Wynn Marine 8000 Series User manual

Wynn Marine Ltd
2-4 Merse Road, North Moons Moat, Redditch, Worcestershire B98 9HL, United Kingdom
Tel: [phone], Fax: [phone]
Email: [e-mail], website www.b-hepworth.com
These manuals have been page checked for completeness, the soft copy and hard copy are
identical in every respect and these manuals are Fit For Purpose and appropriate to the equipment
fitted on the Khareef Class Ships.
WARNING: A suitably qualified person should perform all installation and maintenance. All electrical wiring should be carried out in
accordance with relevant regulations. Ensure all products are correctly earthed and all connections are made in accordance with the
wiring diagram. Non-compliance may result in damage, malfunction or personal injury. Before commencing any installation or
maintenance work, ensure that the electrical supply is disconnected.
Installation and Operation Manual
Type D MKV Straight Line Wiper
Series 8000 Network Control System
Issue 7

Index
Safety Summary 1
Wiper Description 2
Wiper Installation 4
Wiper Installation Drawing 9
Wiper Installation Drawing Twin 11
Wiper Fault Finding 13
Wiper Maintenance 16
Wiper Inspection and Renewal 18
Wiper Spares List 21
Wiper Spares Drawing 24
Wiper Spares Drawing Twin 25
Wiper Arm 27
Double Wiper Arm 28
Double Wiper Arm 29
SLW Part Number Calculator 31
Motor Pod Part Number Calculator 33
Controller Description 34
Typical Bridge Layout 39
Controller Bus Connections 40
Controller Bus Connections 41
Bus Cable Installation 42
Controller Keypad Installation 45
Controller Keypad Operation 50
Controller Keypad User Programming 52
Module Installation 57

Module Electrical Drawing 65
19 Inch Rack Installation 66
Module Electrical Drawing 75
Module Electrical Drawing 76
Connector Information 77
Controller Troubleshooting 78
Documentation 86

1
GENERAL INFORMATION AND SAFETY SUMMARY
As we will have no influence on the installation of complete windscreen wiper systems if installation
is to be carried out by the customer, we are unable to accept liability for installation errors.
If you require any additional information or any special problems arise which the
installation/maintenanceinstructions do not treat in sufficient detail please contact Customer Service
at B. Hepworth and Co Ltd directly.
Safety Precautions
CAUTION! BEWARE OF INJURY!
BEFORE WORKING ON THE WIPER SYSTEM, OBSERVE THE FOLLOWING REMARKS
WITHOUT FAIL!
Most wiper motors have a park setting, which permits them to default to the parked position if
connected to the vehicle electrical system, even when the wiper is switched off. FOR THIS
REASON, AT THIS POINT IN TIME, NEITHER MAY THE WIPER ARM BE MOUNTED, NOR MAY
ANY PERSON HAVE HANDS, FINGERS, ETC ANYWHERE NEAR THE WIPER SYSTEM. Even
small wiper motors can neither be braked nor stopped by hand.
NEVER REACH INTO THE AREA OF THE DRIVE BELT WHEN THE SYSTEM IS RUNNING!
When putting into service (i.e. when connecting the wiper motor to the vehicle electrical system,
even if the wiper switch is in the off position), never leave any loose items such as screwdrivers in
the area of the wiper system, as flying objects could lead to injury.
Please ensure the equipment is handled with care. Do not drop or bang the equipment down on a
hard surface taking extra care around the area where the motor shaft is situated. Do not hammer
the motor shaft when installing the equipment, as this will cause the motor gear plate to deform
causing premature failure of the unit.
Wipers should be wrapped in protective material after installation to protect themfrom damage. Type
of material depends on work done in the vicinity, for instance, if welding or grinding work needs to
be done near the wipers then a fire resistant blanket should be used. If no welding or grinding work
is required near the wipers then bubble is sufficient.
Introduction
The Windscreen Wiper system utilised is detailed on the following pages. The primary components
that form the WindscreenWiper System are the wiper case assembly, the wiper arm assemblies and
the wiper blades.

2
TYPE D5 DESCRIPTION AND SPECIFICATION
The ‘Type D MK V’ is a Heavy Duty Straight Line Wiper with an electric motor mounted externally in
a housing protected to IP67. The standard motor housing position is normally supplied on the left
side of the unit (mounted above the window and viewed looking into the window).
All electric motors incorporate a worm reduction gearbox. Windings are to Class F insulation.
The DC motor option is suitable for single speed operation. Complies with the EMC Directive
according to the following: EN 60945:2002
The AC 1-phase motor option is single speed operation. Complies with the EMC Directive according
to the following: EN 60945:2002
The standard AC 3-phase motor option is for either 1 or 2 speed operation. Complies with the EMC
Directive according to the following: EN 60945:2002
The variable frequency AC 3-phase motor option is for 3 speed operation and must be used with the
8000 Series Controller. Complies with the EMC Directive according to the following: EN 60945:2002
Motor Specifications
Motor
Type
Nominal
Voltage
Full load current
at 50/60 Hz
Fusing
Value 50/60 Hz
Speed
Compass
Safe
Distance
Protection
Rating
PM3M
Permanent Magnet
24V DC
4.5 A
6.0 A
1.4 m/s
2.4 m
IP54
PM3M (L)
Permanent Magnet
24V DC
4.5 A
6.0 A
0.7 m/s
2.4 m
IP54
PARV65
1 Phase Induction
115 V
2.3/2.6 A
2.5/3.15 A
1.4 m/s
0.5 m
IP20
PARV65L
1 Phase Induction
115 V
1.5/1.6 A
2.5/3.15 A
0.7 m/s
0.5 m
IP20
PARV64-T
1 Phase Induction
230 V
1.2/1.6 A
1.6/2.0 A
1.4 m/s
0.5 m
IP20
PARV64L
1 Phase Induction
230 V
0.75/0.95 A
1.0/1.6 A
0.7 m/s
0.5 m
IP20
PARV61
3 Phase Induction
115V AC
1.3/1.1 A
2.0/1.6 A
0.7/1.4 m/s
0.5 m
IP20
PARV62D+
3 Phase Induction
220V AC
0.6/0.6 A
1.0/1.0 A
0.7/1.4 m/s
0.5 m
IP20
PARV81
3 Phase Induction
115V AC
1.5 A
8000 Controller
0.7/1.1/1.4
0.5 m
IP20
PARV82
3 Phase Induction
220V AC
1.1 A
8000 Controller
0.7/1.1/1.4
0.5 m
IP20
For protection it is recommended that the wiper system have fuses fitted. The fuses will not blow in
normal conditions, however if the wiper is jammed, then the fuses are designed to blow before the
motor is damaged. Each wiper requires its own fuse. Fuse values shown above.
Compass safe distances, BSH (Germany) certified, have the values shown above. The distance
quoted is the maximum figure for ‘Magnet-Regelkompass’.

3
Spray nozzles & water connections
A fresh water supply can be plumbed directly to the wiper into a 6mm overall diameter compression
fitting. On stroke lengths below 1015mm (single wiper) 915mm (twin wiper), 1 nozzle is fitted, above
1015mm (single wiper) 915mm (twin wiper), 2 nozzles are fitted at ¼ stroke + 137mm from either
end. The installer needs to provide pressurised water supply and the interconnecting
plumbing. When the wash option is installed, the maximum pressure for the system is 8 bar or 118
PSI and the minimum pressure for adequate spray reach is 1 bar or 15 PSI. Example flow rates for
a single spray jet are shown below.
Water System Pressure And Flow Rates
Pressure
Flow rate
Bar
Psi
Litres/min
Gallons/min
1.0
15
0.95
0.20
1.5
22
1.20
0.25
2.0
29
1.40
0.30
3.0
44
1.75
0.40
De-icing Heaters
Optional de -icing heaters may be fitted inside the wiper case to ensure effective operation in cold
conditions. As standard the heater cable is terminated inside the motor pod. Power consumption
is according to the wiper stroke length, shown below.
Heater Power Ratings –Single Wipers
STROKE
(mm)
STROKE
(inch)
HEATER
SIZE
WATTS
(24VDC)
STROKE
(mm)
STROKE
(inch)
HEATER
SIZE
WATTS
(24VDC)
305 up to 430
12 up to 17
1
97
1500 up to 1800
59 up to 71
8
390 (186)
457 up to 735
18 up to 29
2
135
1930 up to 2100
76 up to 83
10
485 (150)
760 up to 1095
30 up to 42
4
211
2260
89
12
574 (123)
1118 up to 1450
43 up to 57
6
301 (238)
Quoted Power is for nominal 115 or 230 Volts (bracketed values arefor 24 Volts). For stroke lengths
up to 1065 mm, power ratings are the same for all voltages.
Heater Power Ratings –Twin Wipers
OVERALL
STROKE (mm)
STROKE (inch)
HEATER
SIZE
WATTS
(24VDC)
OVERALL
STROKE (mm)
STROKE (inch)
HEATER
SIZE
WATTS
(24VDC)
585 up to 685
2 x 12 –2 x 15
2
135
1855 up to 2165
2 x 37 –2 x 43
10
485 (150)
735 up to 1042
2 x 16 –2 x 21
4
211
2210 up to 2565
2 x 44 –2 x 51
12
574 (123)
1091 up to 1445
2 x 22 –2 x 29
6
301 (238)
2645 and above
2x 53 –2 x 89
14
663 (106)
1495 up to 1805
2 x 30 –2 x 36
8
390 186)
Quoted Power is for nominal 115 or 230 Volts (bracketed values arefor 24 Volts). For stroke lengths
up to 1041 mm, power ratings are the same for all voltages.

4
TYPE D5 WIPER INSTALLATION
CAUTION: Ensure that the correct wiper, blade and arms are selected for each window.
CAUTION: Before drilling, ensure that there are no obstructions / hazards at the chosen
mounting position. The main frame should be mounted on a flat surface that will not bend or
twist the casing, as this will prevent correct operation of the wiper.
CAUTION: Where more than one wiper unit is to be mounted close together, allow a distance
of 70mm minimum between the wiper units.
Stud or Bracket Mounting
Stud Mounting Bracket Mounting
1. Locate the self-adhesive template in the correct mounting position on the outside of bulkhead
(stud mounting only).
NOTE: For motors mounted at the opposite end, the template should be inverted.
2. Drill the wiper 2 off fixing holes (11 mm diameter).
3. Detach the back casing from main unit. Hold the back casing in the required position and
mark-out the remaining fixing holes, or calculate their position from the drawing i.e. stroke
length plus 172 mm.
4. Drill the remaining wiper fixing & cable holes for the multi-way cable, ensuring that all holes
are circular and carefully de-burred. Treat bare metal to prevent corrosion.
5. Fit the wiper case into position and secure with M10 bolts. Ensure that the bolts are sealed
where they pass through the bulkhead.
6. Using the supplied M6 x 10mm screws, secure the wiper arm to the carriage plate.
CAUTION: Ensure the correct length screws are used, as supplied. Longer screws will cause
the carriage assembly to jam.
7. Bolt the front case to the back case using the 2 off M8 bolts fitted.
CAUTION: Do not overtighten the cover bolts. There should be 3mm
clearance between arm mounting plate and inside of wiper case.
8. If necessary, slacken the screws on the wiper blade attachment clip,
move the blade up or down for optimum position and then retighten
screws.
3

5
9. Move the wiper arm/blade assembly over its full stroke and check that there is no restriction to
movement (the motor will offer some resistance, but should not jam the wiper). Investigate
and rectify any restrictions. If necessary adjust the wiper blade up or down on the arm to avoid
the window frame.
10. Pass the cables through the bulkhead, leaving sufficient spare cable to allow the front
assembly to be lifted away from the rear case during the maintenance period. Ensure the
wiper is correctly earthed.
11. Ensure that wherever the cable passes through the bulkhead a suitable cable gland or seal is
used to prevent water ingress and cable chaffing.
Universal Carrier & Bracket Mounting
Universal Carrier & Bracket Mounting
1. Carefully mark the position of the 2 (3 for longer wipers) off universal carrier plates.
2. Prepare the bulkhead and universal carrier plates carefully and weld the 2 (or 3 for longer
wipers) universal mounting brackets into position. Treat bare metal to prevent corrosion.
3. Drill the remaining wiper fixing & cable holes for the multi-way cable, ensuring that all holes
are circular and carefully de-burred. Treat bare metal to prevent corrosion.
4. Fit the wiper case into position on the Universal Carrier studs and secure with supplied M10
spring washers, M10 flat washers and M10 nuts.
5. Using the supplied M6 x 10mm screws, secure the wiper arm to the carriage plate.
CAUTION: Ensure the correct length screws are used, as supplied.
Longer screws will cause the carriage assembly to jam.
6. Bolt the front case to the back case using the 2 off M8 bolts fitted.
CAUTION: Do not overtighten the cover bolts. There should be 3mm
clearance between arm mounting plate and inside of wiper case.
7. If necessary, slacken the screws on the wiper blade attachment clip, move the blade up or
down for optimum position and then retighten screws.
8. Move the wiper arm/blade assembly over its full stroke and check that there is no restriction to
movement (the motor will offer some resistance, but should not jam the wiper). Investigate
and rectify any restrictions. If necessary adjust the wiper blade up or down on the arm to avoid
the window frame.
3

6
9. Pass the cables through the bulkhead, leaving sufficient spare cable to allow the front
assembly to be lifted away from the rear case during the maintenance period. Ensure the
wiper is correctly earthed.
10. Ensure that wherever the cable passes through the bulkhead a suitable cable gland or seal is
used to prevent water ingress and cable chaffing.
Bracket Mounting –Quick Release Arms
Bracket Mounting
1. Mark out and drill the 4 (6 for longer wiper units) off fixing holes (11 mm diameter).
2. Mark out and drill the cable holes for the multi-way cable, ensuring that all holes are circular
and carefully de-burred. Treat bare metal to prevent corrosion.
3. The wiper unit should be supplied with the arm mounting plate
(4) already fitted. If it is not fitted, remove 2 x ¼ UNF Thin Nuts
(2) and 2 x M6 washers (3) from the pivot block threads and
remove the wiper arm sub assembly (5) from the arm mounting
plate (4). Fit the arm mounting plate (4) to the wiper unit before
installing the wiper unit using the supplied M6 x 10mm screws.
CAUTION: Ensure the correct length screws are used, as supplied. Longer screws will cause
the carriage assembly to jam.
4. Fit the wiper blade to the wiper arm sub assembly (5), ensuring that the
captive end of the wiper blade is at the top.
5. Bolt the front case to the back case using the 2 off M8 bolts fitted.
CAUTION: Do not overtighten the cover bolts. There should be 3mm
clearance between arm mounting plate and inside of wiper case.
6. Fit the wiper case into position and secure with M10 bolts. Ensure that the bolts are sealed
where they pass through the bulkhead.
7. Fit the wiper arm sub assembly (5) to the arm mounting plate (4) ensuring that the wiper arm
sub assembly pivot block nuts (6) sit inside the holes in the arm mounting plate (4). Refit the 2
x M6 washers (3) and 2 x ¼ UNF Thin Nuts (2) to the pivot block
threads and tighten.
8. Gently lift the wiper arm away from the window and remove the spring
retaining pin (1). Keep safe for future use.
3

7
9. If necessary, slacken the screws on the wiper blade attachment clip, move the blade up or
down for optimum position and then retighten screws.
10. Move the wiper arm/blade assembly over its full stroke and check that there is no restriction to
movement (the motor will offer some resistance, but should not jam the wiper). Investigate
and rectify any restrictions. If necessary adjust the wiper blade up or down on the arm to avoid
the window frame.
11. Pass the cables through the bulkhead, leaving sufficient spare cable to allow the front
assembly to be lifted away from the rear case during the maintenance period. Ensure the
wiper is correctly earthed.
12. Ensure that wherever the cable passes through the bulkhead a suitable cable gland or seal is
used to prevent water ingress and cable chaffing.
Universal Carrier & Bracket Mounting –Quick Release Arms
Universal Carrier & Bracket Mounting
1. Carefully mark the position of the 2 (3 for longer wipers) off universal carrier plates.
2. Prepare the bulkhead and universal carrier plates carefully and weld the 2 (or 3 for longer
wipers) universal mounting brackets into position. Treat bare metal to prevent corrosion.
3. Drill the remaining wiper fixing & cable holes for the multi-way cable, ensuring that all holes
are circular and carefully de-burred. Treat bare metal to prevent corrosion.
4. The wiper unit should be supplied with the arm mounting plate (4) already fitted. If it is not fitted,
remove 2 x ¼ UNF Thin Nuts (2) and 2 x M6 washers (3) from the pivot block threads and
remove the wiper arm sub assembly (5) from the arm mounting plate (4). Fit the arm mounting
plate (4) to the wiper unit before installing the wiper unit using the supplied M6 x 10mm screws.
CAUTION: Ensure the correct length screws are used, as supplied. Longer screws will cause
the carriage assembly to jam.
5. Fit the wiper blade to the wiper arm sub assembly (5), ensuring that the
captive end of the wiper blade is at the top.
6. Bolt the front case to the back case using the 2 off M8 bolts fitted.
CAUTION: Do not overtighten the cover bolts. There should be 3mm
clearance between arm mounting plate and inside of wiper case.
7. Fit the wiper case into position on the Universal Carrier studs and secure with supplied M10
spring washers, M10 flat washers and M10 nuts.
3

8
8. Fit the wiper arm sub assembly (5) to the arm mounting plate (4) ensuring that the wiper arm
sub assembly pivot block nuts (6) sit inside the holes in the arm mounting plate (4). Refit the 2
x M6 washers (3) and 2 x ¼ UNF Thin Nuts (2) to the pivot block threads and tighten.
9. Gently lift the wiper arm away from the window and remove the spring
retaining pin (1). Keep safe for future use.
10. If necessary, slacken the screws on the wiper blade attachment clip,
move the blade up or down for optimum position and then retighten
screws.
11. Move the wiper arm/blade assembly over its full stroke and check that there is no restriction to
movement (the motor will offer some resistance, but should not jam the wiper). Investigate
and rectify any restrictions. If necessary adjust the wiper blade up or down on the arm to avoid
the window frame.
12. Pass the cables through the bulkhead, leaving sufficient spare cable to allow the front
assembly to be lifted away from the rear case during the maintenance period. Ensure the
wiper is correctly earthed.
13. Ensure that wherever the cable passes through the bulkhead a suitable cable gland or seal is
used to prevent water ingress and cable chaffing.

9

10

11

12

13
GENERAL FAULT FINDING GUIDE
NOTE: This fault finding guide assumes a reasonable level of technical ability and should be
carried out by a suitably qualified person.
Problems: Control panel does not operate wiper.
Possible Cause
Solution
No Power. Check power supply is on and working.
Power not reaching motor Check ship's incoming supply fuses or circuit breakers.
Check for wiring fault, broken wire or loose terminal.
If possible confirm (with voltmeter) power is present at motor
input and output terminals of control module.
Connections to motor incorrect.
Check wiring according to the appropriate electrical installation
drawing.
Ship's voltage too low.
Check voltage as close to the motor as possible, with motor
running. See relevant tables for acceptable values.
Motor Thermal Cut Out tripped.
Single Phase AC motors only.
The 1 Ø AC motors have a thermal cut out embed
ded into the
stator winding. If the motor gets too hot the thermal cut out
disconnects the supply to the motor. Switch off and allow the
motor to cool down. About 20 minutes later the cut out will reset
allowing normal operation.
Motor brushes or commutat
or
worn (DC motor only)
Check motor commutator and brushes
Motor burned out. This should not be possible -
could happen by incorrect voltage
of motor, or a motor fault.
The motor needs a reasonable amount of free space to provide
sufficient cooling airflow – check.
The motor should be protected by fuses, check type and rating.
Wiper motor not fully engaged
on coupling.
Slacken pinch bolt, move motor and/or wiper arm to align
coupling and push motor into engagement with coupling.
Retighten pinch bolt. Make sure that the rubber coupling is fitted
Carriage motion jammed.
It should be possible by pushing the blade arm to move the
mechanism over the stroke length. Remove cover and check for
obstructions. Check the Blade Arm Screws.
Drive pulley turning but
belt
slipping.
Excessive friction -
Check carriage rollers and motor drive
coupling. Replace as required.
Idler pulley springs broken or missing. Replace.
Drive belt broken or damaged. Inspect belt for slip or burn damage.
Belt at end of life. Replace.
Idler pulley jammed.
Damaged by impact, or bearing system failed. Replace
assembly.
Corrosion.
If corroded, check for water ingress through seals and tightness
of connections,
Replace wiper unit if necessary

14
Problem: Wiper runs but at wrong speed
Po
ssible Cause
Solution
Ship's voltage incorrect.
Check voltage as near as possible to the motor, with motor
running.
Motor brushes worn (DC Only) Inspect brushes and replace as necessary.
High / Low speed wiring
incorrect
(3 Phase 2 Speed models
only)
Check wiring complies with appropriate drawing.
One phase missing
(3 Phase 2 Speed models
only)
Check controller.
Check ships fuses.
Problem: Wiper runs but is noisy
P
ossible
Cause
Solution
Wiper arm is obstructed by: -
Window frame, spray jets, etc.
If necessary gently bend arms or spray jets out of path of wiper
arm.
Incorrect arm attachment
screws.
These must not be longer than the 10mm screws provided by
Wynn
Vibration of wiper unit Check the front cover fixing screws are secure.
Arm attachment plate fouling
on wiper case
Attachment screws not fully tightened - check.
Blade arm or bracket bent out of place - check.
Problem: Wiper does not clean the screen properly.
Possible Cause
Solutions
Blade not in contact with
screen.
Blade or arm bent - inspect and replace.
Arm pivots seized due to corrosion - replace.
Heaters ineffective allowing ice build up.
Weak springs on blade arm. Stronger springs may be required. Contact Agent/Distributor
Broken springs on blade arm. I
nvestigate reason of failure and replace. Springs are good down
to -40°C.
Blade rubber missing or
damaged.
Maintenance item. Replace as required.
Problem: Wiper does not park correctly
Possible Cause
Solution
Park Sensor failed. Check reed sensor action, will need tester (meter).
Park Sensor Actuator missing. Check magnet/spacer arrangement on carriage.

15
Problem: If fitted, heater does not become warm when switched on
Possible Cause
Solutions
Fuse blown or circuit breaker
tripped (if fitted).
Check for short-circuited heater, will need tester (meter).
Check for wiring damage or loose wires.
Check connections are good.
Heater failed. Check for continuity, will need tester (meter).
Earth leakage circuit breaker
trips.
It is common for earth leakag
e to rise if a heater has not been
used for a while -
if possible allow heater the warm up so to dry
out.
The heater's water seal or cable may be damaged allowing
ingress of water - check and replace.
No power. Check Controller.
Problem: If fitted, little or no washer water comes out when button pressed.
Possible Cause
Solution
Pump or supply pressure too
low.
Check Ship's water supply, or pump for output pressure.
On reservoir systems, empty. Check - refill.
Water control valve faulty or
not operating.
Check solenoid valve continuity. Replace if open circuit.
Supply lines or jets blocked. Try air purge, if available.
Dismantle and flush pipes.
Water frozen. Switch on heaters.

16
TYPE D5 WIPER MAINTENANCE
Wynn products have been proven over many years to perform well under the harshest condition of
use. No specialist tools are supplied. To maintain their performance the following schedule is
recommended:
TOOLS REQUIRED:
I. TORQUE WRENCH WITH 6MM ALLEN KEY SOCKET
II. TORQUE WRENCH WITH 17MM SPANNER
III. TORQUE WRENCH WITH 22MM SPANNER
IV. TORQUE WRENCH WITH 24MM SPANNER
V. 4MM ALLEN KEY
VI. 5MM ALLEN KEY
VII. 6MM ALLEN KEY
VIII. 6MM SOCKET
IX. 8MM SPANNER
X. 10MM SPANNER
XI. 10MM SOCKET
XII. 11MM SPANNER
XIII. 14MM SPANNER
XIV. 3MM FLAT BLADE SCREWDRIVER
XV. NO2 CROSS POINT SCREWDRIVER
Every 6 Months
DC motors only
1. Inspect the motor brushes. Remove motor end cover. Prevent brushes from running down to
less than 6mm height in service. Brushes can be lifted out of their holder after lifting off the
springs. Replace brushes back into same holder and in the same orientation. Ensure that the
brush ‘pig tails’ is free and that the springs are correctly replaced.
2. When replacing brushes, carefully clear out any residual carbon dust from the motor.
WARNING: DO NOT INHALE THE CARBON DUST.
3. Inspect the motor commutator –it should still be bright. If it is blackened the motor should be
replaced or serviced. This can be done with light cleaning with ‘flour’ paper, but not ‘emery’
paper.
Every 12 Months
1. Check condition of the Articulated/Rigid Wiper Blade. Replace if necessary.
2. Check the motor pod case bolts are tightened to a torque of 12-14NM.
3. Check the cable entry gland nuts are tightened to the following torque:
Motor - 5NM
Heater - 4.2NM
Sensor - 4.2NM
4. Check Heaters if fitted. If these have not been used for some time, then leave them on for
approximately 2 hours.
NOTE: If not used for long periods, some mineral insulated heaters will take up moisture and
begin to show current leakage to ground. By running them for the stated time this process can
be reversed and the insulation returned to near infinity values. When dry, insulation resistance
is > 100 M ohm at 500V.

17
5. Check the drive belt for deterioration. Replace if necessary.
6. Check carriage is smooth and all guide rollers are free to rotate. Inspect ‘tyres’ on the guide
rollers for splitting / perishing. Replace complete roller if necessary. Special spanner is
supplied with set of 8 guide rollers.
Caution: Guide rollers have an integral dry bearing and MUST NOT be oil or grease
lubricated.
7. Check for free movement of idler pulleys in response to belt tension. Lubricate as necessary
with water resistant grease.
8. Ensure free movement of drive pulley. Replace if damaged or when showing signs of
excessive wear.
NOTE: The drive pulley is jig assembled and should not be dismantled.
9. Check for free blade arm spring movement. Dismantle, re-grease or replace if necessary.