07 d155 Hyd Circuit

D155AX-5 BulldozersD155AX-5 Bulldozers

Chapter 7 : Hydraulic circuitChapter 7 : Hydraulic circuit

Page 2D155AX-5Hyrdraulic circuit

JETT000200Prepared by J. Ghesquiere

WORK EQUIPMENT HYDRAULIC PIPING DIAGRAM

Main control valve

Blade tilt cylinder

Accumulator

Oil cooler

L.H. blade lift cylinder

Hydraulic tank

R.H. blade lift cylinder

SEMI U-DOZERQDV

HSS pump

Hyd temp’ sensor

Hydraulic filter

PPC, HSS charge valve

HSS charge filter

Work equipment pump (SAR(4)112)



Self reducing valve

PPC lock valve

Main control valve

Accumulator

Safety lever

HSS pump

Blade PPC lock valve

Ripper PPC lock valve

Hyd temp’ sensor

HYD pump

HYD filterPPC CONTROL PIPING DIAGRAM

Self reducing valve



WORK EQUIPMENT HYDRAULIC PIPING DIAGRAM

Giant-Shank Ripper Main control valve

Divider block

Ripper lift cylinder (LH)

Ripper tilt cylinder (LH)

Pin puller cylinder

Brake valve

To steering case

Pin puller solenoid valve



Hydraulic pump pressure outlet

Ls pressure outlet

Hydraulic filter

Hydraulic tank

To tank

Main control valve



Hydraulic pump pressure outlet

Ls pressure outlet

Main control valve



Ripper tilt

Ripper lift

Blade lift

Blade tilt

Load check valve Suction valve

Main relief valveUnload valve

HSS Charge filter

HSS Charge by-pass valve

Main control valve



Ripper tilt

Ripper lift

Blade lift

Blade tilt

Main control valve

Main relief valve



Hydraulic pump

Hydraulic pump outlet pressure sensor



Self reducing valve

Function

The self pressure reducing valves reduces the discharge pressure of the fan pump and supplies it to the PPC valve, the EPC valve, etc. as the control pressure.

PR : to PPC valve and EPC valve

P1: From pump T : To hydraulic tank



Hydraulic circuit

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07 d155 Hyd Circuit