 | Home > Puma (Tdci) > Handbrake - a daft question. |
 
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17339   
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If your brake fluid is "about half", top it up without delay. On the Puma it generally needs to be virtually up to the bottom of the reservoir's filler neck to prevent the warning light flickering if you brake while going down hill.
There is no connection whatsoever between the handbrake (transmission brake) and the hydraulic wheelbrake, apart from the fact that they share a warning light on the instrument binnacle. The transmission brake is 100% mechanical and is operated by a cable from the handbrake lever. It is entirely normal for there to be some movement of the vehicle if, say, you brake to a halt with the footbrake, apply the transmission brake, and then release the footbrake. The reason for this is that the transmission brake, which is mounted on the back of the transfer box, is connected to the rear wheels via the rear propshaft, rear diff, halfshafts, and drive flanges, and to the front wheels via the centre diff, front propshaft, front diff, halfshafts, CV joints, stub shafts, and drive flanges. All of these components have a little bit of slop or play, and cumulatively this amounts to quite a lot of movement. If you are ever in a situation where it is imperative that the vehicle does not move as you transition to the handbrake, take up the slop in the transmission first. For example, if you are parking just uphill from your neighour's Bugatti and need to be very close to it but not touching, stop the vehicle with the footbrake, and then hold the vehicle on the clutch/transmission as you apply the handbrake. this takes up the slack, and the vehicle then wont roll back. It is actually easier to do than to describe. |
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7th Jul 2023 9:19am |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4410
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You are quite correct low fluid will not affect your hand brake, which is actually a transmission brake that acts upon the rear propshaft, rather than the rear brake drums/discs on a conventional car.
Adjustment instructions here - https://www.defender2.net/forum/post367376.html |
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7th Jul 2023 9:21am |
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| Dinnu Member Since: 24 Dec 2019 Location: Lija Posts: 3409  
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If the brake fluid is half full and there are no leaks, then most likely your brake pads are quite worn. If you fill it up, then just remember that you will need to suction up some of the brake fluid before pushing the brake caliper pistons in when replacing for new brake pads. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black |
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7th Jul 2023 10:34am |
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| andy63 Member Since: 30 Jun 2023 Location: north east Posts: 511
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point worth making I think.. its best practice when returning pistons on a hydraulic system , to clamp the flexible hose and open the bleed..expell the fluid that way rather than push it back into the system...especially if there are abs modules in the system...prevents the risk of bits reaching it and causing problems..
that would be my method anyway  |
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7th Jul 2023 4:12pm |
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| the_lincs_landies Member Since: 29 May 2023 Location: Boston, Lincs Posts: 230
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Thanks all, that’s a job to look at next week then for the brake fluid. I’m hoping ts not that the pads are worn as it was MOT’d in April and no mention on brake, and has only a few hundred miles since.
With the handbrake, the lever seems to go to about the right place so I guess the “slop” in the movement is normal. |
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7th Jul 2023 9:55pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17339
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The slop is in the transmission, not the handbrake mechanism.
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7th Jul 2023 10:12pm |
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| the_lincs_landies Member Since: 29 May 2023 Location: Boston, Lincs Posts: 230
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Cheers blackwolf. Assuming either way it’s a “non-job” though?
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7th Jul 2023 10:46pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17339
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Indeed. It is something you get used to and live with, not usually a problem. I suppose the skill and experience comes when you need judge when the driveline slop becomes excessive, but generally then you'll be aware of it in normal driving.
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8th Jul 2023 7:51am |
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