Heavy Equipment Forums Heavy Equipment Community

320D excavator hydraulic low

bereket ยท 2023-03-17 13:00

Excavator Model: 320D Serial number prefix: PHX Problem: hydraulic low power Engine is in good condition Hydraulic service done As the machine works or stalls hydraulic Pressures are low as follows. - power shift pressure drops up to 210 psi - pump#1. 3400 psi - pump#2. 3400 psi Please help for probable causes Thanks in adavance

Replies8
  1. #1heymccall2023-03-17 13:14

    What are the fault codes?

  2. #2bereket2023-03-18 16:06

    261-11 (Engine Timing Offset fault) is active code

  3. #3bereket2023-03-21 07:12

    Any suggestion please

  4. #4DEMLONE702023-03-21 12:47

    There is a problem with the assembly of the gear train. "Fuel Injection Timing - Check"

  5. #5bereket2023-03-22 05:09

    Yes you are right there was a problem in the injection timing , but still there is low hydraulic pressure. Both pump#1 and pump#2

  6. #6DEMLONE702023-03-22 13:44

    But u have active code

  7. #7heymccall2023-03-22 14:07

    The pump control relies on engine performance. The whole operation of pump control is to ensure maximum hydraulic performance based on engine response. The pump control will destroke any time that the engine falters out of it's performance window, ie, when the rpms drop more than 100rpm. In layman's terms, the system is designed to keep the engine rpms within 100rpm of the target speed, by reducing (varying) the hydraulic load. Your existing, active, fault is conveying to the controller to not utilize the pump fully. Repair your engine fault first.

  8. #8bereket2023-03-23 02:58

    OK let me fix that first and see the result