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Cat e 140
- Thread starter nobbie
- Start date
Unsure what its called but when you move a lever it senses and pressures up on demand.
you set a small screw to a desired length and then a larger screw for pressure but you need to stall a cyl out to get max pressure then adjust.
The track that the pump ran was a bit sticky as in it wouldnt run until the other track started and if you moved slowly it would take off but if you dumped the track levers quick the track would freewheel but not drive
it was like the second or high speed worked fine once you got to it but the low speed on that track was faulty
you set a small screw to a desired length and then a larger screw for pressure but you need to stall a cyl out to get max pressure then adjust.
The track that the pump ran was a bit sticky as in it wouldnt run until the other track started and if you moved slowly it would take off but if you dumped the track levers quick the track would freewheel but not drive
it was like the second or high speed worked fine once you got to it but the low speed on that track was faulty
Early rexroths load sense were the same but often hard on start up so often a timer type solenoid or soft start they called it was added
they had a standby pressure of around 15 bar and top pressure around 200 bar and the standby was simply a flow precharge i guess you would call it
they had a standby pressure of around 15 bar and top pressure around 200 bar and the standby was simply a flow precharge i guess you would call it
If pump needs a stand by pressure - than it’s working with closed center system and it is negcon LS, and have to have negcon control lines from each side of control valve to a pump regulator. The only LS system that I know that don’t have any control hydraulic lines is computer controled ( through solenoids) PD or delta P open center system.
If it is a negcon and someone removed and plugged the control lines your pumps ran full flow all the time, which should have bogged down your engine if the pressure was set right.
Or maybe I’m just don’t know something!
If it is a negcon and someone removed and plugged the control lines your pumps ran full flow all the time, which should have bogged down your engine if the pressure was set right.
Or maybe I’m just don’t know something!
No worries
I am not sure what the technical name of the system is i just set the regualtors on top the pumps as the cat manual stated.
All the piston slippers disintegrated and the piston guide is in little bits so when fully apart i hope to be able to diagnose what went wrong.
On assembly i blew the oil holes through the pistons to check,i spent a lot of time getting the axial play within specs and the swash plate cradle also required shimming so maybe its simply faulty parts.
I will come back when i know more
I am not sure what the technical name of the system is i just set the regualtors on top the pumps as the cat manual stated.
All the piston slippers disintegrated and the piston guide is in little bits so when fully apart i hope to be able to diagnose what went wrong.
On assembly i blew the oil holes through the pistons to check,i spent a lot of time getting the axial play within specs and the swash plate cradle also required shimming so maybe its simply faulty parts.
I will come back when i know more
Ok i probably fitted succesfully more piston pumps than you.
It was bled and filled properly.
Pistons slippers will unseat and cause problems if there is excessive case drain pressure this looks like a busted piston spacer that went through the bottom end of pump and then dislocated slippers.
It was bled and filled properly.
Pistons slippers will unseat and cause problems if there is excessive case drain pressure this looks like a busted piston spacer that went through the bottom end of pump and then dislocated slippers.