[DKG]

Originally Posted by nitrous

We never do obstacles sideways.

where did this happen nitrous?

[Samurai]

Originally Posted by Spitfire

Back to the discussion:

Hope you have this:

Thanks, no I didn't have it. I had asked Behram Dhabhar for it though.

[nitrous]

Originally Posted by DKG

where did this happen nitrous?

Attachment 22527

Lol! Thats a result of a jeeper's friend getting over-enthusiastic. It was after we finished the Palar in january 2007 . This dude drove the jeep fast without watching the track on the narrow path .

This happened during transport.

[Spitfire]

Originally Posted by Samurai

Thanks, no I didn't have it. I had asked Behram Dhabhar for it though.

I have rest of the details, you want me to post them here?

[Samurai]

Originally Posted by Spitfire

I have rest of the details, you want me to post them here?

Oh yeah, please. But is this Classic or CJ340? There are minor differences I think.

[Spitfire]

I had a Operators Manual issued by Mahindra in 1992 for the CJ, NC, MM, FJ Series of vehicles with Diesel Engines.

The below is an extract from it. I cant find the original but I had typed down all the details to a word file long back. Will look for the manual.

Model: CJ - 340 DP 4 Wheel Drive

Engine: 4-90 Diesel

Curb Weight(4WD): 2640Lbs/1200kgs

G.V.W:2500Lbs/1590kgs

Axle Front: 4WD: Full floating hypoid type with 5.38 ratio

Axle Rear: Semi floating hypoid type with 5.38 ratio

Frame: Ladder type steel channel side members

Brakes: Service Hydraulic internal expansion non-servo floating shoes, 279.4 mm (11")
Parking: Mechanical operated on rear propellershaft

Clutch:Single dry plate 23.5 cm(9 1/2") dia.

Suspension:Semi-ellptic, leaf tyre springs with hydraulic double acting telescopic shock absorbers.

Cooling:Radiator fin and tube type pressurised cap 0.63 kg/sq cm(9 psi)

Fuel Tank:40 Litre capacity

Electrical:12 Volt, 22 Amps Generator/35 Amps/ Alternator

Instruments: Speedometer(km/h) Temperature & Fuel guages, indicators for charging oil pressure, high beam & turn signal

Steering:Worm & roller type, right hand,
Turning radius 5.3m(17-1/2')

Transmission:4 forward and one reverse, 2nd 3rd & 4th synchromesh
Gear ratios: 3.986:1, 1. 473:1, 1:1
Reverse: 5.315:1

Transfer Case:Two speeds with ratio 2.46:1 and 1:1

Wheels and Tyres:5 disc type 5-50x15 with F78x15
6 ply- highway/ Cross country

Engine Specifications:
Cylinder block:Cast Iron
Cylinder Liner:Removable wet type
Crankshaft:Forged steel, 5 bearing journal
Connecting rods:Forged steel
Main Bearings:Aluminium tin
Pistons:Aluminium
Cylinder head:Aluminium with turbulance chanbers
Camshaft:Chilled casting, 3 bearing
Valves:Overhead, rocker arm operated
Timing:Gear operated
Lubrication:Pressure Lubrication
Cooling:By water
Bore(mm):90
Stoke(mm):83
Cubic Capacity:2112
Compression ratio:22.4/1
Operating cycle:4-stroke(order 1-3-4-2)
Cylinders:Inline arrangement
Max BHP: 62 @ 4500rpm
Max Torque:12.3 Kgm (89 lb.ft) @ 2000 rpm

Someone here said the wheels were 16" and not 15" but this manual says 15" can anybody else verify?

No the abve is not for the Classic but for the CJ340DP 4WD.

Classic: CL340DP4WD

[Spitfire]

Found a scanned copy of the MM 540 DP manual real old one on my desktop HDD. Cant attach it here. Its 30 MB. It is the above manual i was talking about.

[Samurai]

Wow! Thanks a lot Spitfire, that's precious.

Originally Posted by Spitfire

Axle Front: 4WD: Full floating hypoid type with 5.38 ratio

Axle Rear: Semi floating hypoid type with 5.38 ratio

First let's consider these two items. When I had a close look at the front and the rear, I couldn't see any difference. Why is one called full floating and the other semi-floating?

See the following series of photos:

Front Axle:





Rear Axle:







They both appears as if the body is suspended on the ends of the leaf spring and the middle is supported by the live axle. Now, why is one called full floating and other semi-floating?

BTW, for the uninitiated, live axle means an axle that has a differential. An axle without the differential is called dead axle, as in front axle of a 2WD Jeep.

Next question, what is this apparatus under the driver seat?



This fuel line looks dangerously dangling, is it safe in off-roading conditions?



That's the rear drive shaft in the center (in focus) I suppose.

[Samurai]

This old vs new 4WD thread took away all attention. Can I get some answers to my above questions please...

Just had a visit to the garage. After identifying multiple small leaks in the radiator core, we have decided to replace the radiator core, costs about 3K. Monday it will also receive a full flegded anti-rust treatment to withstand this humid monsoon.

[Alfa_Kilo]

The front and rear axles (axle is the entire beam) look similar because they have common diffs (the hump in the middlr, 10 spline Dana 44). The front axle, obviously has steerable ends.

The reason why the rear is called semi floating is because the rear wheel is supported partially by the driveshaft and a taper roller bearing. The driveshaft (or sometimes called the halfshaft, the link between the diff and the wheel) provides torque, supports the weight of the vehicle and the cornering, accelerating and braking forces.

At the front end, the wheel is supported entirely by two opposed taper roller bearings. The front driveshafts just provide the torque. So it is called a full floating axle.

Full floating and semi floating has nothing to do with leaf springs (ie the suspension)

That bracket under the driver's seat, on the outside of the chassis long member supports the pivot for the brake pedal and the brake master cylinder ( seen towards the right in the pic). There is a split pin which hold things in place over there. Keep an eye on that, as it tends to wear away and snap.

You should get your fuel lines routed properly, try to replace them with SS braided ones.

[DirtyDan]

Full floating axle:

The axle does not support the weight of the vehicle. It only transmits power to the wheels from the differential. The wheel in this case is attached to the axle housing upon which it spins freely and it will do so whether the axle is there or not. The axle housing supports the weight of the vehicle via the wheel.

Semi floating axle:

The axle supports the weight of the vehicle AND transmits power to the wheel from the differential. The wheel is attached to the axle only. Take out the axle and the wheel goes too and will not, of course, spin with movement of the vehicle.


At least, that is what I THINK it is. If I muffed it, somebody please scourge me severely.

[DKG]

To add to what the others have correctly stated I think the full floaters on the rear are also easily recognizable by lockable hubs. While technically this is not essential I think a good full floater would provide this feature so that when you break the axle you can unlock the hubs and still tow the vehicle. I should think most military spec vehicles would come with such full floaters.

[Samurai]

Ok, I am still not getting it correctly. Can someone post couple of images that can clearly illustrate the difference between full-floating and semi-floating, may be a cross section of the drive shaft.

Meanwhile, I removed the soft top today so that I can give it for anti-rust painting on Monday.

Checkout the beauty without the soft top.

[DirtyDan]

Originally Posted by Samurai

Ok, I am still not getting it correctly. Can someone post couple of images that can clearly illustrate the difference between full-floating and semi-floating, may be a cross section of the drive shaft.

No, we can not. Images do not easily show it. His choice of the term "drive shaft" was unfortunate as it means the propeller to most whereas what he should have meant was axle, mostly.

I will try again. To float or not to float, that is the question. What is "floating", or not, is the axle.

Imagine your ball point pen is your axle structure. Outside is the plastic housing, inside is the metal ink cartridge. The ink cartridge is the axle and the plastic housing is the axle housing.

If it is floating then the wheel is connected via bearings to the plastic housing, the outside of the pen. The axle housing then bears the weight of the vehicle. If it is semi floating then the wheel is connected to the ink cartridge, the axle, via lugs and the axle rides on bearings AND ALSO SUPPORTS the weight of the vehicle.
Because full floating axles do not have to support the weight of the vehicle they are stronger, usually, and this extra strength gives you a more robust off-roader.

[Samurai]

Thanks Dan, your pen analogy helped a lot. I was thinking that the whole thing including the housing as axle. Now it makes sense. When people say axle break, they don't mean housing, just the rotating part inside. In case of semi-floating, if the inside axle breaks the wheel will come out then. In full floating the wheel will stay intact, but no torque will be delivered to it. The front wheels can still take you home.