74 JD 830 Hyd pump retrofit

[RottenGround]

Has anyone every changed the stock tandem open center pump to maybe one from Surplus Center they list several tandem style pumps as long as the pressure and flow is the same I myself dont see why we couldnt make it work Thanks again.

 

[J_J]

If the shaft size and type shaft, spline, key-way, etc, and the bolt holes align up, it might work.

 

[buickanddeere]

Just how much $$$ are you counting on saving ?

 

[RottenGround]

Thanks, does anyone by chance know the pressure and gpm of the stock pump i know one section is for the power steering the other for hydraulics. Can You buy rebuild kits for the factory pump and i have seen a reman pump for about 650.00. Not sure how much one from Surplus center is they start out at 100.00 or so I would like to find a reasonable factory pump. Does anyone have a factory AL24233 proofmeter for the 830 thanks again

 

[buickanddeere]

I suppose an aftermarket pump if carefully chosen would suffice. Going higher on the GPM and to a stronger better sealed higher pressure pump won't damage anything. It's the same relief valve setting.
Deere parts list. TxJim has figured out how to post images form the parts list, I haven't yet.

HYDRAULIC PUMP
(POWER STEERING PUMP)
11 CM3 (.67 IN.3)
Cart KEY PART NO. PART NAME QTY TRACTOR SERIAL NO. REMARKS
1 L29364 DRIVER 1
2 L29371 O-RING 1
3 L29366 SCREW 4
4 L29359 COVER 1 (SUB AL37750, AL36651, AL36652, AL36653, (2) 19H3241 AND (2) 12H293)
5 L24688 RING 2
6 L25367 SPACER 2 (SUB AL37750, AL36651, AL36652, AL36653, (2) 19H3241 AND (2) 12H293)
7 L25366 RING 4 (SUB AL25629)
8 L29362 PLUG 4 (NLA)
9 L29363 PLUG 4 (NLA)
10 L29360 PLUG 4 (NLA)
Cart KEY PART NO. PART NAME QTY TRACTOR SERIAL NO. REMARKS
11 L29361 PACKING 4 (SUB AL25629)
12 AL24191 KIT 1 (PART 2) (SUB AL37750, AL36651, AL36652, AL36653, (2) 19H3241 AND (2) 12H293)
13 L29368 LOCK WASHER 2
14 L29367 SCREW 2
15 L25368 PLUG 4 (SUB AL25629)
16 26M4222 SHAFT KEY 1 3 X 16 MM
17 L25365 RING 1
18 L29365 COVER 1 (SUB AL37750, AL36651, AL36652, AL36653, (2) 19H3241 AND (2) 12H293)
19 12H301 LOCK WASHER 1 1/2"
20 14M7155 NUT 1 M12
Cart KEY PART NO. PART NAME QTY TRACTOR SERIAL NO. REMARKS
21 AL24190 KIT 1 (PART 1) (SUB AL37750, AL36651, AL36652, AL36653, 19H3241 AND (2) 12H293)
.. AR55346 HYDRAULIC PUMP 1 (WITH POWER STEERING PUMP) (SUB AL37750, AL36651, AL36652, AL36653, (2) 19H3241 AND (2) 12H293)
.. AL25629 KIT 1 PACKING (PART 1)
.. AL25630 KIT 1 PACKING (PART 2)

 

[Tx Jim]

b&d
Posting parts photo is easy. right click on photo then click "save image as" then click on "go advanced" then click on "manage attachments" then click on "add files" then click on "select files" then choose photo out of downloads on "your computer" then click on "upload files" then "submit reply. It's usually true that a picture is worth a 1000 words.

 

[Tx Jim]

RottenGround
I think a big problem to installing a pump from Surplus Center would be getting an adapter to attach the hyd lines to the pump. Without the aid of a service manual I'd guess the pump output to be 10 GPM.

 

[RottenGround]

Would be better to go back with factory pump. My tractor loses hydraulics when u push the clutch all the way down which stops the transmission oil pump my manual says there is a supply bypass valve which is a check valve or sorts that is suppose to open due to negative pressure from the tranny oil pump stopping i can see the supply bypass valve when i drain my fluid and take my shifter housing off so i took and brazing rod and bent a hook and thought it was stuck and it was but i still lose hyd pressure at full clutch so i figure my main pump is wore out due age and what not but i can start the tractor without the shifter installed and let out on the clutch and u pump and little stream out of the front of the tranny oil pump is this normal? if it is not it could be sucking air there instead of pulling the from the supply bypass valve

 

[Tx Jim]

Have you changed hyd filter and checked/cleaned trans oil sump screen lately?????

 

[RottenGround]

I serviced it out completly i bought the tractor like it is the screen was pretty bad yhe filter wasnt to bad