KVH Industries TracVision M9 Guide

KVH, TracVision, and the unique light-colored dome with contrasting baseplate are registered trademarks of KVH Industries, Inc.
All other trademarks are property of their respective companies. The information in this document is subject to change without notice.
No company shall be liable for errors contained herein. © 2008 KVH Industries, Inc., All rights reserved. 54-0534 Rev. A
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These instructions explain how to replace the skew motor or skew motor belt in a TracVision
M9 antenna.
Installation Steps
Tools Required
This procedure requires the following tools:
Technical Support
If you need technical assistance, please contact KVH Technical Support:
Skew Motor Replacement Instructions
1. Remove the Radome, 2
2. Remove the Feed Tube and Reflector
Bracket, 2
3. Measure the Current Belt Tension, 3
4. Replace the Motor, 3
5. Set the Belt Tension, 3
6. Reinstall the Reflector Bracket and Feed
Tube, 4
Skew Motor Belt Replacement Instructions
1. Remove the Radome, 5
2. Remove the Feed Tube and Reflector
Bracket, 5
3. Replace the Belt, 6
4. Set the Belt Tension, 6
5. Reinstall the Reflector Bracket and Feed
Tube, 6
• Phillips screwdrivers
• 5/64" Allen key
• 3/32" Allen key
•Tensionmeter
• 7/16" open-end wrench
N. America, S. America, Australia:
Phone: [phone]
E-mail: [email protected]
Europe, Middle East, Asia:
Phone: [phone]
E-mail: [email protected]
Skew Motor/Belt Replacement Instructions
for TracVision®M9

2
Skew Motor Replacement Instructions
Follow the steps below to replace the skew
motor.
Step 1 - Remove the Radome
Follow the steps below to remove the radome.
a. Disconnect power from the TracVision
system and any connected receivers and/or
multiswitch.
b. Remove the eight Phillips screws securing the
radome (see Figure 1). Then remove the
radome and set it aside in a safe place.
Step 2 - Remove the Feed Tube and Reflector
Bracket
Follow the instructions below to remove the feed
tube and reflector bracket.
a. Using a 5/64" allen key, loosen the two
screws securing the feed tube to the reflector
(see Figure 2). Then remove the feed tube and
set it aside in a safe place.
b. While holding in place the reflector bracket
located on the rear of the reflector (see
Figure 3), use a Phillips screwdriver to
remove the six screws and washers securing
the reflector bracket in place (see Figure 2).
CAUTION
For your own safety, be sure to disconnect
power from all wired components before
performing this procedure.
Figure 1 Radome Screws
Figure 2 Feed Tube/Reflector Bracket Screws
Figure 3 Reflector Bracket
#10-32 Screw (x8)
Baseplate
Radome
Feed Tube
Reflector Bracket
Screws and
Washers (x6)
Feed Tube
Screws (x2)
Reflector
Bracket

3
Step 3 - Measure the Current Belt Tension
Use a tension meter to measure and record the
current skew motor belt tension (see Figure 4).
You will need to reset the belt tension to this
measurement later.
Step 4 - Replace the Motor
Follow the steps below to replace the skew
motor.
a. Disconnect the motor cable from the motor
(see Figure 4).
b. Using a 3/32" allen key, remove the four
screws and washers securing the skew motor
(see Figure 4) to the reflector bracket.
c. Gently slide the motor hub to relieve belt
tension. Then extract the motor.
d. Insert the new motor into place. Use the four
screws and washers you removed in Step b to
loosely fasten the skew motor to the reflector
bracket.
e. Connect the motor cable to the motor.
Step 5 - Set the Belt Tension
Follow the steps below to set the belt tension.
a. Using a tension meter, slide the motor hub as
necessary to achieve the reading you
measured in “Step 3 - Measure the Current
Belt Tension.”
b. Tighten the motor screws once you achieve
the correct tension.
Figure 4 Skew Motor Belt, Screws, and Washers
Motor Screw
and Washer (x4)
Cable Connector
Belt
Motor
Hub

4
Step 6 - Reinstall the Reflector Bracket and Feed
Tube
Follow the instructions below to reinstall the feed
tube and reflector bracket.
a. Properly align the reflector bracket to the
reflector (see Figure 5).
b. Secure the reflector bracket into place using
the six screws and washers you removed in
Step 2b. on page 2 (see Figure 6).
c. Reinstall the feed tube fully into the choke
feed. Then tighten the two 5/64" allen screws
to secure it in place (see Figure 6).
d. Reinstall the radome. Then restore power to
the TracVision system and any connected
receivers and/or multiswitch.
The procedure is complete!
Figure 5 Reflector Bracket Alignment
Figure 6 Feed Tube/Reflector Bracket Screws
Parallel to
Antenna Base
Feed Tube
Reflector Bracket
Screws and
Washers (x6)
Feed Tube
Screws (x2)

5
Skew Motor Belt Replacement Instructions
Follow the steps below to replace the skew motor
belt.
Step 1 - Remove the Radome
Follow the steps below to remove the radome.
a. Disconnect power from the TracVision
system and any connected receivers and/or
multiswitch.
b. Remove the eight Phillips screws securing the
radome (see Figure 7). Then remove the
radome and set it aside in a safe place.
Step 2 - Remove the Feed Tube and Reflector
Bracket
Follow the instructions below to remove the feed
tube and reflector bracket.
a. Using a 5/64" allen key, loosen the two
screws securing the feed tube to the reflector
(see Figure 8). Then remove the feed tube and
set it aside in a safe place.
b. While holding in place the reflector bracket
located on the rear of the reflector (see
Figure 9), use a Phillips screwdriver to
remove the six screws and washers securing
the reflector bracket to the reflector (see
Figure 8).
CAUTION
For your own safety, be sure to disconnect
power from all wired components before
performing this procedure.
Figure 7 Radome Screws
Figure 8 Feed Tube/Reflector Bracket Screws
Figure 9 Reflector Bracket
#10-32 Screw (x8)
Baseplate
Radome
Feed Tube
Reflector Bracket
Screws and
Washers (x6)
Feed Tube
Screws (x2)
Reflector
Bracket

6
Step 3 - Replace the Belt
Follow the steps below to replace the skew motor
belt.
a. Using a 3/32" allen key, loosen but do not
remove the four screws and washers securing
the skew motor in place (see Figure 10).
b. Using a Phillips screwdriver, remove the
screw securing the choke feed to the reflector
bracket (see Figure 10).
c. Slide the motor hub to relieve belt tension
and extract the belt (see Figure 11).
d. Work the new belt over the choke feed pulley
and motor hub. Ensure the teeth engage the
belt.
Step 4 - Set the Belt Tension
Follow the steps below to set the belt tension.
a. Using a tension meter, slide the motor hub as
necessary to achieve a 400-500 Hz
(3.1 -4.8 lbs) reading.
b. Tighten the motor screws once you achieve
the correct tension.
Step 5 - Reinstall the Reflector Bracket and Feed
Tube
Follow the instructions below to reinstall the feed
tube and reflector bracket.
a. Secure the reflector bracket onto the choke
feed using the screw you removed in Step 3b.
(see Figure 10).
Figure 10 Choke Feed/Motor Screws
Figure 11 Belt Routing
Motor Screw
and Washer (x4)
Belt
Choke Feed
Screw
Choke Feed
Choke Feed
Pulley
Motor Hub

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b. Properly align the reflector bracket to the
reflector (see Figure 12).
c. Secure the reflector bracket into place using
the six screws and washers you removed in
Step 2b. on page 5 (see Figure 13).
d. Reinstall the feed tube fully into the choke
feed. Then tighten the two 5/64" allen screws
to secure it in place (see Figure 13).
e. Reinstall the radome. Then restore power to
the TracVision system and any connected
receivers and/or multiswitch.
The procedure is complete!
Figure 12 Reflector Bracket Alignment
Figure 13 Feed Tube/Reflector Screws
Parallel to
Antenna Base
Feed Tube
Reflector Bracket
Screws and
Washers (x6)
Feed Tube
Screws (x2)