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NFIN02

Member Since: 17 Feb 2022
Location: Londonderry
Posts: 96

1989 Defender 90 300 Tdi HT Chawton White

300tdi brakes issue

Hi all, hope you can help. Got a 89 300tdi def 90. Jumped into it last night to take it for a spin cuz it spends of us life parked in garage and noticed my brake pedal was very hard and almost no brakes at all. Any thoughts of what this could be guys? Thanks

25th Aug 2022 4:53am

landy andy

Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5666

2006 Defender 110 Td5 USW Zermatt Silver

Check your brake servo is working and is being provided with a vacuum.

Before starting engine pump brake pedal, and each pump it should get higher, then whilst holding pedal down, start engine a pedal should fall.

Also once after engine has stopped try pulling the supply pipe out of the servo, and it should hiss, as it should be holding a vacuum.

Last edited by landy andy on 25th Aug 2022 8:02am. Edited 1 time in total

25th Aug 2022 5:01am

I Like Old Skool

Member Since: 23 Feb 2015
Location: Manchester
Posts: 808

1994 Defender 110 300 Tdi ST Coniston Green

landy andy wrote:
Check your brake servo is working and is being provided with a vacuum.

Before starting engine pump brake pedal, and each pump it should get lower, then whilst holding pedal down, start engine a pedal should raise.

Also once after engine has stopped try pulling the supply pipe out of the servo, and it should hiss, as it should be holding a vacuum.

A bit back-to-front there @landy andy

Pumping the pedal with the engine off should get the pedal harder/higher. If you then hold the pedal down and start the engine the servo assistance should pull the pedal down a bit.

25th Aug 2022 7:42am

landy andy

Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5666

Woops. Yep bit too early in the morning

Will edit it to correct.

25th Aug 2022 8:02am

Scotm

Member Since: 28 Feb 2014
Location: Aberdeenshire
Posts: 666

2012 Defender 110 Puma 2.2 SW Orkney Grey

Corrosion round the back of the servo affecting vacuum is quite common on older vehicles

25th Aug 2022 11:09am

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