The diff lock saga....The end

D

Dom J

Guest

• Sep 7, 2006

• #1

After much soaking of seized bit in diesel, penetrating oil etc and
getting no where i was ready to live without it. Until some kind soul
nicked the radio aerial off my works van. Off i went to the scrap yard
to see if i could find another one (Halfrauds wanted £13!). None to
be had at all, but hello whats that familier looking shape sat over the
back....a Range Rover....oohh.....an auto one even better. Diff lock
lever works ok on this one. Took it off and took a chance it would fit
my Disco. Cost me the grand total of £5. A quick clean up and
regrease and it was off with the old seized one. New one bolts
straight on and hey presto it works, well the diff lock light comes on
and the lever moves well over to the left. How can i check that it is
really engaging the diff lock?.

Dom J
(Happy as i was fed up of smelling of diesel)

 

D

Dougal

Guest

• Sep 7, 2006

• #2

Dom J wrote:

> How can i check that it is really engaging the diff lock?.
>
> Dom J

Engage diff lock and observe warning light. Warning light must be on -
if warning light is off, lock has not engaged but system is not
necessarily non functional. Rock backwards/forwards until both
conditions are met.

You've been there before so know that it is possible in your case.

Jack up any one wheel with park brake off (take appropriate
precautions if required!), main and transfer 'boxes NOT in neutral and
attempt to rotate the raised wheel. If it rotates, lock is not
functioning.

 

D

Dougal

Guest

• Sep 7, 2006

• #3

Dougal wrote:

> Dom J wrote:
>
>> How can i check that it is really engaging the diff lock?.
>>
>> Dom J
>
> Engage diff lock and observe warning light. Warning light must be on -
> if warning light is off, lock has not engaged but system is not
> necessarily non functional. Rock backwards/forwards until both
> conditions are met.
>
> You've been there before so know that it is possible in your case.
>
> Jack up any one wheel with park brake off (take appropriate precautions
> if required!), main and transfer 'boxes NOT in neutral and attempt to
> rotate the raised wheel. If it rotates, lock is not functioning.

If you jack up a front wheel, you can leave the park brake applied.

 

R

Richard Brookman

Guest

• Sep 7, 2006

• #4

Dom J wrote:

| How can i
| check that it is really engaging the diff lock?.
|

Get onto some gravel, full lock, drive slowly. You'll hear it scrubbing if
the difflock is working.

--
Rich
==============================

Take out the obvious to email me.

 

S

Srtgray

Guest

• Sep 7, 2006

• #5

Dom J wrote:
> After much soaking of seized bit in diesel, penetrating oil etc and
> getting no where i was ready to live without it. Until some kind soul
> nicked the radio aerial off my works van. Off i went to the scrap yard
> to see if i could find another one (Halfrauds wanted £13!). None to
> be had at all, but hello whats that familier looking shape sat over the
> back....a Range Rover....oohh.....an auto one even better. Diff lock
> lever works ok on this one. Took it off and took a chance it would fit
> my Disco. Cost me the grand total of £5. A quick clean up and
> regrease and it was off with the old seized one. New one bolts
> straight on and hey presto it works, well the diff lock light comes on
> and the lever moves well over to the left. How can i check that it is
> really engaging the diff lock?.
>
> Dom J
> (Happy as i was fed up of smelling of diesel)
>

engage diff lock, jack up one wheel, turn it - if the whole car tries to
move, the diff is locked!

Stuart

 

D

Dougal

Guest

• Sep 7, 2006

• #6

Srtgray wrote:

> engage diff lock, jack up one wheel, turn it - if the whole car tries to
> move, the diff is locked!
>
> Stuart

An inadequate test - insufficient conditions specified.

 

D

Dave Liquorice

Guest

• Sep 7, 2006

• #7

On Thu, 07 Sep 2006 20:00:56 +0100, Dougal wrote:

>> Jack up any one wheel with park brake off (take appropriate
>> precautions if required!), main and transfer 'boxes NOT in neutral and
>> attempt to rotate the raised wheel. If it rotates, lock is not
>> functioning.
>
> If you jack up a front wheel, you can leave the park brake applied.

Eh? The "park brake" doesn't opearate at the wheels on an Land Rover.

--
Cheers [email protected]
Dave. pam is missing e-mail

 

I

Ian Rawlings

Guest

• Sep 7, 2006

• #8

On 2006-09-07, Dave Liquorice <[email protected]> wrote:

> Eh? The "park brake" doesn't opearate at the wheels on an Land Rover.

If the handbrake is on the rear of the transfer box, then if he jacks
up a rear wheel then he'd have to let the handbrake off in order for
the twisting of the raised wheel to get to the transfer box, otherwise
the handbrake would stop the wheel twisting, diff lock or not.

--
Blast off and strike the evil Bydo empire!

 

D

Dougal

Guest

• Sep 7, 2006

• #9

Dave Liquorice wrote:

> On Thu, 07 Sep 2006 20:00:56 +0100, Dougal wrote:
>
>
>>>Jack up any one wheel with park brake off (take appropriate
>>>precautions if required!), main and transfer 'boxes NOT in neutral and
>>>attempt to rotate the raised wheel. If it rotates, lock is not
>>>functioning.
>>
>>If you jack up a front wheel, you can leave the park brake applied.
>
>
> Eh? The "park brake" doesn't operate at the wheels on an Land Rover.

Correct.

We're trying to verify the effectiveness of the centre diff lock. The
diff has three inputs/outputs - when the diff is locked, preventing
rotation at any two of the three will prevent rotation at the third.

The input is locked against engine compression if the main and
transfer 'boxes are not in neutral. The driveline park brake locks the
rear output. If the centre diff is locked the front output will be
locked confirmed by being unable to rotate a raised front wheel.

 

O

Oily

Guest

• Sep 7, 2006

• #10

"Dougal" <DougalAThiskennel.free-online.co.uk> wrote :-

>
> If you jack up a front wheel, you can leave the park brake applied.

With the park brake applied and one front wheel jacked up and you can
turn the wheel, then centre difflock is disengaged (assuming you have no
transmission problems), similarly if you can't turn it then difflock is
engaged.

No one actually said that as far as I can see, except Dougal (but not all
at the same time) the point being (as he also said) to verify the
effectiveness of the centre diff.

Martin

 

D

Dougal

Guest

• Sep 7, 2006

• #11

Dougal wrote:

> Dave Liquorice wrote:
>
>> On Thu, 07 Sep 2006 20:00:56 +0100, Dougal wrote:
>>
>>
>>>> Jack up any one wheel with park brake off (take appropriate
>>>> precautions if required!), main and transfer 'boxes NOT in neutral
>>>> and attempt to rotate the raised wheel. If it rotates, lock is not
>>>> functioning.
>>>
>>>
>>> If you jack up a front wheel, you can leave the park brake applied.
>>
>>
>>
>> Eh? The "park brake" doesn't operate at the wheels on an Land Rover.
>
>
> Correct.
>
> We're trying to verify the effectiveness of the centre diff lock. The
> diff has three inputs/outputs - when the diff is locked, preventing
> rotation at any two of the three will prevent rotation at the third.
>
> The input is locked against engine compression if the main and transfer
> 'boxes are not in neutral. The driveline park brake locks the rear
> output. If the centre diff is locked the front output will be locked
> confirmed by being unable to rotate a raised front wheel.

Who's spotted my 'deliberate' error? I'm too tired to explain tonight.