Go Bottomfill points on long 310 for trans and hydraulic system
 | cjgtlg
Join Date: Feb 2016 Posts: 4 florida 
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2016-02-05 194450
working on a tractor that we inherited with no service manual.
Found the dipstick at shifter that might be trans system, but where to fill and can't find the same for hydraulic.
3 point won't come up at all. certain that system needs fluid.
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Add Photofill points on long 310 for trans and hydraulic system
 | Murf
Join Date: Dec 1999 Posts: 7249 Toronto Area, Ontario, Canada 
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2016-02-05 194451
First off, you don't mention if the level is low on that dipstick. If it's low but still showing on the dipstick then that's not the issue.
If it's not that, there's usually a knob under the seat, between your feet as sitting on the tractor, it adjusts the speed at which the 3pth drops, if it is closed all the way, the 3pth will be frozen in place.
Finally, the transmission and differential share one large common sump which is also the reservoir for the hydraulic system.
Best of luck. ....
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Add Photofill points on long 310 for trans and hydraulic system
| cjgtlg
Join Date: Feb 2016 Posts: 4 florida
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2016-02-05 194452
thanks murf for the reply.
stick was dry ,what point should be used to refill.
under the trans there is a drain plug to drop out but can't see where to fill up except for dip stick.
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Add Photofill points on long 310 for trans and hydraulic system
| bugs46
Join Date: Mar 2013 Posts: 36 Tennessee
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2016-02-05 194453
Long 310 - transmission
Go to www.Tractordata.com and it will tell you most anything you need to know about a 310 Long Tractor or any other make.
Long 310 tractor photo
1980 - 1990
Utility tractor
more Long 310 specifications...
Overview
Engine
Transmission
Dimensions
Photos
Transmission:
Type: sliding gear/constant mesh
Gears: 6 forward and 2 reverse
Clutch: dry disc
Oil capacity: 17 qts [16.1 L]
Oil type:
LONG Multi-Purpose Tractor Fluid
Gears 2-3 and 5-6 are synchronize ....
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Add Photofill points on long 310 for trans and hydraulic system
 | kthompson
Join Date: Oct 2005 Posts: 5278 South Carolina
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2016-02-05 194454
cj my brothers has a larger Long than your's but 99% sure you will find a large pipe plug on top of the housing near the seat.
If the design of this tractor is as his while you are at it be sure you drain the transmission and watch for WATER, if you see any would suggest you flush the system before putting in good oil. Also do not skip the filer.
There may be a knob on it as Murf mentioned but there may be a lever on the side of the transmission.
I would not run the engine with oil not touching the dip stick. kt
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Add Photofill points on long 310 for trans and hydraulic system
| Carolinablue
Join Date: Feb 2015 Posts: 28 NC
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2016-02-05 194455
Either plug on top of the trans. will do for filling. I use the one closest to the shifter as it seems easy to get to for me. ....
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Add Photofill points on long 310 for trans and hydraulic system
| Imfedup
Join Date: Dec 2015 Posts: 60 Central Kentucky
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2016-02-05 194456
No mention yet of a suction screen. Look for a canister in the hydraulic pump suction tube. It will have a flange on the back side with two bolts. This screen should be checked/cleaned if you're having hydraulic issues. ....
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Add Photofill points on long 310 for trans and hydraulic system
| cjgtlg
Join Date: Feb 2016 Posts: 4 florida
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2016-02-05 194458
had changed engine oil, checked tank at fuel pump suction for water, installed a new battery ,then primed the system at furthest cylinder and she starts great.
thanks so much for intel we have a good start I think, just have too take my time and look it over more closely.
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Add Photofill points on long 310 for trans and hydraulic system
| arcwelder
Join Date: Mar 2014 Posts: 111 Florida
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2016-02-08 194500
Long tractors are all very similar.
this manual probably has the information you are looking for.
Service manual for Long 360-460-510 series in pdf.
Should be very similar to 310 in nature.
Not too sure but this is available here (link)
http://tractorpoint.com/pdf/Long%20Service%20Manual%20for%20360-460-510%20series.pdf
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Link: Long 360 - 510 Manual
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Add Photofill points on long 310 for trans and hydraulic system
| RockTx
Join Date: Jun 2025 Posts: 1 Conroe Texas
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2025-06-29 201897
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Quote:
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Sorry I know this is a super old post . But I just picked up a 510 long and was going to shoot you a pm because it sounded like you could help me sir. I am going to try to change the trans oil because it is milky and I cannot have that( still runs great and all but the lift) so I figure it is clogged up. But I cannot figure out how to get to the filter. From what I have read it is under the seat. I have looked Not seeing how it could be under there. I think the tractor is one of the ones made in the early 80's in Romania.
Thanks for for any help !
Rock
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