743 or 743B

Tazza said:

One other thing to look at is the chain case, do the drive motors mount to a block that is about the same size as the drive motor? this is the drive motor carrier.
The 743 had a reduction box, the 743B i believe were all essentially direct drive through the drive motor carrier.

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[email protected] said:

i thought the b meant basic, not heat no aux hydraulics etc?

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Tazza said:

One other thing to look at is the chain case, do the drive motors mount to a block that is about the same size as the drive motor? this is the drive motor carrier.
The 743 had a reduction box, the 743B i believe were all essentially direct drive through the drive motor carrier.

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dyoung said:

Tazza, I'm a little confused by your answer. Do you want me to look at where the Hydrostatic Motors attach behind the inspection plate? I notice on the rear wheels is what appears to be a reduction gear case! I was pressure washing the machine and noticed an 1/8" hole on the left side. Is this a vent for the gear case and if so, shouldn't have a venting cap to keep water from getting into the case?

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7LBSSMALLIE said:

as to determining ( could be wrong? maybe a s,n break. but the upgrade on the b = pop off axle hub.(thereby allowing axle seal replacement without removining sprockets. another upgrade was the removal of the stop cable. goining to a fuel shutoff solenoid. keep in mind replacing ax seals on old ax was a bear. (indication of pop off hub is big ass bolt in center of hub,( between lugstuds)

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antfarmer2 said:

He said he had the one piece axle thinking it is a 743

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7LBSSMALLIE said:

thath would confirm 743. whats the issue dude ?

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dyoung said:

From the picture it is clear I have a 743 and not a 743 B which is the decal set on the machine. I guess this is another example of buyer beware. I purchased the unit from a neighbor who owned the unit since 2001 and is a mechanic who owns his own shop. I wanted the 743B because a friend has attachments I could borrow but I am assuming they will work still on the standard 743B. The fact that the unit was built in May of 1991 lead me to believe it was a 743B. Did they make 743 and 743B concurrently? It looks like one axle seal is leaking a little but it is going to have to get much worse before I replace the seal.

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antfarmer2 said:

The 743 will use the same attachments seals are much harder I just did mine pick it up and see if there is any play in the axle if so do the bearings to 50 bucks per axle

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dyoung said:

Thanks for the input. Did you have to use any special tools to install the bearing race. The manual shows a couple of specialty tools. I figure the bearing removal could be done in my press much like some old car axles. They show an install tool for pushing the seal into the housing straight, not sure if you really need that one if you took your time pushing the seal into the housing.

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antfarmer2 said:

The outside is easy the inside is a pita I tryed many ways but ended up useing a ten ton porta power with a tiny ram I took the whole chaine case off to do it to put the seals in I used tazza's trick and cut two old races in half and a hose clamp to hold them worked great

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antfarmer2 said:

Got the bearings .....races.....and seals for 50 bucks from loaderscourseparts per axle but had to bend over for bobcat for the ware sleves 20 each

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antfarmer2 said:

Hit refresh to talk better

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dyoung said:

From the picture it is clear I have a 743 and not a 743 B which is the decal set on the machine. I guess this is another example of buyer beware. I purchased the unit from a neighbor who owned the unit since 2001 and is a mechanic who owns his own shop. I wanted the 743B because a friend has attachments I could borrow but I am assuming they will work still on the standard 743B. The fact that the unit was built in May of 1991 lead me to believe it was a 743B. Did they make 743 and 743B concurrently? It looks like one axle seal is leaking a little but it is going to have to get much worse before I replace the seal.

Click to expand...