Re: My li'l Red Mahindra Thar with some practical modifications Quote:
Originally Posted by samwagon Want to share an experience I had yesterday. One of my coursemates who literally breathes jeeps drove the Thar (my Thar) for a short distance and concluded that an adjustment of the brake shoes cam was in order because excessive shoe movement was causing the pedal to sink in further than normal. I personally hadn't noticed since the change would have been gradual. Well, we looked for a adjustment cam bolt as in the usual place of a 550 and it wasn't there. So opened up the drum and realised that the brake mechanism is self setting by means of a ratchet arrangement.
For the left side drum brake, the ratchet was observed to have slipped to beyond zero position thus preventing auto adjustment and causing the relatively poor braking. The point to note is that this mechanism had slipped by itself without me or anyone else having fiddled with it. Seems an inherent design problem. My advice to all users who aren't too happy with their brakes would be to give it a once over.
BTW, once everything was set in order, the braking improvement was significant. I wonder why I hadn't noticed the difference earlier. The large movement of left rear shoes must also be affecting the right discs since brake lines are cross connected.
Also, one tip which I realised later, there's a rubber grommet at the back of the brake plate which provides access to reset the self adjusting ratchet to enable smooth drum removal.
Dhabhar sir, any comments would be welcome. | Dear Samwagon - of course, I am delighted to comment, which goes as follows: "You are the correct candidate to join the industry, because without analyzing and without any sort of data, you have already used the cardinal words "inherent design problem"! Oh God, save me, why must I endure this torture every day?" (chill dude, I'm just kidding, OK? )!
On a serious note, please be very careful when dealing with auto adjusters, they can give you sleepless nights, I have learnt this the hard way! Remove them, thoroughly clean them and then measure the exact incremental movement (to the second decimal place) of the shaft per notch engaged. You will be surprised at the results. The liner gaps for primary and secondary liners are never equal, which many people tend to ignore. Best of luck!
As they say in engineering drawings, "if in doubt, ask"! .
Best regards,
Behram Dhabhar
Last edited by DHABHAR.BEHRAM : 2nd January 2014 at 22:17.
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