Bosch VA Pump Leak

[fixmiester]

This message is a reply to an archived post by Dieseltech on February 18, 2017 at 08:59:51.
The original subject was "Re: IH 674 Bosch VA Pump Leak".

I have an EP/VA BR series pump on a 3500A loader (D239), and have done some o-ring replacements on the throttle and fuel control shafts about five years ago. Did it on-engine because these tractors have a large external frame that makes pump removal a real pain. Been running fine since, but have a progressive pump leak that is wasting a lot of fuel. Appears to be coming from between the pump head and the intermediate housing, but plan to replace all three large o-rings between the three sections. (Parts are getting hard to find; even o-rings!) Have owned the tractor for over forty years, and have used the chassis, engine and parts manuals religiously.

It appears that I can split the pump (carefully) with it on-engine, once the fuel lines and the banjo bolts are removed. The manual takes you through a complete rebuild process, but I don't plan on that. It says to remove both sides of the accumulator, then the cap screws on the square plate holding the pump distribution head and intermediate housings together. Since there's not much clearance between the pump and the engine, that may be difficult. Here's my question: Is there any reason to mess with the Accumulator assembly, in order to separate the hydraulic head/intermediate and Charging Pump sections? I don't plan on changing any of the timing or advance settings, as long as I put everything back together carefully.

I know these pumps are very complex, but the mechanical issues appear to be well documented, and with a large dose of common sense, doable...right? What do you pump experts think? 😱

 

[Dieseltech]

First off I would not even attempt it, you will get it apart, but I highly doubt you will get it back together. Unless you stand the tractor on end. Best to reseal the complete pump anyway. Just my biased opinion, do to forty plus years of injection pump repair. Too many times other leaks show up after the patch job was done, like the drive shaft seal leaking fuel into the crankcase..

 

[fixmiester]

Thanks for the quick reply Dieseltech. That was my biggest concern; keeping the roller assemblies and the cam plate/coupling undisturbed until reassembly. Don't think gravity is my friend here. Hmmmm, now tipping the tractor on end....that would give my wife something to really holler about! Maybe a few gallons of diesel fuel isn't such a big deal, but I just hate leaks in my stuff. Assuming parts are still available, what's the turn around time for a reseal job?

 

[Dieseltech]

I keep kits on hand for most pumps, last one I repaired and tested was headed back to the owner the third day. PROVIDING no major hard parts are damaged or missing. E-mail is open on Classic if you would have any questions..

 

[fixmiester]

Ok, thanks. I have some projects lined up this month, but can probably take it down next month. Wasn't sure what you mean by sending you an email through Classics; I only see one Classics forum here, and that's for trucks. Do you mean classified?

 

[Dieseltech]

I prefer Classic view on YT, some like Modern view..