height
or reach by standing and/or climbing on the basket guard rails or any other object.
KEEP YOUR FEET ON THE BASKET FLOOR. Do not sit, stand or climb on the
guard rail, mid rail or boom linkage. Use of planks, ladders or any other devices on
the Niftylift for achieving additional height or reach shall be prohibited.
2.1.14 Do not use the basket levelling system to artificially increase the outreach of the Niftylift. Never use
boards or ladders in the basket to achieve the same result.
2.1.15 Do not use the basket to lift overhanging or bulky items which may exceed the maximum capacity or
carry objects which may increase the wind loading on the basket.
2.1.16 The Niftylift shall not be operated from a position on trucks, trailers, railway cars, floating vessels,
scaffolds or similar equipment unless the application is approved in writing by Niftylift Ltd in Great
Britain.
2.1.17 Before lowering or boom rotating, always check below and around the basket to ensure that the area is
clear of personnel and obstructions. Care should be taken when boom rotating out into areas where
there may be passing traffic. Use barriers to control traffic flow or prevent access to the machine.
2.1.18 Stunt driving and horseplay, on or around the Niftylift, shall not be permitted.
2.1.19 When other moving equipment and vehicles are present, special precautions shall be taken to comply
with local ordinances or safety standards established for the work place. Warnings such as, but not
limited to flags, roped off areas, flashing lights and barricades shall be used.
2.1.20 Before and during driving while the booms is elevated the operator shall maintain a clear view of the
path of travel, maintain a safe distance from obstacles, debris, drop offs, holes, depressions, ramps
and other hazards to ensure safe elevated travel. Maintain a safe distance from overhead obstacles.
2.1.21 Under all travel conditions the operator shall limit travel speed according to conditions of ground
surface, congestion, visibility, slope, location of personnel and other factors causing hazards of
collision or injury to personnel.

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Operating & Safety Instructions
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2.1.22 The Niftylift shall not be driven on grades, side slopes or ramps exceeding those for which the machine
is rated by the manufacturer.
2.1.23 It shall be the responsibility of the user to determine the hazard classification of any particular
atmosphere or location. Niftylifts operated in hazardous locations shall be approved and suitable for the
duty. (See ANSI/NFPA 505-1987 where applicable).
2.1.24 The operator shall immediately report to his supervisor any potentially hazardous location(s)
(environment) which become evident during operation.
2.1.25 If an operator encounters any suspected malfunction of the Niftylift or any hazard or potentially unsafe
condition relating to capacity, intended use or safe operation, he shall cease operation of the Niftylift
and request further information as to safe operation from his management, or owner, dealer or
manufacturer before further operation of the Niftylift.
2.1.26 The operator shall immediately report to his superior any problems or malfunctions of the Niftylift,
which becomes evident during operation. Any problems or malfunctions that affect the safety of
operation shall be repaired prior to continued use.
2.1.27 The boom and basket of the Niftylift shall not be used to jack the wheels off the ground.
2.1.28 The Niftylift shall not be used as a crane.
2.1.29 The Niftylift shall not be positioned against another object to steady the basket.
2.1.30 Care should be taken to prevent rope, electric cords and hoses from becoming entangled in the
machine.
2.1.31 Batteries shall be recharged in a well ventilated area free of flame, sparks or other hazards which may
cause explosion. Highly explosive hydrogen gas is produced during the charging process.
2.1.32 When checking electrolyte levels great care should be taken to protect eyes, skin and clothing. Battery
acid is highly corrosive and protective glasses and clothing is recommended.
2.1.33 If the basket or elevating assembly becomes caught, snagged or otherwise prevented from normal
motion by adjacent structure or other obstacles, such that control reversal does not free the machine,
all personnel shall be removed from the basket safely before attempts are made to free the basket
using ground controls.
2.1.34
When the machine is not in use always stow the booms correctly. NEVER LEAVE
THE KEYS IN THE MACHINE,if it is to be left for any period of time. Use wheel
chocks if leaving on an incline.
2.1.35 The engine must be shut down while fuel tanks are being filled. Fuelling must be done in a well
ventilated area free of flame, sparks or any other hazard which may cause fire or explosion. GASOLINE,
LIQUID PROPANE AND DIESEL FUELS ARE FLAMMABLE.

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2.1.36 NEVER START THE NIFTYLIFT IF YOU SMELL GASOLINE, LIQUID PROPANE
OR DIESEL FUEL.THESE FUELS ARE HIGHLY FLAMMABLE
2.1.37 The operator shall implement means provided to protect against use by unauthorised persons.
2.1.38 Never remove anything that may affect the stability of the machine such as, but not limited to, batteries,
covers, engines, tyres or ballast.
2.2 ENVIRONMENTAL LIMITATIONS
All Niftylift Self Drives are limited to operation as previously described. Unless specifically configured
otherwise, the machine will have short time rating for operation in extreme temperatures, i.e. reduced
battery cycle times for low temperatures, e.g. freezers, food storage etc, cooling limitations for high
temperatures, i.e. oil temperature not to exceed -23 to 93°Celsius.
Extended operation in dusty environments is not recommended, frequent cleaning will be necessary. All
dust, dirt, salt encrustation, excess oil or grease should be removed. Deposits of paint or bitumen,
particularly on legends or labels should be removed.
All standard Niftylift machines are rated for a wind speed of 28mph or force 6 on the Beaufort scale.
No attempt should be made to operate a Niftylift in wind strengths above this limit and if the operator
has any doubts over the wind speed he / she should cease operation immediately until it can be
established that the wind speed has fallen to a safe level.
DO NOT USE THE NIFTYLIFT IN ELECTRICAL STORMS
2.3 NOISE AND VIBRATION
The airborne noise emission on the SD34T range of machines does not exceed 79dB(A), measured at
a perpendicular distance of 13’, under equivalent continuous A-weighted sound pressure test
conditions. This was based on a Diesel powered machine, working on high throttle, and under load. All
other models will exhibit significantly lower emissions than this figure, dependant on power option.
In normal operation the Vibration level to which the operator is subjected will not exceed a weighted
root mean square acceleration value of 2.5 m/s2.

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Operating & Safety Instructions
USA 03/12
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2.4 TEST REPORT
All Niftylift machine models are subjected to a comprehensive ‘type test’ which duplicates all
combinations of safe working load (SWL), overload, windage, inertia and pull force to assess the
various safe stability criteria. Self propelled machines are also subjected to kerb and braking tests at
the SWL to satisfy additional ‘worse case’ stability requirements.
Each individual machine is then subjected to static overload tests on flat level ground with 150% of the
SWL, exceeding the requirements of EN280 for power operated MEWPs. Self propelled machines are
also tested at the maximum working angle plus 0.5º with a test load of 125% of the SWL. Finally, on all
machines, a functional test is performed with 110% of SWL.
All safety devices are checked for correct operation, operating speeds are checked against benchmark
figures and the dynamic functions ensure that all acceleration and deceleration forces are within
acceptable limits. All noted defects are rectified and recorded before the machine is permitted to enter
into service.

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3 Preparation and Inspection
3.1 UNPACKING
Since the manufacturer has no direct control over the shipping or carriage of any Niftylift it is the
responsibility of the dealer and/or owner and/or leaser to ensure the Niftylift has not been damaged in
transit and a Pre-operational Report has been carried out by a qualified engineer before the aerial
basket is put into service.
A) Remove all ropes, straps and or chains used to secure the aerial basket during transit.
B) Ensure any ramp, loading dock or fork lift used is capable of supporting or lifting the aerial
basket.
C) If the Niftylift is to be driven off, please ensure that the operator has read and fully understood
this entire manual. Refer to the appropriate section for precise operating instructions.
***Carry out the Inspection/service/pre-hire check list (see pages 37 & 38) before placing
machine in service.
3.2 PREPARATION FOR USE
Whilst every effort has been made at the Niftylift factory to ensure your machine arrives in a safe and
operable condition it is necessary to carry out a systematic inspection prior to putting the machine into
service.
THIS IS NOT A REQUEST IT IS MANDATORY
To assist the user in this task you will find enclosed a Inspection/service/pre-hire check list, which
must be filled out upon delivery/receipt of the machine.
Before the user carries out the Pre-operational Report he must have read and fully understood all the
contents of the Operating, Safety and Maintenance Manual.
WARNING - FAILURE TO COMPLETE THE INITIAL PRE-OPERATIONAL
REPORT AND RETURN THE TOP COPY TO NIFTYLIFT RENDERS THE
WARRANTY INVALID.
WARNING - DO NOT OPERATE A POTENTIALLY DEFECTIVE OR
MALFUNCTIONING MACHINE. CORRECT AND REPAIR ANY DEFECTS
BEFORE OPERATING YOUR NIFTYLIFT.

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Operating & Safety Instructions
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3.3 PRE-OPERATIONAL SAFETY CHECK SCHEDULES
Before use at the beginning of the work shift, the Niftylift shall be given a visual inspection and
functional tests including, but not limited to the following. It is recommended that these be performed
at regular intervals as indicated on each checklist.
3.3.1 DAILY SAFETY CHECKS
1) Check that all labels (decals) are in place and legible.
2) Visually inspect the machine for damaged or loose components.
3) Check that batteries are charged i.e. Charger has a solid green light and a pulsing red light.
4) Check the fuel level (if applicable).
5) Check that canopies/covers and guards are in place and secure.
6) Check that the boom rest switch is operable (if applicable).
7) Check that control levers are secure and operate freely.
8) Check that operating buttons and emergency stop buttons function properly.
9) Check the operation of the manual hand pump.
10) Visually inspect all hydraulic hoses and fittings for damage or leaks.
11) Check operation of the stabiliser alarm.
12) Check that outrigger footpads are secure.
13) Check that the basket pivot pins and their tag bolts are secure.
14) Check security and operation of the boom clamp.
15) Check that the tilt alarm is functioning properly.
3.3.2 WEEKLY SAFETY CHECKS
1) Inspect tyres and wheels for damage and wear.
2) Check tyres for correct pressure. 30psi (2 bar)
3) Check battery fluid levels and specific gravity (after charging) and general condition.
4) Check hydraulic oil level, Grade 32
5) Inspect the engine air filter and clean or replace if necessary.
6) Check operation and security of stabiliser micro switches in conjunction with the alarm system.
7) Inspect hose track for damage or missing parts.

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3.3.3 MONTHLY SAFETY CHECKS
1) Check the engine oil level (if applicable).
2) Check the wheel nuts (torque 65ft lbs / 86Nm).
3) Check outriggers for condition, security and operation.
4) Check that the boom rotate worm is secure and correctly in mesh. Clean and re-grease.
5) Inspect brakes for operation and wear.
6) Grease the knuckle and centre post.
7) Inspect the engine fuel tank for damage or leaks.
8) Check telescopic boom wear pads and nylon studs (if applicable).
9) Lightly oil the jack pad ball joints.
10) Check that the bolts holding the wheel motors to the chassis are secure.
3.3.4 ANNUAL SAFETY CHECKS
1) Check that all pivot pins and their tag bolts are secure.
2) Inspect for any cracks or badly rusted areas on booms and chassis.
3) Change the hydraulic oil filters.
4) Inspect the suspension on each rear axle unit.
5) Check that boom rotate ringbolts are secure (torque 155ft lbs. 210Nm).

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3.4 PLACARD, DECALS & INSTALLATION (UK/USA)
ITEM DESCRIPTION NUMBER QTY
1
Nifty SD120T – Grey
Nifty SD34T - Grey
P21330
P21331
2
2
2
4x4 - Grey
P14697 2
3
Rotating machinery (SD34T Only)
P15010 2
4 SWL 200kg SD120T
SWL 500lbs SD34T
P14801
P17328
1
1
5 Outriggers - Hydraulic P14841 3
6
General Warning
P21970
2
7
Daily Safety Check List
P14908
1
8
If E-Stop disabled…
P14864
2
9
Clink Click
P19961
2
10
If Tilt Alarm Sounds
P18842
2
11
Overload Warning
P18848
2
12
General Crush
P14872 8
13
No Step
P14785 6
14
Niftylift.com
P14390 2
15
Travel direction
P14784
1
16
Harness Point
P14883
2
17
Basket Gate Warning
P18432 1
18
Operating Instructions
P14892 1
19
Point Load - 13 kN
P14965 4
20
Footswitch
P14884 1
21 Head Protection P14921 1
22 Remote Charge Point P16367 1
23
General Notice
P21941
1
24
Booms/Brake Selector
P21864
1
25
Component Stability
P19708
1
26
Manual Hand Pump
P19090
1
27
Trip Switch Reset
P19056
1
28
Hydraulic Controls – 4 lever
P14937 1
29
Hydraulic Controls – 5 lever
P14927 1
30
Base Control
P15881
1
31
Basket Control
P18961
1
33
Warning Stripes
A/R
40
Diesel ONLY
P14414
1
41
Noise Warning
P17124
1
42
Battery Isolator
P18610
1
43
Battery Charger
P21951
1
44
Charger socket
P19699
1
45
Battery management
P11777
1
47
Engine emissions (SD34T Only)
P15334 1
50 Power to Basket 220V
110V
P17719
P17720
1
1

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3.5 TORQUE REQUIREMENTS
SCREW QUALITY/SIZE Tightening torque in ft lbs (Nm)
Grade 8.8 10.9
M 6 7.4 (10) 10 (14)
M 8 18.5 (25) 26 (35)
M 10 36 (49) 51 (69)
M 12 65 (86) 89 (120)
M 14 100 (135) 140 (190)
M 16 155 (210) 218 (295)
M 18 215 (290) 300 (405)
WHEEL NUTS 65ft lbs 86Nm
WHEEL MOTOR NUTS 340ft lbs 460Nm
BOOM ROTATE RING BOLTS 155ft lbs 210Nm

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4 Operation
4.1 CONTROL CIRCUIT COMPONENTS
4.1.1 CONTROL BOARD: - Situated behind the door, the encapsulated control board comprises of a PCB
(printed circuit board) design which incorporates all of the relays to control the machine operation. The
control board is common to all models and contains functions which might not be utilised on your
machine. Thermal trip switches are integral to the box, which protect the control circuit components. If
power is lost, the switches can be manually reset.
4.1.2 TILT ALARM: - Fitted to the base of the machine, the tilt alarm is a solid state sensor which monitors
the inclination of the machine. When the booms are raised, the angle of inclination is monitored, giving
an alarm if the maximum angle is exceeded on set-up. The tilt alarm does not operate when the
machine is being driven, as the boom switch overrides this function as long as the booms are lowered.
4.1.3 SOUNDER: - Situated adjacent to the PCB is a small electric sounder, which is used to provide an
intermittent alarm whenever the machine is in operation. Pushing a green “power control” button or
depressing the foot switch in the basket (if fitted) will energise this sounder. This serves to warn
personnel of the operation of the machine.
4.1.4 KLAXON: -Also mounted next to the engine key switch is a klaxon, which performs several functions.-
Firstly, it can be used as a manual alert, by pushing the “Horn” button at the Basket Control Station.
Secondly, it is the device which sounds continuously if the tilt alarm sensor detects excessive
inclination, with the booms raised.
Lastly, it is linked into the battery management system, such that when low battery state is reached the
“pulsing” of the DC motors is mimicked by the Klaxon, re-enforcing the message to the operator to re-
charge the batteries.
4.1.5 DRIVE CONTROL VALVE (DCV):-The motion control valve comprises of several individual
components all directly involved in the hydraulic supply to the wheel drive motors. The pressure relief
valves and non-return valves serve to control the machine speed in normal drive and to prevent over-
speed when descending slopes.
4.1.6 BRAKE RELEASE VALVE (BRV):- The motion control valve also incorporates a solenoid operated
dump valve which controls the brake function on the machine. This valve must be energised to allow
the machine to move. If no voltage is present, the wheel motors will not be able to develop drive
torque, whilst at the same time, the hydrostatically applied parking brakes will remain engaged. Only
when the green “power control” button is being used (or the basket foot switch is depressed) will the
BRV operate. Pressing the drive joystick trigger will then energise the BRV and permit the drive
function.
4.1.7 BOOM SWITCH: -Mounted between the main booms, near the knuckle and operated by a cam, this
switch controls both the operation of the tilt alarm sensor, and the outrigger interlock. With the booms
in the stowed position, the tilt alarm sensor is bypassed, allowing the machine to negotiate slopes in
excess of the permissible working angle, without isolating the drive function. At the same time, fast
throttle is enabled. When the booms are raised, the tilt alarm sensor becomes activated, and the boom
switch isolates the jack control circuit. These control functions are of primary importance to the safety
of the machine and operator; under no circumstances should this control function be isolated or
bypassed.