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drive pinion on a Ransomes Marquis

#1

K

keith2001

Hello,
The drive pinion on my Ransomes Marquis is broken and I want to replace it. However I don't succeed in taking off the broken one.
Can somebody help me?
Thank you,DSC04547.jpg


#2

mistermowerman

mistermowerman

keith2001 said:
Hello,
The drive pinion on my Ransomes Marquis is broken and I want to replace it. However I don't succeed in taking off the broken one.
Can somebody help me?
Thank you,View attachment 22566
Click to expand...

Hello , the sprocket is most likely on a left hand thread ,seeing that the sprocket is ruined already, grip the shaft in a vice and undo as if you are tightening . Gary


#3

K

keith2001

mistermowerman said:
Hello , the sprocket is most likely on a left hand thread ,seeing that the sprocket is ruined already, grip the shaft in a vice and undo as if you are tightening . Gary
Click to expand...

Thank you Gary.
Now I found out that the bearing misses a ball and is blocked. My spare-bearing doesn't fit. Where can I buy one - for a Ransomes Marquis MK 5M.

Thank you
bearing.jpg

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#4

mistermowerman

mistermowerman

keith2001 said:
Thank you Gary.
Now I found out that the bearing misses a ball and is blocked. My spare-bearing doesn't fit. Where can I buy one - for a Ransomes Marquis MK 5M.

Thank you
View attachment 22584
Click to expand...
Hello ,if you look in Yellow Pages and see if there is a bearing supplier local ,if you take your old bearing with you they should be a able to match one up as they are a standard bearing .Other wise if you have a bearing of the same type you can fit another roller ball by twisting the cage around then pop the other ball in , then wash out the bearing with petrol and repack with grease .Gary


#5

K

keith2001

mistermowerman said:
Hello ,if you look in Yellow Pages and see if there is a bearing supplier local ,if you take your old bearing with you they should be a able to match one up as they are a standard bearing .Other wise if you have a bearing of the same type you can fit another roller ball by twisting the cage around then pop the other ball in , then wash out the bearing with petrol and repack with grease .Gary
Click to expand...

Thank you.
I did find the bearing 1203 and replaced both. It works.

But now I have another problem:
There's a knocking noise coming from the flywheel.
It seems that the drive shaft from the engine isn't fixed for 100% to the flywheel.
if you turn the flywheel for a few millimetre, the drive shaft isn't turning.
Screw nr 3 on the flywheel seems not to be tightened for 100%, when i tighten the screw
there no knocking noise anymore for 1 minute, then it comes back.
Changing the screw nr 3 and nr 2 doesn't help.
How can I fix this?
Thank you.

Picture expl:
1 - drive shaft
2 - screw
3 - screw
4 - flywheel
DSC04567a.jpg


#6

mistermowerman

mistermowerman

keith2001 said:
Thank you.
I did find the bearing 1203 and replaced both. It
But now I have another problem:
There's a knocking noise coming from the flywheel.
It seems that the drive shaft from the engine isn't fixed for 100% to the flywheel.
if you turn the flywheel for a few millimetre, the drive shaft isn't turning.
Screw nr 3 on the flywheel seems not to be tightened for 100%, when i tighten the screw
there no knocking noise anymore for 1 minute, then it comes back.
Changing the screw nr 3 and nr 2 doesn't help.
How can I fix this?
Thank you.

Picture expl:
1 - drive shaft
2 - screw
3 - screw
4 - flywheel
View attachment 22625
Click to expand...

Hello ,just to confirm that you did not lose the drive key on the engine drive shaft when you put the flywheel on.If it is there make sure it is not worn(not square) if you need another one it is a standard size .Gary


#7

K

keith2001

mistermowerman said:
Hello ,just to confirm that you did not lose the drive key on the engine drive shaft when you put the flywheel on.If it is there make sure it is not worn(not square) if you need another one it is a standard size .Gary
Click to expand...

Thank you once more for your help!

I used this machine for 1 year and it was absolutely running fine.
All of a sudden the knocking began.

To take apart the flywheel, do I dismantle the drive shaft+clutch?
How can I take the flywheel?

Thank you, Gary


#8

mistermowerman

mistermowerman

keith2001 said:
Thank you once more for your help!

I used this machine for 1 year and it was absolutely running fine.
All of a sudden the knocking began.

To take apart the flywheel, do I dismantle the drive shaft+clutch?
How can I take the flywheel?

Thank you, Gary
Click to expand...

Hello ,i asked about the flywheel key because you said there was free play from the engine shaft to the heavy cast flywheel located by the grub screws you had pointed out ,that would cause a knocking noise ,otherwise it may be coming from the clutch which is bit attached to the flywheel and covered by dish attached to the shaft .the answer to your other question is you will have to take the shaft out again or move the engine back .give it a go ,best of luck Gary


#9

K

keith2001

mistermowerman said:
Hello ,i asked about the flywheel key because you said there was free play from the engine shaft to the heavy cast flywheel located by the grub screws you had pointed out ,that would cause a knocking noise ,otherwise it may be coming from the clutch which is bit attached to the flywheel and covered by dish attached to the shaft .the answer to your other question is you will have to take the shaft out again or move the engine back .give it a go ,best of luck Gary
Click to expand...

I removed the engine from te mower, and took some pictures.

The key seems to fit on the flywheel but not on the engine's output shaft.
You can easily move it, it seems to small.
Is it a wrong key?

I have a spare Marquis but with a BSA engine, I could take that key if it fits.





"picture 1": the keyway on the engine's output shaft.
It doesn't seem damaged to me.

"picture 2": the key in the flywheel.

"picture 3": the key with its sizes. 4,4mm x 4,4mm x 44,3mm,
if you look closely you'll see it has a bit of damage of the screw


"picture 4": the key on the engine's output shaft.
It doesn't fit for 100%, it is a little loose, easy to move.

"picture 5": the flywheel cleaned.

Thank you,
DSC04569.jpgDSC04574.jpgDSC04577.jpgDSC04578.jpgDSC04582.jpg


#10

mistermowerman

mistermowerman

keith2001 said:
I removed the engine from te mower, and took some pictures.

The key seems to fit on the flywheel but not on the engine's output shaft.
You can easily move it, it seems to small.
Is it a wrong key?

I have a spare Marquis but with a BSA engine, I could take that key if it fits.





"picture 1": the keyway on the engine's output shaft.
It doesn't seem damaged to me.

"picture 2": the key in the flywheel.

"picture 3": the key with its sizes. 4,4mm x 4,4mm x 44,3mm,
if you look closely you'll see it has a bit of damage of the screw


"picture 4": the key on the engine's output shaft.
It doesn't fit for 100%, it is a little loose, easy to move.

"picture 5": the flywheel cleaned.

Thank you,
View attachment 22639View attachment 22640View attachment 22641View attachment 22642View attachment 22643
Click to expand...
Hello ,i think we have found the problem ,the flywheel in the past has come loose on the shaft causing the damage ,you will need to clean the two grooves and using a new or perfect key put it together, if the groove on the engine shaft is not perfect the key will not locate the flywheel . There is some liquid metal stuff in tubes that may mend the damage though .Gary


#11

K

keith2001

mistermowerman said:
Hello ,i think we have found the problem ,the flywheel in the past has come loose on the shaft causing the damage ,you will need to clean the two grooves and using a new or perfect key put it together, if the groove on the engine shaft is not perfect the key will not locate the flywheel . There is some liquid metal stuff in tubes that may mend the damage though .Gary
Click to expand...
I first tried to replace the key.
As I live in Belgium they have no stock of imperial keys only metric, so
I bought a 5 x 5mm oversized and filed until it fitted on the crankshaft.
Stange,it did not fit on the flywheel, so I filed half of the key to fit the flywheel.
Strange that it is not a square size.
The key fits now in both, but is asymmetric.

The engine doesn't make a knocking noise anymore on a first test.
As it rains today I hope to cut the grass tomorrow, let's hope it stays ok.
I will let you know in a few days if everything is working.
Thank you very much for your help.


DSC04595.jpgDSC04598.jpgDSC04597.jpg


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