Z326 Wheel Autopilot Drive

Product Information

Specifications

• Product Name: Z326, Wheel Autopilot Drive
• Model Number: ST4000+
• Service Manual Number: 83115-1
• Fuse/CB: 12A
• Power Supply: 12V, 15A

Chapter 3. Wheel Drive Actuator

The Wheel Drive Actuator is a component of the Z326 Autopilot
Drive system. It is responsible for controlling the movement of the
wheel in order to steer the vessel. The actuator undergoes various
tests to ensure its proper functioning.

Wheel Drive Actuator Test

To test the Wheel Drive Actuator, follow the steps below:

1. Visually inspect the unit for any damages. If damaged
   components are found, they need to be changed.

2. Rotate the drive ring by hand with the clutch disengaged. Check
   the gears, belt, rollers, belt tension, eccentric, drive lever, and
   motor. Change or adjust them as necessary.

3. Check the resistance across the motor connector pins 2 and 3.
   It should be approximately 1 to 2 ohms. If not, check the wiring
   and connector.

4. Connect the power supply as shown in Figure 5.

5. Switch on the power supply and check if the drive ring moves
   and the current is less than 2A with the clutch engaged. If not,
   check the gears, belt, rollers, belt tension, eccentric, drive
   lever, and motor. Change or adjust them as necessary.

6. Restrain the drive ring rotation until 6.5A is obtained. Check
   that the belt does not slip.

7. If the previous test fails, reverse the polarity of the power
   supply. Switch on and check if the drive ring moves in the opposite
   direction to the first test and the current is less than 2A. If
   not, check the gears, belt, rollers, belt tension, eccentric, drive
   lever, and motor. Change or adjust them as necessary.

8. If all the tests pass, the Actuator is considered to be
   OK.

Wheel Drive Actuator Spare Parts List

The following are the spare parts for the Wheel Drive
Actuator:

gearbox, item 23
5| Belt| D169| Pinion kit, including
7| Pinion sprocket| |
15| Protection cap| |
19| Pin| |
20| Shim (x2)| N014| Drive lever kit, including
8| Roll pin| |
9| Drive lever| N011|
11| Drive eccentric assembly| N024| Gearbox drive shaft/gear carrier ‘C’ kit, including
21| Gearbox drive shaft/gear carrier ‘C’| |
Planet gear (x12)| | |
Shim| | |
‘O’ ring| | N026| See Figure 8, item 3 See Figure 8, item 4 See Figure 8, item 2
See Figure 8, item 1

FAQ

Q: What should I do if the Actuator fails any of the

tests?

A: If the Actuator fails any of the tests, you should check the
gears, belt, rollers, belt tension, eccentric, drive lever, and
motor. Change or adjust them as necessary.

Q: How do I know if the Actuator is functioning properly?

A: The Actuator is considered to be functioning properly if it
passes all the tests mentioned in the user manual.

Z326, Wheel Autopilot Drive Service Manual
Wa rning
CE Marking of Equipment/Replacement Parts
If the Autohelm equipment under repair, test, calibration, installation or setting to work carries the European CE mark, only parts and components supplied or approved for such use by Raytheon should be used in order to maintain compliance with the relevant CE requirements.
Incorporation, use or attachment, by any means, of parts or components not supplied for or not approved for such use by Raytheon or, if supplied or approved for use by Raytheon, not properly fitted in accordance with instructions published,
provided or recommended by Raytheon, may cause the equipment to malfunction and, in particular, to become unsafe or to no longer meet the relevant CE requirements. In these circumstances, Raytheon Marine Europe Ltd excludes liability
to the fullest extent permissible in law for any loss or damage including any liability for its contribution to such loss or damage by its negligent acts or omissions .
ST4000+ Autopilots Service Manual 83115-1

ST4000+ Autopilots Service Manual 83115-1

Contents
Contents
Chapter 3. Wheel Drive Actuator …………………………………………………………………………….. 11 3.1 Wheel Drive Actuator test…………………………………………………………………….. 11 3.2 Disassembly/assembly ……………………………………………………………………….. 12 Wheel Drive Actuator spare parts list …………………………………………………… 13 Disassembly ………………………………………………………………………………….. 14 Belt removal …………………………………………………………………………… 14 Pinion sprocket removal ……………………………………………………………. 14 Drive lever and eccentric removal ………………………………………………… 14 Motor removal ………………………………………………………………………… 14 Gearbox removal …………………………………………………………………….. 15 Gearbox disassembly ……………………………………………………….. 15 Assembly ……………………………………………………………………………………… 16 Gearbox assembly…………………………………………………………………… 16 Motor assembly ………………………………………………………………………. 16 Adjustment eccentric assembly ………………………………………………….. 16 Drive lever and eccentric assembly ……………………………………………… 17 Pinion sprocket and belt assembly ………………………………………………. 17 Drive ring closure …………………………………………………………………….. 17 3.3 Setting Belt Tension ……………………………………………………………………………. 18 Tools required: ……………………………………………………………………………….. 18 Motor drive box ………………………………………………………………………………. 18 Motor drive box parts ……………………………………………………………….. 19 Procedure ……………………………………………………………………………………. 19
ST4000+ Autopilots Service Manual 83115-1

Chapter 3. Wheel Drive Actuator
Chapter 3. Wheel Drive Actuator
3.1 Wheel Drive Actuator test
Carry out the passive and active tests detailed in Figure 6.

Fuse/CB 12A
Switch

Figure 5.Wheel Drive Actuator test connections

PSU 12V 15A

D2386-1

Start Visually inspect unit
No OK
Yes

Change damaged components

Rotate drive ring by hand with clutch disengaged

No OK
Yes

Check gears, belt, rollers, belt tension, eccentric, drive lever, motor
Change/adjust as necessary

Check resistance across motor connector pins 2 and 3 is approximately 1 to 2 ohms

No OK
Yes

Check wiring and connector
No OK
Yes Check motor

Change as necessary

Connect power supply as in Figure 5

Switch on, and with clutch engaged, check drive ring moves and current is less
than 2A

No OK
Yes

Check gears, belt, rollers, belt
tension, eccentric, drive lever, motor
Change/adjust as necessary

Restrain drive ring rotation until 6.5A is obtained. Check
that belt does not slip.

No OK
Yes Reverse polarity of supply

Switch on.Check drive ring moves in opposite direction
to that of first test and current is less than 2A

OK No Yes

Check gears, belt, rollers, belt
tension, eccentric, drive lever, motor
Change/adjust as necessary

Restrain drive ring rotation until 6.5A is obtained. Check
that belt does not slip.

Figure 6.Wheel Drive Actuator test flowchart

OK No
Yes Actuator OK. End of test

D2390-1
11

12

Chapter 3. Wheel Drive Actuator

Wheel Drive Actuator spare parts list
The item numbers refer to Figure 7: Wheel Drive A ctuator exploded view

Item

Spare Description

Part No. Comments

1

Drive ring

N031

2

Back mounting plate assembly

N013

Comes fitted with,

pre-assembled

gearbox, item 23

5

Belt

D169

Pinion kit, including

7

Pinion sprocket

15

Protection cap

19

Pin

20

Shim (x2)

N014

Drive lever kit, including

8

Roll pin

9

Drive lever

N011

11

Drive eccentric assembly

N024

Gearbox drive shaft/gear

carrier `C’ kit, including

21

Gearbox drive shaft/

gear carrier `C’

­

Planet gear (x12)

­

Shim

­

`O’ ring

N026

See Figure 8, item 3 See Figure 8, item 4 See Figure 8, item 2 See Figure 8, item 1

27

Motor

N012

Wiring kit, including

28

Motor clamp

29

Motor clamp `O’ ring

30

Connector

31

Connector seal

33

End cap `O’ ring

34

End cap

35

Sealing cap

36

Connector nut

37

Cable assembly

Q106

13

14

Chapter 3. Wheel Drive Actuator
5. Desolder connector wires from the motor tags.
Gearbox removal
Refer to Figure 7. Wheel Drive Actuator exploded view. 1. Perform actions as described in Pinion sprocket removal,
and 1, 2, 3 and 4 in Motor removal. 2. Unscrew and remove the four gearbox retaining screws (22). 3. Separate the gearbox ( 23) from the back mounting plate assembly (2)
leaving the gearbox drive shaft/gear carrier C’ (21) in place. 4. Support the gearbox drive shaft/gear carrierC'(21) and drive out the pin(19). 5 Withdraw the gearbox drive shaft/gear carrier `C’ (21) from the back
mounting plate assembly (2).
Gearbox disassembly

8 5 5 4
7
5 5 4 5 4 6
7
1. ‘O’ ring 2. Small shim spacer 3. Drive shaft/carrier assembly ‘C’ 4. Planet gear (x22)
Figure 8. Gearbox exploded view

5 5 4 4
3
2 1
5. Large shim spacer (x7) 6. Carrier assembly ‘B’ 7. Carrier assembly ‘A’ (x2) 8. Gear housing
D3725-1

15

16

Chapter 3. Wheel Drive Actuator
Drive lever and eccentric assembly
Refer to Figure 7. Wheel Drive Actuator exploded view. 1. Assemble the drive eccentric assembly (11) and drive wheel assembly
(10) to the back mounting plate assembly (2). 2. Slide the drive lever (9) onto the drive eccentric assembly (11). Support
the drive lever (9) and insert the roll pin (8). Note: Always use a new roll pin (8) on refit.
Pinion sprocket and belt assembly
Refer to Figure 7. Wheel Drive Actuator exploded view. 1. Slot the pinion sprocket (7) over the gearbox drive shaft (21) and pin (19). 2. With the drive lever (9) in its slack (declutched) position and the
adjustment eccentric assembly (12) is in its lowest position fit the belt (5) around the pinion sprocket (7), drive wheel assembly (10) and adjustment wheel assembly (13). 3. Position the support plate (4) with fitted bearing (6) onto the gearbox drive shaft (21), drive eccentric assembly (11), adjustment eccentric assembly (12) and over the screw pillars. Insert the five screws (3) and secure the support plate (4). Note: Take care not to cut new threads in the screw pillars when securing the support plate (4).
Drive ring closure
Refer to Figure 7. Wheel Drive Actuator exploded view. 1. Rest the drive ring (1) over the rollers (18). 2. Locate the rollers (18) nearest the gearbox (23) into the groove of the
drive ring (1). Push down and around the drive ring (1) to progressively snap the drive ring (1) over the remaining rollers (18). 3. Spin the drive ring (1) in both directions, two or three times, too ensure the assembly is fully seated and free running.
17

18

Chapter 3. Wheel Drive Actuator

Motor drive box parts

Component R1 R2 R3 C1 C2 C3 C4 D1 IC1 F1
SW1

Description

Resistor 121R 0.1% metal film

Resistor 845R 0.1% metal film

Resistor 1k0 0.5W

Capacitor 4700uF 20% electrolytic 25V

Capacitor 4.7uF 10% solid tantalum 35V

Capacitor 22uF 10% solid tantalum 35V

Capacitor 4.7uF 10% solid tantalum 35V

Diode

MR 752

LM396K High power 10A regulator

Fuse

15A quick blow

Fuseholder 1.1/4 inch

Switch

Single pole single throw

TO3

Insulating kit

Diecast box

Proc e dure
1. Screw the drive ring clamp to the front ring. Use the group of two holes on their own, not two holes in a group of four. Screw the torque restraint pin into the back mounting plate
2. Connect the motor to the motor drive box, using an in – line ammeter (0 10 amps) to measure current
3. Connect the motor drive box to a 12V battery.The drive box provides a regulated 10.5V supply to the motor
4. Engage the drive unit clutch
5. Use the eccentric adjuster to loosen (anti – clockwise) the locking nut and allow the eccentric to move to the minimum tension position
6. Switch on the drive to the motor and, using a 1.5mm Allen key, rotate the eccentric anticlockwise (as viewed from above) to increase belt tension until the belt just stops slipping (motor stalled)
7. Check that the motor current is approximately 6.5 amps
8. Tighten the locking nut, apply Loctite to retain the setting and switch off the motor drive.

19

Read User Manual Online (PDF format)

Read User Manual Online (PDF format)  >>

Download This Manual (PDF format)

Download this manual  >>