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<!-- google_ad_section_start -->Rear Drum strip and clean......<!-- google_ad_section_end -->
Rear Drum strip and clean......
Simple job with the right tools
Published by Andy Monty
25-04-2010
Difficulty Level: 1

User Rated:
Difficulty Level: 2

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Rear Drum strip and clean......

Working on your car brakes need's a lot of care if you are not 100% confident you can get the job right seek the help of a mechanic....


kit needed in addition to chocks and jack and stands.....
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brake cleaner,
coper grease
hammer
BIG flat screw driver/ pry bar
pliers
wheel brace/ torque wrench (steel rims 105nm)
smaller slotted screwdriver
T30 torx driver (i used impact driver as mine were seized)
some rag

M10 x 3" or so bolts and spanner to suit...




First Chock the other wheels leave the car in gear but release handbrake fully and slacken wheel nuts...

raise the car safely and axle stand the side you are working on and remove wheel

now you are faced with the Drum/hub...

get your 30T Torx driver and remove the 2x torx screws.....
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now with them both removed you need to pry the drum off evenly (a tap with a hammer round the edge can help)

AT this point you can go one of 2 ways..... my prefered method is to use 2 bolts in the threaded holes of the drum and wind the drum off occasionally tapping the drum to free the shoes off so the drum slips past them...




work the bolts alternately to keep the drum square to the hub stub watch for the wheel bearing rotating as you do this.. if you have this problem slide a screw driver into one of the wheel bolt holes to stop it rotating...

Or pry off using large flat screwdriver/ claw hammer slowly and evenly all the way round......
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now you have the drum off (the hard part)

make a mental note of the internals

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now remove the lower spring with pliers/ small flat screw driver
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make a note of how the self adjuster is sat in the shoes

Then remove upper spring....
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screw the end of the auto self adjuster clockwise several turns
(more on this later)

the pic below shows the left fork 180 degrees out of the seated position...

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now remove 2x pad retainer clips

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take care not to loose the pins from the back of the drum
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pull shoes off pin

note Handbrake connections/linkages...
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Now clean all surfaces with brake cleaner and rag....


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now use copper grease on contact points...

Refit shoes ensuring they sit in the lower retainer and uppers sit against the Slave cylinder shafts...
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next re fit the auto adjuster and the lower spring.......


at this point push the uppers together so the shoes push the self adjuster tight and try to fit drum back on

if its a tight fit remove adjuster and wind in. if very slack wind adjuster out so shoes just catch drum when re fitting....

now re fit upper spring...

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then drum and torx screws

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now to re adjust the shoes

climb into car carefully so as not to upset it on the jack

pump brakes slowly and listen for the clicks of the auto adjuster might take 50 or so pumps once it stops clicking it should be fully adjusted.....

then check handbrake operation and foot brake with a friend spinning hub


re fit wheel and torque up wheel nuts
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Old 25-05-2014   #1
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Re: Rear Drum strip and clean......

I know this is an old thread but thanks for this - just done mine and adjusted the handbrake too. Simple when you know how!
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Old 18-12-2018   #2
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Re: Rear Drum strip and clean......

Anyone know the thread size, thread pitch and thread length of the countersunk head T30 drum retaining screws, please? Intend to buy A2 stainless replacements on ebay for mine which have siezed rather than pay stealer prices for plain steel which will rust and sieze up again.
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Old 18-12-2018   #3
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Quote Originally Posted by GaryBaldy View Post
Anyone know the thread size, thread pitch and thread length of the countersunk head T30 drum retaining screws, please? Intend to buy A2 stainless replacements on ebay for mine which have siezed rather than pay stealer prices for plain steel which will rust and sieze up again.
Not done mine yet..

I am let do believe the 'jacking threads in the drum are M8..

Logic dictates the securing screws will be M6.. length.. not sure
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Old 18-12-2018   #4
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Thumbs up Re: Rear Drum strip and clean......

Normal/standard/basic pitch M6, about 14-15 mm long.
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Drum holes are M10 (also "normal pitch" = that means you don't care what the number is, just get "M10" bolt).
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How self-adjuster works:
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Last edited by GrandePunto PL; 18-12-2018 at 15:00. Reason: YouTube video.
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Old 18-12-2018   #5
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Re: Rear Drum strip and clean......

So the M8 bolts I Sourced for this job are of no use..

Typical... not had many simple jobs on this old mj.
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Old 18-12-2018   #6
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Re: Rear Drum strip and clean......

Many thanks for your help. As can be seen from reply by "Grande Punto" the retaining screws are M6 about 14 - 15mm long. I assume pitch will be 1mm. I will probably buy M6 X 16mm and grind down to suit if there is interference inside of drum which can be readily ascertained. Best Rgds., GaryBaldy
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Old 18-12-2018   #7
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Re: Rear Drum strip and clean......

Many thanks for your help. I assume pitch will be 1mm. I will probably buy M6 X 16mm and grind down to suit if there is interference inside of drum which can be readily ascertained. The demonstration in the shoe adjustment video is also enlightening. I can see that the mechanism is fragile and overly complicated and in true Fiat fashion will be prone to rust and siezing. Best Rgds., GaryBaldy
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Old 04-01-2019   #8
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Re: Rear Drum strip and clean......

Hope this is of some help to others. Bought 10 off stainless A2 socket cap screws M6 X 16mm with 4mm allen key socket from gwr-fasteners on ebay item # 282818754255 price 1.35 delivered UK. Checked that there was no interference due to thread length and there was no need to grind down.Looking for surplus new shoes in Stockport area for 228mm drums X 42mm shoe width. Mintex 564 or equivalent. For some reason one nsr shoe lining has worn down to 2mm at bottom position prematurely at 50K - possibly lazy piston (not detected in MOT brake test) or sticking shoe on backplate. Problem will be diagnosed and remedied as soon as new shoes have been sourced. Best price on shoes so far for Mintex 16.15 delivered. Thanks again for all the properly detailed help which makes life so much easier.
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Old 04-01-2019   #9
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Quote Originally Posted by varesecrazy View Post
So the M8 bolts I Sourced for this job are of no use..

Typical... not had many simple jobs on this old mj.

M10 bolts worked well

Thankfully components seem fine for another 6 months.
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Old 07-03-2019   #10
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Re: Rear Drum strip and clean......

Can't you just release the adjuster from the holes with as flat screwdriver?
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Old 08-03-2019   #11
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Post Re: Rear Drum strip and clean......

There is no simple "release" (you must "rewind" it back). If you try poking it with screwdriver, you're risking damage (leaf spring is fragile). It can be done, but it's risky (not advisable to complete beginners)

For example, Punto 1 had very different style self-adjusters (and there was an easy way to release them, through wheel bolt hole in the drum, poke it in the right spot and that's it - but not here in Grande).
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Last edited by GrandePunto PL; 08-03-2019 at 08:00. Reason: Self-adjuster "releasing" warning.
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