Pump service parts D series

["Manic-Mechanic" 1,195]

Hello,

   I have been trying to figure out the Service Bulletin on the Spline Washer 106641 and the (Front Transmission Bracket, in from of the Pump) 106645. Has anyone actually used this kit? If so, does the Spline Washer meet up with Pump Shaft tightly, where-in the Front Bracket would have a larger hole for the Spline Washer to fit through? Or does the pump shaft protrude through the bracket deep enough that spline washer sits in front of it? If the washer sits in front of the bracket then the OD of the washer wouldn't matter, right? However, if not, then there would be a bind.

 

ServiceBulletin_WH61-90_217_780200_Driven_Coupling_103029_D-Series.pdf ServiceBulletin_WH61-90_305_810400_Failed_Driven_Coupling_103029_D-Series.pdf

 

I see in this old post picture (1975) the spline washer is tightly wedged between the drive coupler and the pump shaft flange. Standard front bracket would not accommodate this configuration as the hole is too small for the OD of the spline washer. I do not think this was mentioned whenever this photo was posted on this very subject. Standard front pump bracket this would all be so tight against the bracket that it would essentially hold fast as solid mounting point.

 

 

It stands to reason the mysterious front bracket (106645) is NLA, drilling out the standard front bracket may result in stress. I propose fabrication of a wider front bracket to accommodate whatever sized OD spline washer you may use in 17 tooth spline at the correct thickness? Should this whole coupling in this manner even be necessary? Likin the 1/4" keyed design in sync with the teeth on both shaft and drive coupler as put forth by Sarge.

Edited April 14, 2022 by "Manic-Mechanic"

[JoeM 7,874]

I had a D160 and that coupling was problematic. As a matter of fact the hydraulics in general were an issue. I had a FEL on mine and the tubes running from the hydro pump the the drive motor would work and leak. 

I really just moved into a 520H for those reason.

By reading the service bulletin, that washer forces the coupling a little forward in a preload and reduces the amount of float in the splines? Even the part of using a timing light to assure alignment indicates a delicate set up.

The splines on my pump were worn and removed the washer to buy some time. The washer was not in my mind a permanent fix.  I did have a spare pump and ended up changing it and it worked fine without the washer until I sold the machine. I just prefered more spline engagement.

The machine ran about an hour once a week, limited use.

This has taxed my memory that has been a good while ago. 

Trying to remember if i used a small bolt and washer in the front of the pump to hold the coupler on tighter to the shaft. It has been a while. 

Hope this helps

 

 

["Manic-Mechanic" 1,195]

5 minutes ago, JoeM said:

I had a D160 and that coupling was problematic. As a matter of fact the hydraulics in general were an issue. I had a FEL on mine and the tubes running from the hydro pump the the drive motor would work and leak. 

I really just moved into a 520H for those reason.

By reading the service bulletin, that washer forces the coupling a little forward in a preload and reduces the amount of float in the splines? Even the part of using a timing light to assure alignment indicates a delicate set up.

The splines on my pump were worn and removed the washer to buy some time. The washer was not in my mind a permanent fix.  I did have a spare pump and ended up changing it and it worked fine without the washer until I sold the machine. I just prefered more spline engagement.

The machine ran about an hour once a week, limited use.

This has taxed my memory that has been a good while ago. 

Trying to remember if i used a small bolt and washer in the front of the pump to hold the coupler on tighter to the shaft. It has been a while. 

Hope this helps

 

 

If memory serves, did the spline  washer fit through the front mount bracket or did the pump flange extend past the bracket? Trying to figure out if whenever I install rebuilt pump & motor that I will need both bracket 106645 and spline washer 106641 The replacement bracket must have a larger diameter hole? I have never even seen this mysterious bracket