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Old 7th June 2010, 13:36   #241
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Nice buses and dog is cute too
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Old 7th June 2010, 13:44   #242
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Originally Posted by raj_5004 View Post
Pics below to show the difference in height. Please ignore the watch dog!
Raj,

That is really some difference, any explanation other than the QA issue of the Wheels Air Suspension?

Tell me one thing. Normal suspension buses are still available right? (The KSRTC types)

Why Ignore the watch dog!

That is really an alert one there and cute one too! Look at the difference in the "eye" he is giving in both the photos.

The first one it the "who goes there" look and in the second one "Oh its you only " kind of look.

Good guard to have around!

Best Regards & Drive/Ride Safe

Ram
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Old 7th June 2010, 13:49   #243
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Originally Posted by amitk26 View Post
Nice buses and dog is cute too
thanks buddy.

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Originally Posted by r_nairtvm View Post
Raj,

That is really some difference, any explanation other than the QA issue of the Wheels Air Suspension?

Tell me one thing. Normal suspension buses are still available right? (The KSRTC types)
as usual, no explanations! but this time, we wish to get this sorted once & for all.

yes, normal buses are available. infact air suspension is an optional dealer fitment.

Quote:
Why Ignore the watch dog! That is really an alert one there and cute one too! Look at the difference in the "eye" he is giving in both the photos.

The first one it the "who goes there" look and in the second one "Oh its you only " kind of look.

Good guard to have around!

Best Regards & Drive/Ride Safe

Ram
hey, i dint mean it that way! infact, i love him! by ignore i mean, the pic is of the buses & i wanted to click a pic without him but he refused to move out of the frame! LOL...

Last edited by raj_5004 : 7th June 2010 at 13:50.
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Old 7th June 2010, 22:31   #244
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Originally Posted by raj_5004 View Post
his is not we expect of a reputed product (wheels india) which we got fitted from the A.S.S (TVS)!
I believe Wheels India and Brakes India are TVS group companies too. After market modification is always a tricky issue. It will work 99.99% of the times, but there is always a small chance some thing could go wrong, (Lack of expertise of the technitian peforming the work, Not gone thru the integration testing of the said combination, etc)
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Old 8th June 2010, 08:46   #245
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Which bus is the one with suspension problems? Is it the one on the right or the one on the left?
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Old 8th June 2010, 08:57   #246
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Originally Posted by teamveevee View Post
I believe Wheels India and Brakes India are TVS group companies too. After market modification is always a tricky issue. It will work 99.99% of the times, but there is always a small chance some thing could go wrong, (Lack of expertise of the technitian peforming the work, Not gone thru the integration testing of the said combination, etc)
thats true. but we pay extra money & get such work done at an authorised dealer to avoid such problems & still we have to face such issues.

we are new in this field & we clearly dont want such issues to malign our reputation.

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Which bus is the one with suspension problems? Is it the one on the right or the one on the left?
the one on the right had the problem. it was rectified at the A.S.S, now i think the left bus is also leaking air!
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Old 8th June 2010, 15:01   #247
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Hey guys, one more query-

One of our drivers in kerela told me that the GC of our buses are very low. It will easily scratch/break its front bumper in hilly areas while negotiating sharp turns. i would like to add that our buses run on 9J tyres (which came standard) compared to 10J tyres as is normally found on other buses (fitted aftermarket), which means our bus' GC is a little less than the other buses with 10J tyres.

So thereby that driver has advised us to increase the GC by adding additional plates to the front leaf spring. is that normal? he insists this is done on every bus in kerela. wont it affect the stability/dynamics of the vehicle? will it have any adverse effects? is this necessary?
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Old 8th June 2010, 20:51   #248
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The standard tyres are 9.00x20 and the lorry chassis tyres are 10.00x20. Please note that 20 is the height and 9.00 and 10.00 is actually the width. Hence upgrading to 10.00 won't increase the ground clearance.

Adding plates a common practice though is not recommended. It is for heavy duty application. Lets say each plate has a capacity of 1000 kgs, and there are 5 plates, so its 5000 kgs; increasing the plates to 3 will increase the weight carrying capacity to 8000 kgs.

For your purpose you do not need more plates since a gross vehicle weight of 16,000 is more than enough. Besides, increasing the plates, which are quarter of an inch thick will not increase ground clearance. Rally cars use spacers in the suspension to increase height of the body, you could try that.

The main problem with a Super-Delux bus body is that the front bumper is low to aid climbing for children, saree clad women and old people. That's why the ground clearance comes down. Besides that a tourist body has 60% rear overhang, that is also a problem. Net net, the problem is inherent and cannot be solved, the Driver has to be careful while negotiating steep inclines or declines. 99% of the time you would have no problem, the worst case scenario is cracking the fibre bumper, which can be fixed or replaced.

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Originally Posted by raj_5004 View Post
Hey guys, one more query-

One of our drivers in kerela told me that the GC of our buses are very low. It will easily scratch/break its front bumper in hilly areas while negotiating sharp turns. i would like to add that our buses run on 9J tyres (which came standard) compared to 10J tyres as is normally found on other buses (fitted aftermarket), which means our bus' GC is a little less than the other buses with 10J tyres.

So thereby that driver has advised us to increase the GC by adding additional plates to the front leaf spring. is that normal? he insists this is done on every bus in kerela. wont it affect the stability/dynamics of the vehicle? will it have any adverse effects? is this necessary?
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Old 19th June 2010, 19:58   #249
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Originally Posted by raj_5004 View Post
So thereby that driver has advised us to increase the GC by adding additional plates to the front leaf spring. is that normal? he insists this is done on every bus in kerela. wont it affect the stability/dynamics of the vehicle? will it have any adverse effects? is this necessary?
I remember asking you this.

Adding extra leaves is normal, infact essential. This is also usually accompanied by re-cambering the leaves. Depending to the requirements, they will add 3-4 leaves each, per set. I hope they do not mean the square plates between the front axle and leaf. This is done at specialised leaf workshops. Re cambering requires skill and brawn power.

Since this process adds 6-9 inches to front GC, make sure that the steps are within the legally permissible limits for height from the road after this process.

Remember to get bus speed tested after doing this, since some vehicles are prone to develop steering shake (വെട്ടല്* - vettal / vetti theyal) as some drivers call it. This cal lead to wavy wear of the front tyres. The front end will feel like a boat in stormy waters when this happens.

Take the bus to a good road and drive for 2-3 kms as fast as possible.

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Originally Posted by TheARUN View Post
The standard tyres are 9.00x20 and the lorry chassis tyres are 10.00x20. Please note that 20 is the height and 9.00 and 10.00 is actually the width. Hence upgrading to 10.00 won't increase the ground clearance..
I am afraid I cannot recall the tyre sizes we used; but we always used to buy tyres with the highest ply rating available. IIRC, tyres were available with a ply rating (PR) between 16 and 21. PR is the number of layers of fabric in tyre's skeleton. This gives better tyre life. Ride quality? Can you really measure it on a heavy veicle in Kerala roads?
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Old 19th June 2010, 21:00   #250
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three extra leaves have been added to the front suspension & this has increased the GC & the drivers are satisfied. this was done at a specialized workshop who has been doing this job for ages. however, one bus had a slight tilt to the left. so, in that bus, four leaves have been added to one side & three leaves have been added to the other side to compensate for the tilt. is that also normal??

frankly, i feel some of the procedures/requirements of these heavy vehicles quite strange, scary & sometimes amusing!

Last edited by raj_5004 : 19th June 2010 at 21:01.
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Old 19th June 2010, 21:37   #251
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bus had a slight tilt to the left. so, in that bus, four leaves have been added to one side & three leaves have been added to the other side to compensate for the tilt. is that also normal??
No; this is not normal.


You need to identify and fix the reason for this excessive tilt.

Is the leaf count same on both sides? Have the leaves been properly cambered? ("adichu" - beat) is the word they will use. Was the air suspension issue fixed before before dealing with this?
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Old 19th June 2010, 22:46   #252
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Raj, 4 leafs on one side and 3 on other side may logically seems ok to bring the vehicle to even height but I say there is definetely some problem.(But DOnt panic)
Is this the bus which had Air suspension issue. If that is the case then there should be a tilt only at the rear and nothing should be at the front,right!.
Was there a problem before adding springs if not plz check the installations.
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Old 20th June 2010, 14:43   #253
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this slight tilt was there even before adding the extra leaves. the air suspension was fixed & then the new leaves were added.

no, this is not the bus which had the air suspension issue!
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Old 23rd June 2010, 08:40   #254
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There was a major difference in the odo reading between both the buses. the difference would be around 20 kms! since we knew the actual distance from allepey to certain locations, we knew that one of the bus had a faulty odo which was clocking more kms while the other one was working perfectly.

TVS replaced the odo of both the buses with new ones, free of cost. now it is working perfectly but now the odo reads 0 kms! our buses had run around 10000 kms before this!

By the way, we are getting an average of 4.15-4.25 kmpl on both the buses now, after the first service. a major improvement from 3.5-3.75 kmpl. is this okay or should it be more?

Last edited by raj_5004 : 23rd June 2010 at 08:49.
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Old 23rd June 2010, 16:03   #255
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By the way, we are getting an average of 4.15-4.25 kmpl on both the buses now, after the first service. a major improvement from 3.5-3.75 kmpl. is this okay or should it be more?
This is indeed a not bad figure. its bound to increse upto 4.75 max in sub service
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