Rear diff lock problem

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redfacep
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I need some advice.
300GES 1992.
My rear diff lock doesn't seem to work. All was well until I decided to renew the fluid. The front one is fine. Any ideas most welcome.

Thanks

Philip

mervyn weaver
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Re: Rear diff lock problem

obvious question, have you bled it out properley?

redfacep
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Re: Rear diff lock problem

Thanks for your reply.
I have used an easibleed to change the fluid. There were no bubbles in the fluid coming out of the bleed nipples. I let it run through for maybe 1 pint.

Any other ideas?

Thanks.

Philip

mervyn weaver
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Re: Rear diff lock problem

what method did you use to check the diff lock function?

redfacep
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Re: Rear diff lock problem

Just the indicator light by the switch.
As I say was working perfectly before fluid change.

mervyn weaver
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Re: Rear diff lock problem

try jacking up 1 rear wheel, engage diff lock, then turn raised wheel by hand. make sure car is securley chocked, engine off & out of gear with park brake off. this will determine if the lock is or isnot working & also check the function of the light as long as the ignition is turned on.

redfacep
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Re: Rear diff lock problem

Thanks for your reply.

I'll try that but how does the diff lock work. How is the hydraulic pressure achieved to activate the diff lock cylinder?

mervyn weaver
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Re: Rear diff lock problem

do you have levers to pull to engage diff locks or buttons to press?

redfacep
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Re: Rear diff lock problem

It has 3 buttons on the centre dash.

mervyn weaver
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Re: Rear diff lock problem

Ahh! give me a bell, 01684592656 office hours.