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John Deere 310sk

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Jhernandez940

Member
Joined
Dec 29, 2023
Messages
23
Location
Midland,Texas
I’m having problems with the service brakes on my 310sk. The parking brake button seems to be working but the service brakes seem to be constantly grabbing. I have to push on the accelerator peda to get the wheels to move. It’s as if the brakes are applied l. Need some ideas as to where to look
 
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Diesel Dave

Senior Member
Joined
Sep 29, 2022
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1,452
Location
Ontario Canada
Sounds like an issue with the brake valve or sticking brake pedals.
Do the brake pedals return to their normal at rest position?
Try lifting up on the pedals.
 
D

Diesel Dave

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Sep 29, 2022
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1,452
Location
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Loosen the brake bleeder screws on both rear axles to temporarily relieve any possible residual service brake pressure. See if the rear wheels are able to turn.
 
J

Jhernandez940

Member
Joined
Dec 29, 2023
Messages
23
Location
Midland,Texas
There’s no fluid coming out of either left or right Brake lines with the backhoe on or off. I also noticed when I revés the engine up the driveshaft spins faster but the wheel still turns really slow
 
mg2361

mg2361

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Jul 5, 2016
Messages
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Location
Pennsylvania
Occupation
Equipment Mechanic
Jhernandez940 said:
There’s no fluid coming out of either left or right Brake lines with the backhoe on or off.
Click to expand...
When brake pedals are NOT applied, there should always be a steady trickle of oil coming out of the brake lines, or the bleeders, indicating a path back to the brake reservoir so the brakes can release.
 
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Jhernandez940

Member
Joined
Dec 29, 2023
Messages
23
Location
Midland,Texas
I can’t move the backhoe. Something causing the differential from moving if I don’t press the accelerator. I bought a hydraulic test kit. None of the lines from the transmission to brake valve are getting any pressure
 
mg2361

mg2361

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Whether there is pressure "TO" the brake valve or not, that won't cause your issue of not moving. With that being said, no oil pressure is probably due to a plugged orifice. That would be the orificed tee fitting coming out of the back of the transmission that supplies the brake valve with pressure. Or, it could be caused by a lack of transmission pressure.

Since you have no pressure to the brake valve, has the transmission pressure been checked? Park brake pressure? Transmission oil level good (checked with the engine idling)?

Jhernandez940 said:
What could be causing the oil not to come out brake lines?
Click to expand...
I answered that one in post #15 and still question as to why there is no flow with the pedals in the "unapplied" position. Unless the brake valve reservoir is empty (which is unlikely).
 
Last edited:
J

Jhernandez940

Member
Joined
Dec 29, 2023
Messages
23
Location
Midland,Texas
Parking brake pressure is at 250psi. I’m going to take off the tee your talking about today. What psi should the brake valve be getting. It has 5 hoses going to iWhich one is the supply and return. Also where is the transmission pressure checked at
 
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