SL0015 Treating Shorting Angle Sensors on SL units

SL0015 PDF File

SMARTlift Service Info

Version 2

Date: 30 Oct 2007

Issue

If the angle sensor plug is not tightly assembled, damp or wet weather can effect the reliability of angle sensors on SMARTlift units. Symptoms include Angle Sensor Error messages appearing on the Display Screen, and stability error messages when the stability is clearly not a factor.

If there is any visible corrosion or moisture ingress then the plug should be replaced

A preventative fix for undamaged sensors is to ensure that they are correctly tightened so no moisture can enter.This service info explains how to protect the sensors from moisture entering inside the housing.

Part Number:

The sensor in issue is EL-34171. Please note, if replacing this part, please order EL-37699 which has been resin injected to prevent moisture penetrating. (refer TB0060)

Procedure:

  • Unscrew the cable gland nut from the connector back shell then unscrew the connector plug from the connector back shell.

    The plug will now look as it does in Fig 1.

Take care not to twist the wires too much as they may break.

SL0015_3.jpg

 

Fig 1 Shows the plug disassembled.

  • Spray the wire side (as shown in Fig 2) of the plug with electrical contact spray, ensuring all wires and connectors are well coated with spray.
  • Check that Connector seal is present and seated correctly. This is the O-ring sitting between the outer and inner housings (shown on Fig 2)

SL0015_2.jpg

 

Fig 2 Wire Side

  • Screw connector plug back onto the back shell, ensuring that it is screwed in completely.

    Fig 3 shows a correctly fastened plug, and one incorrectly fastened where thread is still showing. The connector seal causes the last few turns to have a much higher resistance so it is important to ensure the plug is securely screwed all the way home.

SL0015_5.jpg

 

Fig 3

  • Slide the gland back into the plug then screw in the gland nut. This may require more torque to screw home than just finger tight and tools may be required in some instances

    Fig 4 shows the correct and incorrect amounts of thread showing after screwing the nut home.

SL0015_4.jpg

 

Fig 4

SBcaution

When screwing the connector plug into the mating socket always check that the back shell has not become unscrewed at the same time.