The Dirt Guy
Well-Known Member
Equipment: 2003 John Deere 160CLC.
History: I replaced the engine with a used one, machine worked fine and noticed my boom up slowed way down and at the same time I had an oil pan gasket leaking (must have torn it when I installed it). I replaced the arm regenerative solenoid and went to work; it corrected the boom speed, and I was able to continue on. I then decided to have Deere come and change the oil pan gasket and install engine wiring harness since the current one was in bad shape. Once they left, I ran the machine for approximately 3hrs before I noticed no arm in power and functions were operating slowly. Arm in function blew a line from the control stick, replaced it and called Deere again. Deere stated that they adjusted the main relief and replaced some O-rings. Went to pick it up and it started and ran fine so I loaded it up and brought it home, ran it for 3-5hrs and all functions went slow and no power Hydraulic wise (everything operated very slow). When the bucket teeth were in the ground it would not even scratch the soil. I contacted another local mechanic and we found the main relief would not adjust so I bought a new one verified the pressure was at the desired level approximately 5000 psi on the display control, I then assumed great so I decided to run it, it ran for 1-2hrs before reverting back to the old way of slowing everything down all functions and no hydraulic power again, engine rpm stayed normal 2010rpm ( I know this is slightly low according to spec but this is what it has been the whole time). I then decided to look at a gauge installed on the pilot manifold and at low idle it was reading 0psi and at high idle it was at 325-400psi. this was unusual since it had normally been at 500psi regardless of the idle speed when the machine was operating normally.
Issue: Hydraulic issues, pumps 1 and 2 will display approximately 5000 psi and suddenly drop to 2700 psi and all function will reduce in power. Pilot pressure at full throttle is approximately 325-400psi and at idle 0psi. No codes on display or pump controller under the back console. Also, while checking the boom up and arm in pressure displacement for pumps 1 & 2, the function will drift on occasion which had never happened before (drift does not occur every time).
Items replaced: 4045T engine (used), engine wiring harness, pump 1 & 2 pressure sensor, arm regenerative solenoid, main relief valve, boom up pressure sensor, arm in pressure sensor, crankshaft speed sensor, hydraulic pump speed sensor, verified all voltage reading on all sensors on the pump were within the spec. Arm in, boom up, and another line relief was removed and cleaned and packing and O-rings replaced then reinstalled. (John Deere stated the main pump was good when I took it to the shop).
Need help addressing, thank you in advance for the input.
History: I replaced the engine with a used one, machine worked fine and noticed my boom up slowed way down and at the same time I had an oil pan gasket leaking (must have torn it when I installed it). I replaced the arm regenerative solenoid and went to work; it corrected the boom speed, and I was able to continue on. I then decided to have Deere come and change the oil pan gasket and install engine wiring harness since the current one was in bad shape. Once they left, I ran the machine for approximately 3hrs before I noticed no arm in power and functions were operating slowly. Arm in function blew a line from the control stick, replaced it and called Deere again. Deere stated that they adjusted the main relief and replaced some O-rings. Went to pick it up and it started and ran fine so I loaded it up and brought it home, ran it for 3-5hrs and all functions went slow and no power Hydraulic wise (everything operated very slow). When the bucket teeth were in the ground it would not even scratch the soil. I contacted another local mechanic and we found the main relief would not adjust so I bought a new one verified the pressure was at the desired level approximately 5000 psi on the display control, I then assumed great so I decided to run it, it ran for 1-2hrs before reverting back to the old way of slowing everything down all functions and no hydraulic power again, engine rpm stayed normal 2010rpm ( I know this is slightly low according to spec but this is what it has been the whole time). I then decided to look at a gauge installed on the pilot manifold and at low idle it was reading 0psi and at high idle it was at 325-400psi. this was unusual since it had normally been at 500psi regardless of the idle speed when the machine was operating normally.
Issue: Hydraulic issues, pumps 1 and 2 will display approximately 5000 psi and suddenly drop to 2700 psi and all function will reduce in power. Pilot pressure at full throttle is approximately 325-400psi and at idle 0psi. No codes on display or pump controller under the back console. Also, while checking the boom up and arm in pressure displacement for pumps 1 & 2, the function will drift on occasion which had never happened before (drift does not occur every time).
Items replaced: 4045T engine (used), engine wiring harness, pump 1 & 2 pressure sensor, arm regenerative solenoid, main relief valve, boom up pressure sensor, arm in pressure sensor, crankshaft speed sensor, hydraulic pump speed sensor, verified all voltage reading on all sensors on the pump were within the spec. Arm in, boom up, and another line relief was removed and cleaned and packing and O-rings replaced then reinstalled. (John Deere stated the main pump was good when I took it to the shop).
Need help addressing, thank you in advance for the input.