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D8H46A help identifying pump and its purpose?

D8H46A help identifying pump and its purpose?

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Medic235
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Plowing snow today I blew a hose and had a loss of drive .. I've looked through the parts manual and spoke with finning direct and we are stumped the hose I blew goes from what looks like a pump at the top of the torque converter housing to a oil filter under the left foot floor plate the second hose that is nearing end of life goes from the filter to the top front of transmission ??? Yes I can take the hoses to finnings hose shop but the reason they blew is because of the poor routing the hoses looked newish
Was hoping to find factory replacement .
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Wed, Jan 6, 2021 7:27 AM
Rome K/G
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Pump looks like the torque divider and recirculating scavenge pump.
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Wed, Jan 6, 2021 8:47 AM
Medic235
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Reply to Rome K/G:
Pump looks like the torque divider and recirculating scavenge pump.
That is at the bottom of the transmission is it not this at the very top on the torque converter side
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Wed, Jan 6, 2021 8:51 AM
edb
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Hi Medic235,
as ever a Serial Number would help further but for very early 46A's the Transmission pump is mounted at the top left corner of the rear face of the main Torque Conv. housing.
First units had a vane pump that was never long lasting due to drive train contaminants wearing the fine tolerance vanes etc. out.
Next evolution was a gear pump in the same location and later still a larger Steering pump (mounted on front right side of Accessory drive housing near the flywheel housing upper in front of the floor plates) was utilised with a change of pipe work layout.
Cheers,
Eddie B.
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Wed, Jan 6, 2021 8:59 AM
edb
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Reply to edb:
Hi Medic235,
as ever a Serial Number would help further but for very early 46A's the Transmission pump is mounted at the top left corner of the rear face of the main Torque Conv. housing.
First units had a vane pump that was never long lasting due to drive train contaminants wearing the fine tolerance vanes etc. out.
Next evolution was a gear pump in the same location and later still a larger Steering pump (mounted on front right side of Accessory drive housing near the flywheel housing upper in front of the floor plates) was utilised with a change of pipe work layout.
Cheers,
Eddie B.
Hi Team,
OK more dialogue whilst I was looking in books and posting.
If the pump is at the bottom centre of the rear face of the T/C housing it will be the T/C Scavenge pump to return oil leaked from the T/C and lube supplied to the Torque Diver planetary gear set back to the reservoir under the steer clutches etc. in the main rear case.

Cheers,
Eddie B.
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Wed, Jan 6, 2021 9:05 AM
Medic235
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Reply to edb:
Hi Team,
OK more dialogue whilst I was looking in books and posting.
If the pump is at the bottom centre of the rear face of the T/C housing it will be the T/C Scavenge pump to return oil leaked from the T/C and lube supplied to the Torque Diver planetary gear set back to the reservoir under the steer clutches etc. in the main rear case.

Cheers,
Eddie B.
Sorry gang serial number is 17778 the pump is while sitting in the machine the filter the pump hoses go into is under the left foot and the pump is center top of torque converter . I also have the pump on the front right of the rear of engine . Finning is unable to locate the parts nor can I in both hard manuals I have
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Wed, Jan 6, 2021 9:18 AM
Medic235
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Possible this has both pumps ?
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Wed, Jan 6, 2021 9:29 AM
Rome K/G
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Reply to Medic235:
Possible this has both pumps ?
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Second pic is the transmission and steering clutch hyd pump
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Wed, Jan 6, 2021 9:38 AM
Old Magnet
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Reply to Rome K/G:
Second pic is the transmission and steering clutch hyd pump
Would help if you provided tractor s/n but units with filter under left floorboard would be prior to 46A10725.
Hose from pump to filter is a 1S0030, hose from filter to trans is a 7M5124.
Pump is a 7M6621 gear pump, part of transmission lubrication system.
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Wed, Jan 6, 2021 10:09 AM
Medic235
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Reply to Old Magnet:
Would help if you provided tractor s/n but units with filter under left floorboard would be prior to 46A10725.
Hose from pump to filter is a 1S0030, hose from filter to trans is a 7M5124.
Pump is a 7M6621 gear pump, part of transmission lubrication system.
The serial number we have 46A17778
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Wed, Jan 6, 2021 10:17 AM
Old Magnet
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Reply to Medic235:
The serial number we have 46A17778
Where are you getting that s/n? That's not the arrangement you have.
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Wed, Jan 6, 2021 10:28 AM
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