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- RD4 Diesel lift pump leaking on input shaft
RD4 Diesel lift pump leaking on input shaft
16 years 3 months ago #13123
by R4pat
Pat Bayer
1938 R4 Caterpillar,1937 RD4 Caterpillar,1938 RD4 Caterpillar,1942 D4 Caterpillar, 1930 30, Gas 50
RD4 Diesel lift pump leaking on input shaft was created by R4pat
I was wondering what the lift pump on an RD4 was supposed to have for a seal. Looks like graphite packing, last I checked Cat doesn't carry a seal for it any more, here are some pictures of a scrapped out pump of mine,
Pat Bayer
1938 R4 Caterpillar,1937 RD4 Caterpillar,1938 RD4 Caterpillar,1942 D4 Caterpillar, 1930 30, Gas 50
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- Old Magnet
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16 years 3 months ago #13125
by Old Magnet
Replied by Old Magnet on topic RD4 Diesel lift pump leaking on input shaft
They went through a couple style pumps and seal arrangements. Looks like you will have to make do or move up to the next style pump from sr. #4G9568 to 7J635 that used a different double seal. I believe all of them were a graphite packing.
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16 years 3 months ago #13127
by R4pat
Pat Bayer
1938 R4 Caterpillar,1937 RD4 Caterpillar,1938 RD4 Caterpillar,1942 D4 Caterpillar, 1930 30, Gas 50
Replied by R4pat on topic RD4 Diesel lift pump leaking on input shaft
Old Magnet, do you mean get a different pump or do you mean the the seals for the 4G9568-7J635 will work in my pump
Pat Bayer
1938 R4 Caterpillar,1937 RD4 Caterpillar,1938 RD4 Caterpillar,1942 D4 Caterpillar, 1930 30, Gas 50
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16 years 3 months ago #13128
by Old Magnet
Replied by Old Magnet on topic RD4 Diesel lift pump leaking on input shaft
That's a different pump.....still similar style....but uses different double seals and from what I can make out from the parts book the seal related parts are different dimensions and they are different part numbers.
May not get you out of the woods until parts availability was checked also.
May not get you out of the woods until parts availability was checked also.
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16 years 3 months ago #13134
by R4pat
Pat Bayer
1938 R4 Caterpillar,1937 RD4 Caterpillar,1938 RD4 Caterpillar,1942 D4 Caterpillar, 1930 30, Gas 50
Replied by R4pat on topic RD4 Diesel lift pump leaking on input shaft
Thanks Old Magnet, I think I will try making a new packings with some rope, and I will use a press to get that stuff packed tight, hopefully this will work, the old packing probably old, hard and drieded out, I appreciate your support
Pat Bayer
1938 R4 Caterpillar,1937 RD4 Caterpillar,1938 RD4 Caterpillar,1942 D4 Caterpillar, 1930 30, Gas 50
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16 years 3 months ago #13135
by R4pat
Pat Bayer
1938 R4 Caterpillar,1937 RD4 Caterpillar,1938 RD4 Caterpillar,1942 D4 Caterpillar, 1930 30, Gas 50
Replied by R4pat on topic RD4 Diesel lift pump leaking on input shaft
Thanks Old Magnet, I think I will try making a new packings with some rope, and I will use a press to get that stuff packed tight, hopefully this will work, the old packing probably old, hard and drieded out, I appreciate your support:)
Pat Bayer
1938 R4 Caterpillar,1937 RD4 Caterpillar,1938 RD4 Caterpillar,1942 D4 Caterpillar, 1930 30, Gas 50
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16 years 3 months ago #13144
by KidNV
Replied by KidNV on topic RD4 Diesel lift pump leaking on input shaft
Pat, those leaded seals should still be available, I bought 2 from cat, last yr or the one before. Like $4 a piece.
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16 years 3 months ago #13145
by R4pat
Pat Bayer
1938 R4 Caterpillar,1937 RD4 Caterpillar,1938 RD4 Caterpillar,1942 D4 Caterpillar, 1930 30, Gas 50
Replied by R4pat on topic RD4 Diesel lift pump leaking on input shaft
KidNV, would you happen to have a part #, it isn't a later style pump like Old Magnet was talking about is it?
Pat Bayer
1938 R4 Caterpillar,1937 RD4 Caterpillar,1938 RD4 Caterpillar,1942 D4 Caterpillar, 1930 30, Gas 50
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16 years 3 months ago #13149
by KidNV
Replied by KidNV on topic RD4 Diesel lift pump leaking on input shaft
Pat, was just lookin it up.. 2A831 changed to 4B9051, then 5M6038. Got them from Foley Cat in KS in 05, for $2.47 ea. Their # is 620-792-5246. Steve or Mike
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16 years 3 months ago #13154
by Old Magnet
Replied by Old Magnet on topic RD4 Diesel lift pump leaking on input shaft
KidNV,
Are you sure they are all the same seal?.....cause the spring, seat and retainer numbers all change to. Might be close enough to give you something to work with though....price is right.
Are you sure they are all the same seal?.....cause the spring, seat and retainer numbers all change to. Might be close enough to give you something to work with though....price is right.
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