CPT CPT Manuale operativo - Pagina 16

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hose-clamps & bracket have not slipped on pedestal. For heavy wheel loads or reversed pedestal

installations the bracket should be directly fastened to the pedestal with fasteners. If heavy loads cause

the motor to flex the mounting, so the belt slackens & slips, a belt tensioner will keep the belt tensioned

and absorb shock loads from large rudders. High tension makes the clutch harder to operate.

Belt Slips, Loose

Tighten belt to be snug by holding drivebox downward firmly while tightening wing nuts; tensioning tools are

not needed and should not be used. Check to be sure the wheel pulley is centered on the wheel shaft (This can

slip off-center after installation). Check to be sure both pulleys are in alignment as the pedestal mount can

also shift after installation.

Clutch Disengages

Motor unit is tilted so the drive pulley shaft is not parallel to the wheel shaft, and belt tension is disengaging

the clutch. Pulleys must be aligned and parallel when the clutch is engaged. If in doubt or the wheel is not

uniform favor a slight belt slant that will help keep the clutch engaged.

The setscrew recessed into the drive pulley-gear adjusts the ball bearing friction in the clutch. Slightly

tightening this screw will lock the clutch more securely in position; tightening too much will make the

clutch difficult to disengage. This normally does not need adjustment unless the screw has worked

loose or there has been extensive wear. Use a little Lock-tight if the screw has worked loose.

Shear Pin breakage

Be sure all excess friction is removed from the steering system. Steering linkage with excessive play can transfer

sudden shock loads from the rudder directly to the shear pins. Be sure the wheel adapter is basically centered on

the steering wheel. Vessels with excessive rudder shock loads will benefit from use of a belt tensioner which acts

as a shock-absorber.

If the tip of a broken shear pin is not removed, it may get lodged behind the driveplate and cause a screeching

sound behind the clutch. Remove the clutch & driveplate to remove the broken tip.

A worn clutch pulley with excessive hub wear will no longer rotate on center & be wobbly, transferring belt

tension to the shear pins instead of the drive shaft & shortening shear pin life; contact us for a replacement pulley

gear. To prolong the life of the clutch and shear pins when hand steering, loosen tension or remove the belt from

the small pulley, and hang the belt on over the binnacle or wheel shaft. Clean and lubricate clutch on a regular

basis.

CPT Steers When Windy And Rough, Not In Calm

This is usually an indication of excess play in the boat's steering system. Excess play in the wheel MUST be

removed. Shock loading from excessive play in the steering can be hard on shear pins. Air in hydraulic

steering systems can cause more than 10 degrees play at the wheel; the effect will be similar to operating the

pilot at a higher deadband setting. Be sure deadband is at a low setting in calm water.

Poor Power Connections & Voltage drop:

Just checking for 12v at the line is not enough; voltage drop will only show while pilot motor runs & draws

current. Small drive-pulley may barely turn or vibrate with excessive voltage drop in power line. With the

belt removed you should not be able to stop the small drive pulley with your hand. Also, if 12v power is

interrupted, the CPT will not hold a heading during a 45-60 second warm-up. Loose power connections can

cause the unit to intermittently turn off and power-up again, initiating recurring warm-up and heading loss.

HF Radios, Iron objects, Magnetic Interference:

Winch handles, screw drivers, knives, and other objects with steel/iron parts can alter the sensor heading if

placed too close to the sensor. The CPT sensor cable and aluminum enclosures are shielded to the mounting

brackets; for increased RF protection, it is recommended the pedestal or guardrail be grounded. Ham radios

and SSB radios should be properly choked and grounded, and be used at 50% transmit power to limit effects

and stress on all electronics onboard. Generally, SSB transmissions will not immediately affect the CPT, but