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Brake woes


 
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rnhobbs



Joined: 22 Sep 2016
Posts: 3
Location: Leicestershire

PostPosted: Thu Sep 22, 2016 19:32    Post subject: Brake woes Reply with quote

Hello all, I'm new to Delica ownership (1994, LWB, 2.8) - 3 weeks now and I can't even use it - please help!  Sad

When I picked it up the brakes felt like they needed a bleed - lots of travel, pedal spongy and also creeping towards the floor.

Bled the system - no improvement.
Changed the master cylinder and bled again - no improvement.
Changed all the pads (they were very low) - no improvement (disks are fine, no lip).
Changed the front calipers and bled again (one was weeping slightly) - no improvement.
Checked all flexi pipes and bled again - no improvement.
Freed and lubed all sliding bolts with silicone grease - no improvement.

Still the same symptoms - lots of travel before anything happens, pedal spongy and also creeping towards the floor.

I'm getting a bit frustrated now and running out of ideas. Am I missing something obvious? Cheers, Richard.
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PostPosted: Thu Sep 22, 2016 19:32    Post subject: Google Ads keep this community free to join!


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buzr6mille
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Joined: 11 Jul 2009
Posts: 6880
Location: Wherever i park up.

PostPosted: Thu Sep 22, 2016 20:30    Post subject: Reply with quote

Hi and Welcome, sounds obvious, but have you made sure the pistons on the rear are free and move easy.
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andyman



Joined: 08 Dec 2012
Posts: 5601
Location: Penrith

PostPosted: Thu Sep 22, 2016 20:46    Post subject: Reply with quote

Probably won't affect sponginess, but have you checked the adjustment on the servo actuating rod from the brake pedal?
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davep10000



Joined: 17 Sep 2009
Posts: 210
Location: Dumfries, SW Scotland

PostPosted: Thu Sep 22, 2016 21:41    Post subject: Reply with quote

I know you say you have checked the flexis - but is this with the brake hard down, as they can sometimes expand if old or delaminated inside.
One other way to eliminate each wheel is to clamp off each flexi in turn to see if there is any change.
Good luck.
PS some sinking of the pedal is normal without the engine running.
Dave.
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Lewis
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Joined: 25 May 2006
Posts: 16290
Location: Huddersfield

PostPosted: Fri Sep 23, 2016 0:06    Post subject: Reply with quote

Probably a daft question but what order did you bleed the brakes in.

They need to be done:-  n/s rear - o/s front - o/s rear - n/s front.
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andyman



Joined: 08 Dec 2012
Posts: 5601
Location: Penrith

PostPosted: Fri Sep 23, 2016 0:23    Post subject: Reply with quote

I wonder if it is the same order for the L300? It might explain why my brakes are still spongy after several attempts to bleed them in the usual order, ie front o/s first, finishing with rear n/s.
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Lewis
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PostPosted: Fri Sep 23, 2016 0:53    Post subject: Reply with quote

Instead of wondering why not read the brake section on the Mitsubishi L300 workshop manual, that Pink Lig has uploaded here:-

http://www.MDOCUK.co.uk/forums/viewtopic.php?t=45972
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rnhobbs



Joined: 22 Sep 2016
Posts: 3
Location: Leicestershire

PostPosted: Fri Sep 23, 2016 6:30    Post subject: Reply with quote

Thanks guys, I'll work my way through your suggestions over the weekend. It's a L400.

Flexis were checked by a mechanic underneath holding them whilst I pressed the brake. Rear pistons are free and calipers slide okay. Bleeding was in the 'furthest from MC' way first, I'll try the suggested method.

Further investigation concludes that Milners have sent me a master cylinder for a manual version rather than an auto (despie auto being ordered). I shall be phoning them later today with my current frustrations slightly tempered.

Could that make such a big difference?

Richard.
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Lewis
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Joined: 25 May 2006
Posts: 16290
Location: Huddersfield

PostPosted: Fri Sep 23, 2016 8:22    Post subject: Reply with quote

Forgot to mention that you should bleed the brakes with the engine running.  Embarassed

As for the master cylinder,; there were different designs for different models. These have been refined over the years to two.

Current part numbers are:-

MR307358 for the HSEGF and HSEHF body - originally code MR129147 or MB928088

And

MR307359 for the HSNGN body; originally MR129148 or MR129144

Yiu will find uour original part number stamped on the master cylinder.

HTH
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Deker



Joined: 08 Mar 2008
Posts: 3834
Location: Borehamwood

PostPosted: Fri Sep 23, 2016 21:08    Post subject: Reply with quote

Lewis wrote:
Probably a daft question but what order did you bleed the brakes in.

They need to be done:-  n/s rear - o/s front - o/s rear - n/s front.

When I had all my calipers off last year, for full clean, pistons N seals out etc.

I bled each pair = front or back, as I did them - No particular order = No problems.

But then - I have years of experience with brake work, bikes cars, LGVs and HGVs, tho they work with air.  Rolling Eyes

But the pedal sinking bit, usually shows a M/C fault.

Deker
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rnhobbs



Joined: 22 Sep 2016
Posts: 3
Location: Leicestershire

PostPosted: Sat Sep 24, 2016 19:04    Post subject: Reply with quote

Thanks for all your help guys.

After recently selling my Mercedes V220cdi, this forum was the reason that I bought a Delica instead of an Elgrand (is that a swear word on here?). Plus the parts availability too.

After all the work, the brakes just needed using and bedding in. After trying the brakes on my drive to ensure they worked, and after driving a further 30 miles today, the pedal feels totally different. Who'd have thought!

Thanks again,

Richard.
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Deker



Joined: 08 Mar 2008
Posts: 3834
Location: Borehamwood

PostPosted: Mon Sep 26, 2016 18:29    Post subject: Reply with quote

rnhobbs wrote:
Thanks for all your help guys.

A) the reason that I bought a Delica instead of an Elgrand (is that a swear word on here?).

B) After trying the brakes on my drive to ensure they worked, and after driving a further 30 miles today,
the pedal feels totally different. Who'd have thought!

Thanks again,

Richard.

A) No.

B) Excellent  Smile

Deker
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