hYDRAULI PUMP SEALS CONTINUE TO BLOW EVERY 3-4 HOURS OF OPERATION

Has this only happened since you replaced the pump? Some of the pumps have a non-adjustable by-pass valve built in. If yours does it could be stuck closed from debris behind the spring – it would be the large silver nut on the pump. There is also an adjustable pressure relief valve on the direction control valve that by-passes to the reservoir which could also be the problem with debris. Have you checked the system pressure? It should only be 60 – 70 psig maximum, 50 – 60 psig preferred. Except for this issue, does the clutch seem to operate correctly?

I’m thinking one of two things, or a combination of both.

1) You aren’t pausing in neutral before shifting from forward to reverse, causing a pressure spike. Do you know if your accumulator is working properly? This should absorb any pressure spikes.

2) Set your relief valve pressure to 40 psig.

Trying to figure out what question you were asking about trying to identify a part. Where is pic?

That picture you posted is the pressure relief valve that is attached to the direction control valve with U-bolts. That is where you can adjust the pressure.

Bob since I see you are looking here when you change out coolant do you fool with adding a can of  water pump lubricant ? I do not see it  on store shelves like you used to see.

DavidPrivett wrote:

Bob since I see you are looking here when you change out coolant do you fool with adding a can of water pump lubricant ? I do not see it on store shelves like you used to see.

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It’s like snake oil anymore. Modern coolants have lubricity formulated into them, and the seals nowadays are mechanical  carbon/ceramic not the lip type that fail from microscopic debris in the system. That said, if your coolant pump has a zerk fitting or uses a packing gland, it wouldn’t hurt.

DavidPrivett wrote:

Bob since I see you are looking here ……….

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Apparently Arthur’s issues aren’t a big priority, so waiting for a response from him is like watching paint dry.

no zerk,the reason I asked was the water pump shaft sheared between the  bearings and seals then launched the fan into the radiator. I have never seen that, the tractor mech. down the road said he had never seen it either. The pump housing was clean the bearings were not frozen it was not weeping, I am scratching my head ordering new parts.

I’ve seen it before, but on trucks not tractors or earthmoving equipment. It was attributable to a slightly unbalanced fan assembly that created harmonics above an acceptable level. But I don’t think that’s your case. You could put your fan hub on a bubble balancer for a rough check though.

ok I will do that, easy enough to check I got a balancer just sitting there doing nothing.

Ok, but I’m not saying that will be very accurate. It really should be dynamically checked, spun up to operating speed. Just like we balance tires.

yeah fan is plastic and only about 14 inch’s so I could not see any movement with the bubble. I guess if it was reallllly off it would have shown bubble movement ,the idea was good though. That pump was a 2005 so will just say it was due.

It’s funny that Ford Model A coolant pump shafts are still going strong, and they turn about the same speed. It’s not age related. Just food for thought.

you know something  that pump had no weep hole, so that early sign of seal failure and bearing  demise  <span style=”display: inline !important; float: none; background-color: #ffffff; color: #333333; font-family: Georgia,’Times New Roman’,’Bitstream Charter’,Times,serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;”>coming </span>is not there. is this common now?

What the hell did you do? That gave me a headache! Hahahahaha!

I don’t know if weep holes are still used in what applications, but my ’08 Powerstroke coolant pump has one, they are used on 3400 series Cat engines, and 567, 645, and 710 series EMD engines.

I do not have a clue what causes that , course I am kinda computer stupid. with that said, a new pump came in and it did not have a weep hole either, but it fit perfect so it has been installed. just waiting for the radiator to be repaired, luckily I found a guy that still can repair one. a new one  with this dong feng  part # 200.00.032  has been hard to find.

The old radiator repair shops are all but gone. All the new stuff is plastic and aluminum.