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Installing
and Routing Cables
Mechanical
cables have moving parts, and so they are always subject to wear. That
is why they will have to be replaced from time to time. You can
dramatically reduce the wear and increase the effective life of a
mechanical cable however by following a few simple rules....
The
condition of the flexible drive to a great extent controls the
performance of the speedometer or revolution indicator, and poor
installation or subsequent damage to the flexible drive will be shown
up as an apparent Instrument fault.
It is, therefore, important that the flexible drive be
correctly fitted and properly maintained.
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Smooth Run
The
run of the flexible drive must be smooth.
The minimum bend radius is 6” with no bend within 2”
of connections.
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Securing
Avoid
rushing the flexible drive by over-tightening the clip.
Flex can be crushed between moving components.
Avoid sharp bends as clips, if necessary, alter the
position of the clips. Excessive
free movement of the flexible drive should be avoided.
Fit extra clips if necessary.
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Connection
Ensure
that the threaded end connections are secure with no looseness
of the outer casing end collars.
Connecting nuts should be tightened by hand.
Spanners or pliers should not be used.
It is important that the drive to which the flexible
drive connects is free from dirt and grit.
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Connection
of inner flex
Where
possible, slightly withdraw the inner flex and connect outer
casing first to point of drive.
Then slide inner flex into engagement from the other end.
It may be necessary to rotate the flex.
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Removal of Inner Flex
Most
inner flexes can be removed by disconnecting the instrument end
and pulling out the flex. Some
must be removed from point of drive end after first taking off C
washer at instrument end. The
broken inner flex will have to be withdrawn from both ends.
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Checking the Inner Flex
Lay
the flex straight out on a flat clean surface and roll.
Any kinks or obvious signs of damage will be seen.
Take an end in each hand, allowing the flex to hang in a
loop approximately 9” diameter and rotate it slowly with the
fingers. A
satisfactory flex will run smoothly without snatching.
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Lubrication of Replacement Inners
Apply
grease sparingly to replacement flex.
Feed flex back into its casing then withdraw
approximately 8” and wipe off surplus grease.
Use SHELL SB2628 Grease. Do not use oil.
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