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Dear Sainani Ji,It is evident from the photographs that this happened only due to internal explosion . In my opinion looking to condition of Main Begun , as main Begun seized due to Oil Starvation and connecting Rod bent and broke Engine Block.In my opinion this is a strong possibilities.Rakesh Soni
Sent from my iPhoneDear Sainani,The Engine Block has cracked due to the force exerted by the internal components of the engine. The connecting rod is the culprit. Connecting Rod is broken. This can only happen if there is a hydrostatic lock. The photos of connecting rod clearly shows that it has bend before breaking up. Now the question that is to be answered is when did the hydrostatic lock occur. There is only two possibilities. 1. while the vehicle fell 2. The restarting of engine after the vehicle was lifted. Please comment on my views.RegardsBinu Varkey
On Fri, Feb 12, 2016 at 7:31 PM, Sainani M S <adjuste...@gmail.com> wrote:
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M S Sainani
BE, FIIISA, DCII (London)
SLA 15187 (3/3/17)
(+91) 9414168144 | sai...@adjusterindia.com |Phone # : +91 294 2490256
United Technical Services (Approved Valuer, Chartered Engineer, Surveyor & Loss Adjuster) | 1 - Vinayak Nagar, Bohra Ganesh Ji Main Road | Udaipur - 313002, Rajasthan
Every Job is a Self Portrait of the Person who did it, Autograph your work with Excellence.
All Insurance Claims related communication is Without Prejudice.
Dear Sir,Most of technical analysis has already been elaborated by members & are very authentic. I also want to add one; that if con rod broke due to hydrostatic locking seizure will not be there, thus probability of breakage of con rod by starvation of oil either during running or while it overturning is looking much relevant.We may have a proper check for oil pumping system & may relate the seized con rod with it.With best Regards.B. B. RAI
For M/s Safety First Insurance Surveyor and Loss Assessor Pvt. Ltd.,408, Geetanjali Tower,Near Civil Line Metro Station,Ajmer Road, Sodala, Jaipur.Contact 0141-4113232, 7792960002Fax No. 0141-2220099
On Sat, Feb 13, 2016 at 9:08 AM, Binu Varkey <binu.s...@gmail.com> wrote:
Dear Sainani,The Engine Block has cracked due to the force exerted by the internal components of the engine. The connecting rod is the culprit. Connecting Rod is broken. This can only happen if there is a hydrostatic lock. The photos of connecting rod clearly shows that it has bend before breaking up. Now the question that is to be answered is when did the hydrostatic lock occur. There is only two possibilities. 1. while the vehicle fell 2. The restarting of engine after the vehicle was lifted. Please comment on my views.RegardsBinu Varkey
On Fri, Feb 12, 2016 at 7:31 PM, Sainani M S <adjuste...@gmail.com> wrote:
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Sirs,1. Restarting the engine & connecting rod breaking is not acceptable. It is not easy to break a connecting rod which is strong steel casting itself. Again battery power can only rotate the engine & maximum power would occur after ignition begins & engine running on its own. Even with the assumption that there occurred a hydro static lock (when engine not running), the connecting rod may bend but chances of its complete breaking is very less.2. In the said accident, maximum seizure took place between liner & piston surfaces. No doubt, big end bearing too got damaged but slightly. In case of extreme seizure white metal of the big end bearing chips out/melts off.3. Breaking of the connecting rod means, full power was being exerted & suddenly some thing having been entered into combustion chamber.This could be a broken piece of piston ring, broken suction or discharge valve or sudden entry of fuel from broken injector mouth. But all these things do not relate with seizure. Seizure did take place.4. To me it appears that seizure took place due to lack of lubricating oil, liner got broken due to excessive heat/friction & suddenly cooling water entered into combustion chamber from the broken liner, creating a sudden & heavy hydro static lock within no time & in more or less full power & the connecting rod getting maximum thrust simply broken down..5. Another probability is that the crane was lifting a very heavy load, engine worked on more than its designed capacity or power, engine got overheated, piston & liners rubbed due to excessive heat causing seizure like situation, connecting rod got maximum thrust & it eventually gave up & broke.I very much appreciate Mr. Sainani for bringing up such live situations & would appreciate more if he discloses his final decision.S.K. SharmaOn Sunday, 14 February 2016 11:00 PM, Binu Varkey <binu.s...@gmail.com> wrote:
Dear Sainani, Girimaji and Other Active Participants.I would rather state that the hydrostatic lock caused by the oil in the head has caused bending, shearing and breaking up of the connecting rod and pressure so caused had damaged the bearing, piston and cylinder, cylinder block. This has happened only due to starting of engine after bringing back the hydra on to the wheels without draining out the oil that has accumulated in the head. There is only a very remote chance of engine getting damaged due to tilting of hydra to one side. If it was due to starvation of oil then it should affect all the cylinders, pistons, connecting rods and allied items in the same manner. I strongly believe that the damage to engine in this case is due to hydrostatic lock.RegardsBinu VarkeyOn Sun, Feb 14, 2016 at 9:18 PM, Girimaji Ashok <avan...@gmail.com> wrote:Dear FriendsThe mail of Mr. Rakesh Soni is very clearly evidencing the fact that the cause of loss is the failure of main bearing ( big end bearing of con. rod). It is extremely clear for me at least.Failure of main bearing is by all means one of the main probable cause of loss which cannot be discounted.We are still at the analysis stage.i always look at the confidence of the participant rather than the English grammar.Experience & confidence of the participant is more important than the Grammar / spell mistakes.instead of understanding , pointing out spell mistakes i believe is demotivating.Hurting the feelings of some one is not my intentions.I believe in more & more participation.Participation is enhanced by confidence & experience & motivation rather than improved grammar of English.As it is the participation is very very low.On Sun, Feb 14, 2016 at 7:15 PM, ANIL JAUHRI,Surveyor and Loss Assessor <anilj...@gmail.com> wrote:When the crane overturned obviously it was in some gear. The oil in the chamber shifted to left side causing lean lubrication to main and big end bearings. All engines are set on some idle rpm. The diesel engine being a close circuit it remained started till the resistance by seizure on bearings make the engine stop. Since the vehicle remained overturned for a certain hours say atleast three four hours, the engine oil because of running engine heat had a lower viscosity reached the piston top. Now the crane was put on wheels. The owner without taking due precautions started the engine. The oil on piston top created hydrostatic lock. The owner just to keep the engine started over accilerated it causing bent of connecting rod and finally broke it. The broken peice mounted on crank due to revolution broke the block and chamber. The seizure mark on pistons are due to lack of lubrication. This extension of loss is not covered by the policy. The insured is concealing the fact that he started the engine without taking due precautions or waiting for oil come down from engine top. His ignorant negligence has extensively increased the loss
Anil JauhriOn 14 Feb 2016 13:15, "Gulzar Mathauda" <gulzarm...@hotmail.com> wrote:Respected Surveyor BrothersIt is indeed very good that we are enhancing our knowledge by mutual discussions on board on various subjects.We are all qualified engineers and while putting our opinion on board we must be sure of the subject and must put it in a proper way and sequence particularly caring for proper technical names and their spellings.With out meaning any disrespect, and with advance apology that just i have seen a mail in which term asMain Began, for Big end bearing has been used.i again emphasize that we must use proper terms and correct spellingWarm Regards
Sqn Ldr Gulzar Singh, (RetdSurveyor
From: insurance-su...@googlegroups.com <insurance-su...@googlegroups.com> on behalf of Rakesh Soni <rakesh...@yahoo.co.in>
Sent: Saturday, February 13, 2016 9:21:53 AM
To: insurance-su...@googlegroups.com
Cc: Sainani M S; Insurance Adjusters; iiisla-bengal; iiisla-technical-group; IIISLA GROUP; Insurance_Surveyors
Subject: Re: Engine Failure - Hydra Crane - Pre / Post toppling engine failure / crank case bursting
Dear Sainani Ji,It is evident from the photographs that this happened only due to internal explosion . In my opinion looking to condition of Main Begun , as main Begun seized due to Oil Starvation and connecting Rod bent and broke Engine Block.In my opinion this is a strong possibilities.
Rakesh Soni
Sent from my iPhone
Dear Sainani,The Engine Block has cracked due to the force exerted by the internal components of the engine. The connecting rod is the culprit. Connecting Rod is broken. This can only happen if there is a hydrostatic lock. The photos of connecting rod clearly shows that it has bend before breaking up. Now the question that is to be answered is when did the hydrostatic lock occur. There is only two possibilities. 1. while the vehicle fell 2. The restarting of engine after the vehicle was lifted. Please comment on my views.
Regards
Binu Varkey
On Fri, Feb 12, 2016 at 7:31 PM, Sainani M S <adjuste...@gmail.com> wrote:
Dear Friends,--
There is a Escorts Hydra Crane 1242 about One & Half Year old which got toppled to LHS (filter side) & RHS (FIP Side) crank case is punched by a broken con rod associated with Cab & Roof damages due to toppling. There are two probable causes of loss as perceived:
- Bursting of Engine while running resulting in startled driver (imbalanced engine reactive forces) leading to toppling of Hydra Crane (possibilities like Hydro Locking due to ingress of leaked fuel / coolant, Oil Starvation are ruled out already which could have resulted in breakage of Con Rod).
- Toppling of Hydra Crane resulted in breakage of con rod punching the crank case from inside with one of the liner bottom skirt broken.
Few Digital pictures are enclosed for colleagues to share their experiences / knowledge & expertise about similar situations (sequence & root cause analysis) even in other equipments as to above deliberations / situations evaluating any other possibilities preferably with reasonings.
Breg
M S SainaniUdaipur
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ASHOK GIRIMAJI
Insurance Surveyor & loss Assessor
Chartered EngineerSHIMOGA - 577201KARNATAKA
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