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  #1  
Old 07-14-2013, 03:51 AM
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Old Gearbox need help

Hi, can anybody help, I have got an 1987 hymer with a 5 cyl none turbo derv engine but had a after market turbo and intercooler fitted, it has a 4 speed automatic box and this is where my problems are, it is full vaccum system with no cables or rods, there is a number on the flange just above the sump it is 6012705101720 11002 019716 this is the only number I can find but means nothing to me, there is a 4 pin block connected where the gear selected shaft comes out and single push on connecter just above it, it is leaking fluid from the single one, does anyone know what it is called and how to remove it so I can replace it, it also will not go into first gear by the stick but will set of in first and will go in when down shifting, but when I looked at the leak I can see a large rubber thing stopping it but it has a adjuster on it so may be able to sort that bit, but can any one give me advice on the leak and does any one know were I can get a diagram of the gear box to help in the future. thanks Dave





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Old 07-14-2013, 04:02 AM
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hi, been given a brake down of how too work the number out, and it seems that my gearbox is a: 720-110 w 4 a 018, any info or diagrams on how to fix this leak would be very much appreciated thanks dave
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  #3  
Old 07-14-2013, 04:52 AM
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Dave you are better off saying it is a 720-110

I think this was used in pagodas or something really close to it.

I've found a picture here



But may be there's a manual on one of the W113 sites. It was probably also used on other pre-1970 vehicles. There's a place in australia that advertises this type of transmission as a speciality =>

Welcome to N & K Transmissions

But I don't think that's really convenient for you.
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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

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Don't leave that there - I'll take it to bits!
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Old 07-14-2013, 08:22 AM
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What is a 1987 Hymer?
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Old 07-14-2013, 11:40 AM
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Hi wbain5280, a hymer is a German motorhome, best of Europe in its time, as carried US OF A parts like roof air con, genny, flush toilet with under body tank, etc etc , but the camper running gear was merc, put in google images merc hymer 660 cl, she may be an old girl but I love her, dave
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Old 07-14-2013, 11:57 AM
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Oh come on Dave - there's a subtle invitation to post up some pictures of your beauty (I mean the motor home of course!). I am surprised that a 1987 motor home has such an early transmission fitted...
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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
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Old 07-14-2013, 12:00 PM
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Hi stetch, yes I think Australia is a bit to far, but if I get no look in need couple of days I will email them for advise, they can only say yes or no, and yes that's the box I have just a couple of bolt on parts are different, but they would of used this box for allsorts, once again thank you dave
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Old 07-14-2013, 12:02 PM
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Hi stretch, yes I will get the kids to put some photo`s of the hymer on as soon as they get home, dave
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Old 07-14-2013, 12:32 PM
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Saw a lot of Merc camper type vehicles on my cross country drive. Looked like modified Sprinter vans with Bluetec. Seems a whole lot more maneuverable and efficient than the giant rolling houses that some people drive around.
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  #10  
Old 07-14-2013, 12:55 PM
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HYMER DAVE & Stretch:

The first part of the number sequence can be read as: 601 270 51 01.
That is a MB part no. associated with either chassis type 601, or with engine type 601. (I think probably with engine type 601)

The second part of the number sequence, 720 110 is associated with the transmission type. From the appearance of the bell housing in the picture posted by Stretch it would contain a Fluid Clutch rather than a torque convertor. A Fluid Clutch would be consistent with a K4A trans type, which is the type used in the 113 chassis. If there was a version of that trans that was equipped with a torque convertor, then it would indeed be designated a W4A.

If the trans in the Hymer matches the one in the photo posted by Stretch, then it is of a later series of transmissions and would be designated W4B xxx. The numbers in the xxx location refer to the torque capacity of the of the trans. Example: W4B 025 (used with OM615/616/617).

The earlier trans, K4A, which was used in the 113 chassis, has a large three position solenoid mounted on top of the trans case just aft of the bell housing.

HD: Pics of the right side of the trans will help to identify.

Last edited by Frank Reiner; 07-14-2013 at 02:10 PM.
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  #11  
Old 07-15-2013, 09:28 AM
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The 720.110 transmission was used in the T1 vans (209D/309D/409D), also known as the Bremen Transporter. The Hymer was probably built on the T1 chassis, so it is not strange that the 720.110 transmission is installed. It is not an old one.
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  #12  
Old 07-15-2013, 06:08 PM
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Hi all, well we are getting somewhere, yes I do believe its a w4a as I can see the what looks like a torque converter looking in the fins on the bell housing, went looking in all paper work I got with it years ago and it is built on a t1 409d chassis number starts with 611, went to my local merc dealer when they opened today but they only do cars now, but told me of a place to send photos to and they are going to get back to me tomorrow, tried one of them on line ask an expert, who said it my reversing(back-up) light senor but if plugged in or no lights work ok, waste of 27, right as promised going to try and put some photos of my beauty, if it fails my lad said he will help me tomorrow, dave





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  #13  
Old 07-15-2013, 06:26 PM
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OOOPPPSSS, yes we forgot to change the number plate on the pop-up from the car to the hymer, and I must admit I never up loaded the photos my lad came in as I was trying, dave.
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  #14  
Old 07-16-2013, 02:01 AM
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Dave you should have said you are in the UK. I'm not local to any part of the UK any more but you should be looking at

FEDERATION OF AUTOMATIC TRANSMISSION ENGINEERS: Automatic gearbox repair find members for repair Fedauto for someone in your area who knows what they are talking about.

More tips are given here

http://www.honestjohn.co.uk/faq/automatic-transmission-specialists/

Trust in the John - the Honest John!
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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
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  #15  
Old 07-16-2013, 05:17 AM
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Here is a parts diagram of the 722.110 transmission:



I think the leaking part is 92 and 95, but I'm not entirely sure:



You might just need to replace #95, the seal ring.


Last edited by Govert; 07-16-2013 at 07:49 AM.
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