Advance acoustic Terra 3700B User manual

Terra™ 3700B
SERVICE MANUAL
Advance Model: 908 4203 010
146 1995 000(1)2005-08

SERVICE MANUAL
146 1995 000(1)2005-08 1
GENERAL INFORMATION ................................................................................................................................... 2
MACHINE LIFTING ...............................................................................................................................................................2
MACHINE TRANSPORT ......................................................................................................................................................2
PUSHING OR TOWING THE MACHINE ..............................................................................................................................2
SAFETY ................................................................................................................................................................. 3
GENERAL SAFETY PRECAUTIONS ...................................................................................................................................3
TECHNICAL DATA ............................................................................................................................................... 5
MAINTENANCE ..................................................................................................................................................... 7
SCHEDULED MAINTENANCE .............................................................................................................................................7
SCHEDULED MAINTENANCE TABLE ................................................................................................................................7
MACHINE NOMENCLATURE ............................................................................................................................... 8
MACHINE NOMENCLATURE ..............................................................................................................................................9
SWEEPING SYSTEM .......................................................................................................................................... 11
MOTOR-TO-MAIN BROOM BELT CHECK ........................................................................................................................11
MOTOR-TO-MAIN BROOM BELT REPLACEMENT ..........................................................................................................11
MAIN BROOM HEIGHT CHECK AND ADJUSTMENT .......................................................................................................12
MAIN BROOM REPLACEMENT .........................................................................................................................................13
SIDE BROOM HEIGHT CHECK AND ADJUSTMENT .......................................................................................................14
SIDE BROOM REPLACEMENT .........................................................................................................................................16
MAIN MOTOR ELECTRICAL INPUT CHECK ....................................................................................................................17
MAIN MOTOR CARBON BRUSH CHECK AND REPLACEMENT .....................................................................................18
MAIN MOTOR AND REDUCTION UNIT REMOVAL/INSTALLATION ...............................................................................19
SIDE BROOM MOTOR ELECTRICAL INPUT CHECK ......................................................................................................22
SIDE BROOM MOTOR REMOVAL/INSTALLATION ..........................................................................................................23
TROUBLESHOOTING ........................................................................................................................................................24
SKIRT .................................................................................................................................................................. 25
SKIRT HEIGHT CHECK AND ADJUSTMENT AND OPERATION CHECK .......................................................................25
SIDE SKIRT REPLACEMENT ............................................................................................................................................27
FRONT AND REAR SKIRT REPLACEMENT .....................................................................................................................28
FRONT SKIRT LIFTING CABLE ADJUSTMENT ...............................................................................................................29
FRONT AND REAR SKIRT REPLACEMENT .....................................................................................................................30
FRONT SKIRT LIFTING CABLE REPLACEMENT .............................................................................................................31
DUST AND DEBRIS COLLECTION SYSTEM .................................................................................................... 32
DUST FILTER CLEANING AND INTEGRITY CHECK .......................................................................................................32
FILTER SHAKER OPERATION CHECK ............................................................................................................................33
FILTER SHAKER MOTOR ELECTRICAL INPUT CHECK .................................................................................................33
TROUBLESHOOTING ........................................................................................................................................................34
MANUAL VACUUM SYSTEM ............................................................................................................................. 35
MANUAL VACUUM SYSTEM MOTOR CARBON BRUSH CHECK AND REPLACEMENT ..............................................35
MANUAL VACUUM SYSTEM MOTOR REMOVAL/INSTALLATION .................................................................................36
TROUBLESHOOTING ........................................................................................................................................................37
BRAKE SYSTEM ................................................................................................................................................. 38
BRAKE ADJUSTMENT .......................................................................................................................................................38
BRAKE REPLACEMENT ....................................................................................................................................................39
DRIVE SYSTEM .................................................................................................................................................. 41
DRIVE MOTOR ELECTRICAL INPUT CHECK ..................................................................................................................41
DRIVE MOTOR CARBON BRUSH CHECK AND REPLACEMENT ...................................................................................42
DRIVE MOTOR REMOVAL/INSTALLATION ......................................................................................................................43
FORWARD/REVERSE GEAR PEDAL CHECK AND ADJUSTMENT ................................................................................44
TROUBLESHOOTING ........................................................................................................................................................46
OTHER SYSTEMS .............................................................................................................................................. 47
SCREW AND NUT TIGHTENING CHECK .........................................................................................................................47
ELECTRICAL SYSTEM ....................................................................................................................................... 48
BATTERY MAINTENANCE AND RECHARGING ..............................................................................................................48
(WET OR GEL) BATTERY INSTALLATION AND SETTING ..............................................................................................48
DRIVE ELECTRONIC BOARD REPLACEMENT ...............................................................................................................49
HOUR COUNTER AND BATTERY CHARGE STATUS DISPLAY ELECTRONIC BOARD REPLACEMENT ...................50
MACHINE SHOULD NOT START WHEN THERE IS NO OPERATOR ON THE DRIVER'S SEAT ..................................51
HOOD SAFETY SWITCH OPERATION CHECK ...............................................................................................................51
MACHINE SHOULD NOT START IF THE BATTERY CHARGER PLUG IS CONNECTED TO THE OUTLET .................51
COMPONENT LAYOUT .....................................................................................................................................................52
WIRING DIAGRAM .............................................................................................................................................................55

SERVICE MANUAL
2146 1995 000(1)2005-08
GENERAL INFORMATION
MACHINE LIFTING
MACHINE TRANSPORT
PUSHING OR TOWING THE MACHINE
WARNING!
Do not work under the lifted machine without supporting it with safety stands.
WARNING!
Before transporting the machine, make sure that:
• All doors and guards are closed.
• The key is not inserted in the ignition switch.
• The machine is securely fastened to the means of transport.
WARNING!
When pushing or towing the machine, carefully follow the relevant instructions given in the
Instructions for use manual. If you do not follow the given instructions the machine can be damaged.

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146 1995 000(1)2005-08 3
SAFETY
The following symbols indicate potentially dangerous situations.
Always read this information carefully and take all necessary precautions to safeguard people and property.
GENERAL SAFETY PRECAUTIONS
Specific warnings and cautions used to indicate potential damage to people and machines are shown below.
DANGER!
It indicates a dangerous situation with risk of death for the Operator.
WARNING!
It indicates a potential risk of injury for people.
CAUTION!
It indicates a caution or a remark related to important or useful functions.
Pay attention to the paragraphs marked by this symbol.
NOTE
Consult the Instructions for use manual before performing any operation.
DANGER!
– Remove the ignition key and disconnect the batteries before performing any maintenance/repair
operation.
– This machine must be used by properly trained and authorised personnel only. Children or
disabled people cannot use this machine.
– Keep sparks, flames and smoking materials away from the batteries. Duringthe normal operation
explosive gases are released.
– Do not wear jewels when working near electrical components.
– Do not work under the lifted machine, if it is not securely fixed.
– Do not operate the machine near toxic, dangerous, inflammable and/or explosive powders,
liquids or vapours.
– Battery charging produces highly explosive hydrogen gas. Keep the hood open during battery
charging and perform this operation in well-ventilated areas and away from naked flames.

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4146 1995 000(1)2005-08
WARNING!
– Carefully read all maintenance/repair instructions before performing any maintenance/repair
procedure.
– Take all necessary precautions to prevent hair, jewellery and loose clothes from being caught by
the machine moving parts.
– Do not smoke while charging the batteries.
– Do not leave the machine unattended while the ignition key is inserted without being sure that the
machine cannot move independently.
– Do not use the machine on slopes with a gradient exceeding the value shown on the machine.
– Do not wash the machine with direct water jets or corrosive substances. Donot clean the machine
using compressed air.
– Do not use the machine in particularly dusty areas.
– While using this machine take care not to injure other people.
– The storage temperature must be between 32°F and 104°F (0°C and +40°C).
– The machine operating temperature must be between 32°F and 104°F (0°C and +40°C).
– The humidity must be between 30% and 95%.
– Always protect the machine against the sun, rain and bad weather, both under operation or
inactivity condition.
– Do not use the machine as a means of transport.
– Do not allow the brooms to operate while the machine is stationary to avoid damaging the floor.
– In case of fire, possibly use a powder fire extinguisher, not a water one.
– Do not remove or modify the plates affixed to the machine.
– In case of part replacement, order ORIGINAL spare parts from an authorised Dealer or Retailer.
– After its lifespan, the machine must be disposed of properly, due to toxic-harmful materials
(batteries, oils, etc.), which are subject to standards that require disposal in special centres (see
the Instructions for use manual).
– Be very careful when operating the machine at high speeds: sudden steering could cause this
three-wheel machine to become unstable due to weight distribution.
Always reduce the speed before steering.
– When lead (WET) batteries are installed on the machine, do not tilt the machine of more than 30°
from the horizontal plane to prevent the highly corrosive acid from leaking out of the batteries.
When the machine is to be tilted for maintenance operations, remove the batteries.

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146 1995 000(1)2005-08 5
TECHNICAL DATA
(*) Under normal working conditions, on a level asphalt surface.
Dimensions Values
Minimum machine length 49.4 in (1,255 mm)
Machine width (without side brooms) 31.3 in (795 mm)
Machine maximum height 45.47 in (1,155 mm)
Working width (with/without side brooms) 39.4/23.6 in (1000/600 mm)
Minimum ground clearance (skirts not included) 1.6 in (40 mm)
Main broom size 10.43 x 23.62 in (265 mm x 600 mm)
Side broom size 13.66 in (347 mm)
Front drive and steering wheel size 7.87 x 1.97 in (200 x 50 mm)
Rear wheels 9.84 x 1.97 in (250 x 50 mm)
Machine total weight 327.07 lb (148.49 Kg)
Forward speed 3.4 mph (5.5 km/h)
Reverse speed 2.7 mph (4.4 km/h)
Gradeability 16%
Waste container capacity 13.2 gal (50 L)
Main broom and fan motor 600 W
Side broom motors 60 W
Drive motor 400 W
Filter shaker motor 12 W
Sound level (Lpa)71.6 dB(A)
Vibration level at the operator’s arms (*) < 2.5 m/s2
Vibration level at the operator’s body (*) < 0.6 m/s2
Batteries Values
Voltage 24 V
Standard Lead (WET), with acid electrolyte
Optional Gel (GEL), hermetic
Capacity 100 - 240 Ah C5
Battery compartment max. size 357x375x385 mm (14.1x14.8x15.2 in)
Dust vacuuming and filtering Values
Paper dust filter, 5-10 µm 3 m2 (32.3 ft2)
Main broom compartment vacuum 0.72 inH2O (18.3 mmH2O)
NOTE
For other petrol engine data/values, see the relevant Instructions for use manual.

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6146 1995 000(1)2005-08
S300796

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146 1995 000(1)2005-08 7
MAINTENANCE
SCHEDULED MAINTENANCE
The lifespan of the machine and its maximum operating safety are ensured by correct and regular maintenance.
Provided below is the Scheduled Maintenance Table. The intervals shown may vary according to particular working
conditions, which are to be defined by the person in charge of the maintenance.
For instructions relating to maintenance operations, see the following paragraphs.
SCHEDULED MAINTENANCE TABLE
(1): and after the first 8 running-in hours
WARNING!
See the GENERAL INFORMATION and SAFETY chapters.
Maintenance operation On delivery Every 10
hours Every 50 hours Every 100 hours Every 200 hours Every 400 hours
Battery fluid level check
Side and main broom height check and
adjustment
Dust filter cleaning and integrity check
Skirt height and operation check
Filter shaker operation check
Hood safety switch operation check
Main broom drive belt check
Nut and screw tightening check (1)
Service and parking brake check and
adjustment
Main broom drive belt replacement
Main and drive motor carbon brush check
and replacement

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8146 1995 000(1)2005-08
MACHINE NOMENCLATURE
Throughout this Manual you will find numbers in brackets – for example: (2). These numbers refer to the components
indicated in these two nomenclature pages. Refer to these pages whenever it will be necessary to identify a component
mentioned in the text.
1. Left control panel
2. Ignition key
3. Discharged battery warning light
4. Semi-discharged battery warning light
5. Charged battery warning light
6. Display
7. Display selection button: hour counter/ hour and minutes
counter / battery voltage (V)
9. Horn push-button
10. Switch having the following functions:
– in the central position: it is off
– pushed forward (fixed): it activates the main broom
rotation and the vacuum fan
– pushed backward (not fixed): it activates the filter shaker
12. Manual vacuum system switch (optional)
13. Working light switch (optional)
14. Emergency push-button
15. Control panel mounting screws
16. Right control panel
17. Steering wheel
18. Steering column inclination adjusting lever
19. Vacuum activation/deactivation lever
20. Side broom lifting/lowering lever
21. Forward/reverse gear pedal
22. Service brake pedal
23. Parking brake lever (it acts on the front wheel)
23a. Lever in the position of brake engaged (rotated backward)
23b. Lever in the position of brake disengaged (rotated forward)
24. Front skirt lifting pedal
25. Can holder
26. Hood
27. Rear wheels on fixed axle
28. Front drive and steering wheel
29. Right side broom
30. Left side broom
31. Main broom
32. Left side skirt
33. Right side skirt
34. Front skirt
35. Rear skirt
36. Waste container
37. Waste container hook
38. Waste container handle
39. Removable door for main broom extraction
40. Main broom height left adjuster
41. Main broom height right adjuster
42. Main broom right door
43. Main broom right door mounting screws
44. Pivoting light (always on when the ignition key is turned to “I”
position) (optional)
45. Driver's seat with safety microswitch
46. Additional hole for manual vacuum system kit (optional)
47. Adjustable steering column
48. Working light (optional)
49. Side broom height adjusting block
50. Seat longitudinal position adjusting lever
51. Manual vacuum system kit (optional)
56. Serial number plate/technical data/EC certification
59. Hood (open position)
60. Hood support rod
61. Batteries
62. Battery caps (for lead batteries)
63. Battery connector
64. Electronic battery charger
65. Battery charger electrical cable
66. Lamellar fuse box (services)
67. Drive circuit breaker
68. Main broom/fan motor circuit breaker
69. Lead (WET) or gel (GEL) battery selector switch located on
the optional electronic battery charger
70. Charged battery warning light
71. Main broom belt
72. Drive pulley to main broom
73. Vacuum fan
74. Main motor
76. Manual vacuum system (optional)
77. Switch for machine pushing
78. Battery connection diagrams
92. Main broom belt tensioner
93. Hood safety switch

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146 1995 000(1)2005-08 9
MACHINE NOMENCLATURE
S300797

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10 146 1995 000(1)2005-08
S300798

SERVICE MANUAL
146 1995 000(1)2005-08 11
SWEEPING SYSTEM
MOTOR-TO-MAIN BROOM BELT CHECK
1. Drive the machine on a level ground and engage the parking brake (23).
2. Turn the ignition key (2) to “0” position, then remove it.
3. Raise the hood (26) and engage the hood support rod (60).
4. Check the motor-to-main broom belt (71) condition. To check the pulley, make it rotate operating on the fan (73).
5. If the belt is worn out, replace it.
6. Check that the belt tensioner (92) is in good condition.
7. Disengage the support rod (60) and lower the hood (26).
MOTOR-TO-MAIN BROOM BELT REPLACEMENT
1. Drive the machine on a level ground and engage the parking brake (23).
2. Turn the ignition key (2) to “0” position.
3. Remove the main broom.
4. Remove the belt (71) from the pulley (72). To make the operation easier, rotate the pulley (72) operating on the fan
(73).
5. Remove the screws (43) and the right door (42) together with the belt (71) to be replaced.
6. Install the parts in the reverse order of removal.
Position the belt (71) tensioner (92) as shown in the figure below.
Figure 1
S300801

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12 146 1995 000(1)2005-08
MAIN BROOM HEIGHT CHECK AND ADJUSTMENT
Check
1. Check the main broom for proper ground clearance, proceeding as follows:
– Drive the machine on a level ground;
– Keep the machine stationary and rotate the main broom for a few seconds;
– Stop the main broom, then move the machine and switch it off;
– Check that the main broom print (A), along its length, is from 2 to 4 cm wide.
If the print (A) is not within specifications, it is necessary to adjust the broom height by proceeding as described
later.
Adjustment
2. Drive the machine on a level ground and engage the parking brake (23).
3. Turn the ignition key (2) to “0” position.
4. Loosen the knobs (B) on both sides of the machine.
5. Move the broom height variation indicator (C) as necessary on both sides of the machine by using the knobs (B),
then screw down the knobs (B).
The indicator (C) must be at the same position on both sides of the machine; the maximum difference allowed to
obtain the print (A) described in step 1 (2 - 4 cm wide) is 2 notches.
6. Perform step 1 again to check proper adjustment of main broom ground clearance.
7. When the main broom is too worn out to be adjusted, replace it as shown on the next page.
Figure 2
NOTE
Brooms of various hardness are available. This procedure is applicable to all types of brooms.
CAUTION!
An excessive print (larger than 4 cm) of the main brush can lead to machine malfunction and
overheating of its moving and electrical parts, thus reducing machine life.
Be extremely careful when performing the above-mentioned checks and always use the machine
according to the indicated conditions.
S300802 S300803

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146 1995 000(1)2005-08 13
MAIN BROOM REPLACEMENT
1. Drive the machine on a level ground and engage the parking brake (23).
2. Turn the ignition key (2) to “0” position, then remove it.
3. Loosen the knobs (A) on both sides of the machine.
4. Move the broom height variation indicators (B) until the broom is at the maximum height from the ground. Screw
down the knobs (A).
5. Loosen the knob (C) on the left side of the machine.
6. Remove the broom door (D) by pushing it downwards to disengage the fasteners (E).
7. Pull out the broom (F).
8. Install the new broom with the bristles rows (G) bent as shown in the figure (top view).
9. Install the new broom on the machine and ensure that its opening (H) fits into the related drive hub (I).
Check that the drive hub (I) is free from dirt or foreign materials (cords, rags, etc.) accidentally rolled up.
10. Install the broom door (D) by engaging the fasteners (E).
11. Screw down the knob (C).
12. Carry out the main broom height adjustment as described in the previous paragraph.
Figure 3
NOTE
Brooms of various hardness are available. This procedure is applicable to all types of brooms.
CAUTION!
It is advisable to use protective gloves when replacing the main broom because there can be
cutting debris between the bristles.
S300804 S300805
S300806 S300807 S300808

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14 146 1995 000(1)2005-08
SIDE BROOM HEIGHT CHECK AND ADJUSTMENT
Check
1. Check the side brooms for proper ground clearance, proceeding as follows:
– Drive the machine on a level ground and lower the side brooms;
– Keep the machine stationary and rotate the side brooms for a few seconds.
– Lift the side brooms, then move the machine;
– Check that the size and the orientation of the prints left by the side brooms (A) match with (A) and (B) areas.
If the prints are not within specifications, it is necessary to adjust the broom height by proceeding as described
in step 2 below.
Height adjustment of both side brooms
2. Disengage the lever (20) and rotate the block (49) clockwise or counterclockwise to adjust the broom height from
the ground.
Perform step 1 again to check proper adjustment of side broom ground clearance.
When the brooms are too worn out to be adjusted, replace them as shown in the next paragraph.
If it is necessary to adjust side brooms individually, proceed as follows.
Height adjustment of either side broom
3. Drive the machine on a level ground and engage the parking brake (23).
4. Turn the ignition key (2) to “0” position, then remove it.
5. Remove the waste container (36) by following the instructions given in the Instructions for use manual.
6. Remove the batteries (61) and the battery holder.
7. Carefully raise the machine front side (C) with the help of another person, then lean its back side on the ground (as
shown in the figure), supporting it on a safety stand (D).
8. Loosen the locknut (F) and screw down/out the screw (G) by using the control cable (E) of the broom which needs
adjusting; then tighten the locknut (F).
When the brooms are too worn out to be adjusted, replace them as shown in the next paragraph.
9. Perform steps 3 - 8 in reverse order.
NOTE
Brooms of various hardness are available. This procedure is applicable to all types of brooms.
WARNING!
If you do not remove the batteries before tilting the machine, you could cause serious damage to
people or the machine.

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146 1995 000(1)2005-08 15
Figure 4
S300809

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16 146 1995 000(1)2005-08
SIDE BROOM REPLACEMENT
1. Drive the machine on a level ground and engage the parking brake (23).
2. Turn the ignition key (2) to “0” position, then remove it.
3. Put your hand into the side broom and press the tabs (A) inwards, then remove the broom (B) disengaging it from
the four pins (C).
4. Install the new broom on the machine engaging it on the pins (C) and on the tabs (A).
5. Carry out the side broom height adjustment as described in the previous paragraph.
Figure 5
S300810
NOTE
Brooms of various hardness are available. This procedure is applicable to all types of brooms.
CAUTION!
It is advisable to use protective gloves when replacing the side brooms because there can be cutting
debris between the bristles.

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146 1995 000(1)2005-08 17
MAIN MOTOR ELECTRICAL INPUT CHECK
Preliminary operations
1. Carry out the main broom height check and adjustment.
2. Drive the machine on a level ground and engage the parking brake (23).
3. Turn the ignition key (2) to “0” position, then remove it.
4. Raise the hood (26) and engage the hood support rod (36).
5. Connect the main motor (74) to the battery (61) as shown in the underlying diagram (A), by inserting the 30 A fuse
(B), for safety's sake.
Connect an ammeter (C) to the connection (A) and arrange it so as to close the hood (26) and perform the test
described at the next step. In this way, the ammeter (C) can be seen while operating the machine.
Main motor electrical input check
6. Start the machine and perform a sweeping simulation, following the instructions given in the Instructions for use
manual. The following conditions are required:
– main broom: correctly adjusted
– side brooms: raised
– machine speed: highest
– suction filter: cleaned using the filter shaker
– drive the machine on a stretch of level ground (in both directions while recording both values)
With above conditions met, record the main motor electrical input using the ammeter (C).
Stopthemachine andcomparethereadingswith the valueslisted in thetablebelow, according tothekind of ground
the test has been performed on.
If the electrical input is higher, perform the following operations to detect and eliminate the cause of the abnormal
input:
– Remove from the main broom drive system any dirt or foreign materials obstructing or slowing down the
machine movement.
– If necessary, check the motor carbon brushes.
– Furthermore, remove, clean and check the main motor, if necessary.
If the above-mentioned procedures do not lead to a correct electrical input, it is necessary to replace the motor.
Reset
7. Carry out steps 4 and 5 in reverse order.
Figure 6
S300811
WARNING!
This procedure must be performed by qualified personnel only.
Kind of surface A
Smooth concrete base 20 — 22
Light carpet 20 — 22
Heavy carpet 20 — 26
A

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18 146 1995 000(1)2005-08
MAIN MOTOR CARBON BRUSH CHECK AND REPLACEMENT
1. Drive the machine on a level ground and engage the parking brake (23).
2. Turn the ignition key (2) to “0” position, then remove it.
3. Raise the hood (26) and engage the hood support rod (36).
4. Disconnect the battery electrical connector (63).
5. Remove dust and dirt from the outside of the motor; then disengage and remove the clamp (A).
6. Lift the retaining spring (B) of each carbon brush, then remove the four carbon brushes (C).
7. Check the four carbon brushes for wear. The carbon brushes are worn when there is not sufficient contact with the
motor armature, because of their use, of the contact surface which is not integral or because the thrust spring is
broken, etc.
8. If necessary, remove the carbon brushes to replace them, by removing the nuts (D) and disengaging the lead-in
wires (E).
Replace the carbon brushes as an assembly.
9. Installthe partsin thereverse orderof removal, taking care tothe connectionsof terminals(E) and to their insulation
from the surrounding parts of the frame.
Figure 7
S300812