Massey 135 UK hydraulic external settings

Oilman galen · Jul 17, 2017

1970-71 135 U.K. With pressure control. Trying to set high pressure on hydraulic pump. Manual unclear. Position control in transport, draft in dwn position, wedge holding dashpot out...? Once high pressure is set by adjustable wheel do u rotate position control quadrant to stop pump action. What is process for obtaining regulated pressure and not being in constant pumping once u have reached max pressure setting? Can anyone help??
Someone said 135 didn't have pressure control but that lift cover from a larger tractor would fit 135..not sure

I have 900 pound weight on lower links and when arms raise with pressure it seems like something might break once they make it to end of travel. What kind of top stop is there? Just check chains? What are length of chains to be?

DavidP, South Wales · Jul 18, 2017

Hello Galen,
In the UK Pressure Control was available on the 135 as an option from
introduction in 1964 up to the upgrade in late 1970. PC then became
standard.
To adjust the PC and make final adjustment proceed as follows;
Centralize the inner quadrant in the slotted holes.
Draft lever UP, Position lever fully down in the PC quadrant.
Prior to fitting the cover; Adjust distance between adjuster and PC
body face to 1 5/16"

With wedge inserted;
Draft lever down. Position control lever in Transport.
Screw in lower knurled screw until 3-point has risen and relief valve
blows off. Scribe line across edge of lift cover and on to lift arm.
Scribe two further lines on the cover at distance of 1/2" and 5/8"
from first lines. With the oil at least warm screw out lower knurled
screw until the linkage takes 5 seconds to pass between the second
and third lines. Stop engine, raise Draft lever and remove wedge.

Move the adjustable stop to Constant Pumping. Move the Position
Control lever up against it in the Transport position. Slacken the
quadrant bolts and adjust until the original scribed lines are 1/16"
to 1/8" apart. Retighten.

Draft lever up and Position control lever in Constant Pumping.
With 4000psi gauge fitted screw in upper knurled screw until gauge
needle and pump control valve arm fluctuate from side to side. Screw
out knurled nut until needle and lever are steady and as little oil
as possible exits from the rear of the diaphragm housing.

For a 135 the pressure reading should be 2350psi for early tractors
or 2550psi for later ones.
Draft lever UP, Position Control lever in Constant Pumping.
If you need to correct this the Pressure Control adjuster should be
turned accordingly. It is easier to adjust if you lower the Position
Control lever fully in the Pressure Control quadrant and then return
to Constant Pumping to check the pressure. Doing this releases the
spring pressure.

Let us know how you get on.

DavidP, South Wales

Oilman galen · Jul 18, 2017

(quoted from post at 05:19:56 07/18/17) Hello Galen,
In the UK Pressure Control was available on the 135 as an option from
introduction in 1964 up to the upgrade in late 1970. PC then became
standard.
To adjust the PC and make final adjustment proceed as follows;
Centralize the inner quadrant in the slotted holes.
Draft lever UP, Position lever fully down in the PC quadrant.
Prior to fitting the cover; Adjust distance between adjuster and PC
body face to 1 5/16"

With wedge inserted;
Draft lever down. Position control lever in Transport.
Screw in lower knurled screw until 3-point has risen and relief valve
blows off. Scribe line across edge of lift cover and on to lift arm.
Scribe two further lines on the cover at distance of 1/2" and 5/8"
from first lines. With the oil at least warm screw out lower knurled
screw until the linkage takes 5 seconds to pass between the second
and third lines. Stop engine, raise Draft lever and remove wedge.

Move the adjustable stop to Constant Pumping. Move the Position
Control lever up against it in the Transport position. Slacken the
quadrant bolts and adjust until the original scribed lines are 1/16"
to 1/8" apart. Retighten.

Draft lever up and Position control lever in Constant Pumping.
With 4000psi gauge fitted screw in upper knurled screw until gauge
needle and pump control valve arm fluctuate from side to side. Screw
out knurled nut until needle and lever are steady and as little oil
as possible exits from the rear of the diaphragm housing.

For a 135 the pressure reading should be 2350psi for early tractors
or 2550psi for later ones.
Draft lever UP, Position Control lever in Constant Pumping.
If you need to correct this the Pressure Control adjuster should be
turned accordingly. It is easier to adjust if you lower the Position
Control lever fully in the Pressure Control quadrant and then return
to Constant Pumping to check the pressure. Doing this releases the
spring pressure.

Let us know how you get on.

DavidP, South Wales

Thank you for reply.
What is chance of breaking components if pc psi is initially too high? (I've turned star wheel from original 1 5/16" setting) When bottom arms get to top of travel n pressure has not risen to blow off on relief, chk chains Strt to hold arms and ram continues to lift, lower arms begin to bow. This happens around 1500 psi. If chains were longer will something stop ram internally or will it break parts?

DavidP, South Wales · Jul 21, 2017

Hello, just picked up your reply.
Breakages have happened in the past but that is due to mis-fortune or
error. As long as the adjustment procedure is followed accurately
there should be no problem. If the check chains are tight they should
be disconnected to allow the 3-point its full travel.

DavidP

Oilman galen · Jul 21, 2017

(quoted from post at 05:23:37 07/21/17) Hello, just picked up your reply.
Breakages have happened in the past but that is due to mis-fortune or
error. As long as the adjustment procedure is followed accurately
there should be no problem. If the check chains are tight they should
be disconnected to allow the 3-point its full travel.

DavidP

thanks for insight.
I made adjustments per instructions. My quadrant markings must be a little off when adjusting off the constant pumping setting so I used my gauge to get setting. Not getting any change when setting response control. When piering through adjustment hole and changing lever there is not hardly any movement of plunger adjustment rod, therefore no change in lower link fall from fast to slow.
I did notice after test driving that my arms would creep up after a while...must have something out of synch a little.
I hear a ping sound after engine off sounds like pressure relief ball. When it happens gauge will dip/ spike towards higher pressure then hold again( total swing not much) it seems to happen even at lower pressures though pressure control stays in same position. I'm getting 2550# at 600 rpm while running.

Massey 135 UK hydraulic external settings

Oilman galen

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DavidP, South Wales

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Oilman galen

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DavidP, South Wales

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Oilman galen

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