Foam in hydraulic fluid.

   #1  

onetexan

New member
Joined
Jun 25, 2017
Messages
9
Location
Roanoke, texas
Tractor
Bolens G152
I HAVE FOAM IN MY HYDRAULIC FLUID. I PUT 80-90 IN IT. THE THREE POINT HITCH DOESEN'T START GOING UP TILL THE HANDLE IS PULLED ALMOST TO THE TOP. THE TRACTOR IS A BOLENS ISEKI. THE TRANS AND HYDRAULIC FLUID IS THE SAME.
 

Attachments

  • tractor copy.png
    tractor copy.png
    3.7 MB · Views: 36
   #2  

Dave M7040

Elite Member
Joined
Dec 10, 2012
Messages
2,628
Location
Williamstown Ontario Canada
Tractor
Kubota M7040 Nuffield 465
I HAVE FOAM IN MY HYDRAULIC FLUID. I PUT 80-90 IN IT. THE THREE POINT HITCH DOESEN'T START GOING UP TILL THE HANDLE IS PULLED ALMOST TO THE TOP. THE TRACTOR IS A BOLENS ISEKI. THE TRANS AND HYDRAULIC FLUID IS THE SAME.
Typically cause of foamy oil is a leak on the suction side of the hydraulic pump letting air enter the pump.

Look for a piece of rubber hose on the suction line. Often used to join two pipes together. It will leak air in but you wont see fluid leaking out.

Dave M7040
 
   #3  

the old grind

Elite Member
Joined
Jul 21, 2012
Messages
3,883
Location
Mid-Michigan
Tractor
NH T-1520 HST, NH TC33DA HST, Case DX26 HST, .Terramite T5C, . NH L785
Is 80-90 called out for hydro fluid? Many machines that don't spec ISO 46 hydro spec 15w40 diesel engine oil. I can imagine something too heavy cavitating when cold.
 
   #4  

Roadworthy

Veteran Member
Joined
Aug 24, 2019
Messages
1,739
Location
Southeast Washington
Tractor
Kubota L2501 HST,
80W-90 is pretty common in cars for transmission fluid for a stick shift or for a rear differential. I think you should check the manual to determine the proper transmission - hydraulic fluid for your tractor. They frequently use a general purpose fluid for systems with a shared reservoir.
 
  
  • Thread Starter
#5  
OP
O

onetexan

New member
Joined
Jun 25, 2017
Messages
9
Location
Roanoke, texas
Tractor
Bolens G152
I created this post . My manual says to use 80W gear oil. It operates the trans and hydraulic pto . I have a 1982 to 1990 Bolens tractor. I plan to clean the suction strainer or filter. I have to find out if I need a new one or if I can just clean the one I have.
 
   #6  

Texasmark

Elite Member
Joined
Apr 24, 2012
Messages
3,256
Location
N. Texas
Tractor
Ford: '88 3910 Series II, '65 3000; '07 6530C Branson with FEL, 2020 LS MT225S. All Diesels
Hydraulic fluid is in the range of 15-20 Wt for pumpability reasons. Additives allow it to have a high pressure retention capability. On tractors using 85 to 140 mineral oil in the differential, they have a separate compartment for the tranny which can use it and one for the hydraulics which use HYDRAULIC FLUID, OR TRANS-HYDRAULIC-DIFFERENTIAL FLUID (THD oil), all being in the viscosity range I stated if you have a newer tractor with a common sump feeding all 3 functions. You mentioned that your hydraulics don't want to work and produce foam....... put the proper oil in the hydraulics and life will get better for you!
 
   #7  

Topzide

Silver Member
Joined
Jan 11, 2012
Messages
192
Location
Southern MD
Tractor
Iseki 2140 & 2160
In the O/M for my 1502 and 1704, it calls for a high quality low viscosity gear - hydraulic oil such as Bolens 1738157 or equivalent. I've been using an ISO-46 oil for 10+ years with no problems! 80-90 is a gear oil for front axle on 4wd not the hydraulic system of a small tractor!
 
   #8  

the old grind

Elite Member
Joined
Jul 21, 2012
Messages
3,883
Location
Mid-Michigan
Tractor
NH T-1520 HST, NH TC33DA HST, Case DX26 HST, .Terramite T5C, . NH L785
I was thinking ISO 68 might be ok but not sure. What I am sure of is that I'd want to warm up the hydro a lot esp in cold weather. When 'plowing' snow this Winter at 15 F it dawned on me to cover the hydro oil cooler. I like to see snow melting on the loader cyls to be sure my juice is warmed up enough.

Even 80w will flow like half & half when it's up to temp. 15w-40 will flow like milk at 180 F. This one is curious, and I wonder if a filter substitution could inhibit cold flow, esp if 80w is called out by the maker. I'd be particular about that item & it's specs. WIMI I wonder what micron a 'factory' would be rated at.
 
  
  • Thread Starter
#9  
OP
O

onetexan

New member
Joined
Jun 25, 2017
Messages
9
Location
Roanoke, texas
Tractor
Bolens G152
In the O/M for my 1502 and 1704, it calls for a high quality low viscosity gear - hydraulic oil such as Bolens 1738157 or equivalent. I've been using an ISO-46 oil for 10+ years with no problems! 80-90 is a gear oil for front axle on 4wd not the hydraulic system of a small tractor!
Where can I buy Bolens 1738157 oil? I don't think I could use engine oil in it. The oil or goes in the trans and it operates the hydraulic pto shaft for the rotto tiller. Thanks
 

Topzide

Silver Member
Joined
Jan 11, 2012
Messages
192
Location
Southern MD
Tractor
Iseki 2140 & 2160
That's the reference for a current oil. Same as Mobil 423 oil. And yes that's been discontinued also. Your local NAPA or Tractor Supply can get you what you need. At Tractor Supply you can use Travellers Premium Tractor Hydraulic fluid and be fine. Have used that in mine and have over a 1000 hrs on 1 and 500 hrs on other with that oil.
 
 
Top