Hello, I have a problem with a Bobcat 763.Hydraulic functions are very slow(lift and tilt).I have to go to max RPM, and there is a slow function.Without max RPM, there's no function.I removed already the hydraulic control valve, and BICS, and check every single valve, but everything ( the seals, the springs) are ok. Also i replace the main releive valve, because when i try to measured the capacity and the pressure, the pressure was 12-18bar., and the capacity around 10-15 l/min lower than the pump passport. The hydraulic cylinders are new, so the problem isn't there.Please tell me what can i do. My last chanse is to replace the pump.But the pressure depends from the relieve valves, so...? Note:The pump was repaired before( i don't know what kind of repair), and may be that is where the problem lies, but the flow is almost borders ...? Please help.
Does the drive function remain strong when this happens? Where did you tap into system to check pressure? What series is your 763, the C, F, or G series? Does it have high flow option? Is it standard controls or Advance Hand Controls? What is the machine serial number? The reason I ask all these questions is that it's 9:05 PM here, I likely won't see your response until tomorrow evening and would like to have all the info I can get. BTW, welcome to HEF Tzarevetz. :usa
Hello The answers are: 1. Yes, the functions remain strong when this happens 2.Quick couplers, and i have a Parker pressure/capacity tool with a digital multimeter for the bars and liters. 3.I really don't know 4.Yes it is high flow 5.Standart control with pedals and levers 6.Serial number is :512620530 Sorry for the delay, and thank you!
Just one thing.At the moment i am changing the gear pump, and may be tommorow I'll know the result.
The model series is important for getting proper information. The C series has a two piece rear door, orange at the lower part, black at the upper part, and has external mounted rectangle headlights. The F series has a one piece stamped steel door, all orange, and has the external rectangle headlights. The G series has one piece stamped steel door, all orange, and has triangle shaped flush mount headlights in cab frame. Here's a pic of the rear door on a C series. Note the black portion at top of rear door. The F and the G are one piece orange. The G is notable by the triangle headlights.
Hello again, sorry about the delay. It was the pump.Now everything is OK. Thank you, and have a nice day