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Hd6 wet clutch pump
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gemdozer View Drop Down
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Joined: 17 Sep 2009
Points: 1131 		Post Options Post Options   Thanks (0) Thanks(0)   Quote gemdozer Quote  Post ReplyReply Direct Link To This Post Posted: 23 Apr 2026 at 4:48pm
I recheck today and have oil pump and part number is 623316 and she is 7\16 inch longer .
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Primos75 View Drop Down
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Joined: 08 Aug 2022
Location: North carolina
Points: 44 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Primos75 Quote  Post ReplyReply Direct Link To This Post Posted: 23 Apr 2026 at 6:42pm
I wonder what the difference is on that one? Does it have more then 2 ports? Wonder why it's longer.
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Primos75 View Drop Down
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Joined: 08 Aug 2022
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Points: 44 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Primos75 Quote  Post ReplyReply Direct Link To This Post Posted: 23 Apr 2026 at 7:05pm
That part number i think is from a m45 motor grader. At least that's were i found it. Whether or not it would work i have no clue.
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gemdozer View Drop Down
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Joined: 17 Sep 2009
Points: 1131 		Post Options Post Options   Thanks (0) Thanks(0)   Quote gemdozer Quote  Post ReplyReply Direct Link To This Post Posted: 23 Apr 2026 at 7:59pm
This pump came from HD11 dozer and have 2 hole for oil. 1 in front and 1 on side and look 3\4 inch hole and I open and loog very good condition
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Ian Beale View Drop Down
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Joined: 03 Oct 2011
Location: New South Wales
Points: 1020 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ian Beale Quote  Post ReplyReply Direct Link To This Post Posted: 23 Apr 2026 at 9:09pm
Re "That part number i think is from a m45 motor grader"

I'm not near our AC Forty Five grader or the books 

IIRC the only hydraulic pump on them was for power steering.

I might get a chance to look tomorrow.

Incidentally Australian versions of that grader had model number "524/****" and the pump was Hydreco
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Les Kerf View Drop Down
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Joined: 08 May 2020
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Points: 1891 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Les Kerf Quote  Post ReplyReply Direct Link To This Post Posted: 24 Apr 2026 at 10:07am
Originally posted by HD6 Merv HD6 Merv wrote:

...
Master clutch oil pump is only a circulating lube pump. And oil pressure is only around 20 psi.  I know this because ive seen some late 40M series HD6 that had a clutch pressure gauge fitted in the dash...

Apparently I misunderstood the function of the pump; it really doesn't assist in actuating the clutch, but rather is only to facilitate circulating the oil for the purpose of filtering and as an aid to cooling?
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Primos75 View Drop Down
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Points: 44 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Primos75 Quote  Post ReplyReply Direct Link To This Post Posted: 24 Apr 2026 at 11:45am
That sounds about right from what I gather. Lubes the clutch plates and circulates through the filter.
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