Takeuchi TL130, Weak lift arms and bucket curl. Parts Cannon Loaded

azvacs · 2026-07-29T00:43:12.000Z

I have shot the parts cannon at this thing too many times. I got a set of gauges and checked pressure on P3 port. According to the manual, pressure should be 20.6MPa. That translates to 3000psi My gauge reads 1800psi at max RPM then as i hit the stops, the relief valve kicks in. I have rebuilt the gear pump but no real change. Can someone tell me what i think is correct. Too much wear in the gear pump and it needs to be replaced. What is the general consensus.?

Started by azvacsJul 29, 202623 replies

azvacsJunior MemberAug 5, 2026#21
heymccall said: Front half of gear pump assembly is pilot pressure pump. Rear half of gear pump is boom/ bucket/ auxiliary. Travel is via the big tandem variable displacement pump assembly (closest to flywheel). You resealed the gear pump? Did you replace the inner body number "3" shaped seals on the outer of each wear insert? View attachment 364053 Click to expand... yes, replaced with no change in performance..see last posting i made
Simon CSuper UserAug 5, 2026#22
azvacs said: OK, I built a test port fitting and put it directly off the gear pump on the line that goes to the relief valve body. i capped it and capped fitting going into valve body. I ran engine at max rpm and pump only developed 1100 psi. I dont know what other tests i could do. My determination is that i have a wrn out gear pump. Thoughts? Click to expand... My experience is that 3000 hours out of a gear pump is a fair amount, some have gotten more like 6000 hours but a lot depends on oil type, filter changes, oil changes and how often spools are over relief. Have seen piston pumps that were well serviced with 25000 hours, it depends on a lot of things. Not sure if I understood you propeerly, think you meant that you put a Tee at the pump discharge with the pump discharge going straight over to the control valve, and the one branch of the Tee with the gauge on it. The line to the control valve can never be plugged or the pump will grenade. I know a guy that did it twice until he found out you cannot do that. If no relief is stuck and suction filter is good as you have said it is pointing strongly to the pump, whether worn out or something assembled wrong. Simon C
azvacsJunior MemberAug 24, 2026#23
Mystery solved. It was a worn out gear pump. Back to full strength on lift arms and bucket curl after chasing this problem for more than a year. I just was throwing the wrong parts at it.
Simon CSuper UserAug 25, 2026#24
azvacs said: Mystery solved. It was a worn out gear pump. Back to full strength on lift arms and bucket curl after chasing this problem for more than a year. I just was throwing the wrong parts at it. Click to expand... Glad to see it is powered up again. Figured by the hours on unit that it was possibly gone. Fact it would not create enough pressure pointed to internal by pass. Simon C

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