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 Lh107 4x4 actuator diaphragm

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Southwestsupertripper
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Number of posts : 2
Home City : Sisters beach
Registration date : 2017-12-18

PostSubject: Lh107 4x4 actuator diaphragm    Sun Mar 11, 2018 6:31 am

G'day guys, it seems my actuator that bolts onto the side of my transfer case isn't working,
Is there anyway I can test it ? I have unbolted the inspection plate and manually put it in 4x4 but it won't go in by itself.

Any experience or idea would be great. Cheers jobi
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Hiace4wd
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Number of posts : 662
Home City : Netherlands
Model and year : 1994 Toyota Hiace 4x4 DIY camper
Registration date : 2016-02-01

PostSubject: Re: Lh107 4x4 actuator diaphragm    Mon Mar 12, 2018 9:50 am

It is actuated by the vacuum of the vacuum pump on the alternator.
So you would need to check if the vacuum is available on the actuator (that the tube doesn't have a problem).
Then check if the vacuum electric valves work. I think they should at least click, when engine is off and button is pressed (and key in ON position)

The vacuum source is easily broken when you place a 2wd vacuum pump or something like that.
That is what happened to my van, and I had to remove the right front seat, remove the panel under the seat, and then I could place a T connector to hook up the vacuum again.
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Southwestsupertripper
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Number of posts : 2
Home City : Sisters beach
Registration date : 2017-12-18

PostSubject: Re: Lh107 4x4 actuator diaphragm    Tue Mar 13, 2018 10:10 pm

G'day ! Thanks for the reply, it seems I have good vacuum as the brake booster works fine ( the booster uses vacuum. Taking the van to the local mechanic tommorow to put some testing equipment on it and see what's going on. Cheers

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