Jump to content

DAF T244 Centre Diff Lock

Guest

By Guest
in British Vehicles

 Share

Recommended Posts

Wendelspanswick

Wendelspanswick

Posted
Posted

It doesn't sound like it applies to you but if you drive with a locked diff on hard surfaces the discrepancies between the front and rear axle wheel circumferences induce a torsion effect in the running gear so everything gets wound tight. Sometimes you need to drive on a loose surface to release some of the torsion so the diff lock can release.

I have a muddy track that I regularly drive along and a slightly drier but fairly steep stoney track I drive up and I'd struggle without diff lock.

It's the same buzzer for the diff lock that sounds until the air pressure is up to working pressure.

 

Wendelspanswick

Wendelspanswick

Posted
Posted

There are 4 square plastic blanking plugs on the dash, if you prize those out there are 4 1/4 turn screws underneath that release to allow you to lift the dash.  I'd get the buzzer working as it should be an easy fix and that should enable you to work out whether the diff is locked or not.

I can get under my DAF and measure the actuator rod length in both positions if that helps?

john1950

john1950

Posted
Posted

Easy test. jack one front wheel of the ground then try to rotate. If it is in 4wd it will only turn part way and will try to turn rear propshaft, If it is in 2wd it should rotate.

Wendelspanswick

Wendelspanswick

Posted
Posted
43 minutes ago, john1950 said:

Easy test. jack one front wheel of the ground then try to rotate. If it is in 4wd it will only turn part way and will try to turn rear propshaft, If it is in 2wd it should rotate.

Will that work as it's permanent 4wd? The button locks the centre diff.

john1950

john1950

Posted
Posted

It will give you an indication. A third diff proportions the drive between front and rear axles, to design specification. When the third diff is locked it gives both axles the same power. When it is unlocked front and rear axles are not positively connected so should give propshaft rotation. It may just be a small of propshaft rotation by rockingthe tyre.  Does not cost anything to test. Axle stand or blocks for safety.

  • Like 1
johnwardle

johnwardle

Posted
Posted (edited)
8 minutes ago, john1950 said:

That was why I said Front, It would still be standing safely with the parking brake on.

The parking brake on a Leyland Daf T244, being air operated, works on all 4 wheels, much to the amusement of my MoT tester, yes he did try it!

Edited by johnwardle
Extra text added
john1950

john1950

Posted
Posted (edited)

I have learnt something new , every day is a day at school. That still means the vehicle was standing on a jack with the parking brake off. Stay safe, and be there at the end of the day with your knew found knowledge. As I have gone through working life I have known Two people killed in incidents with bottle jacks, Both experienced Mechanics. My father was trapped under a car once when a friend came into his garage and was talking to him while he was working under a car. He was leaning on the trolly jack handle and let the car down unintentionally he then ran in a panic looking for help because he did not know how to jack it up again. He always had a block or something under anything he jacked up after that. Sorry to deviate from difflocks most complicated ones I have worked on were Terbergs 8x8s Usual way to unwind, a short reverse usually one wheel revolution will suffice. Tyre pressures and tyre circumference are critical on multidrive vehicles.

Edited by john1950
addition

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
 Share
Go to topic listing
×
×
  • Create New...