Brush Bandit 1290XP, Operating & Parts Manual

Page: 80 / 140

Bandit
Copyright 12/07 PAGE 8
MODELS 1290XP/1590
HYDRAULIC SECTION
THE BANDIT CHIPPER IS EQUIPPED WITH ONE OF THREE
POSSIBLE MAIN RELIEF HYDRAULIC PRESSURE ADJUSTMENT PROCEDURES
PROCEDURE 1 FOR MODELS 1290XP/1590 WITH NO OPTIONS
The relief valve is typically located internally in the control valve. Do not adjust this relief valve above 200
PSI (172 bar). The relief valve system is a simple spring tension design but small pieces of debris can
stick the valve partially open which weakens the feedwheel power. The relief as well as hydraulic oil, and
screen must be kept clean.
1. VALVE SEAT:
The springs pushes the relief valve ball against it, until pressure builds.
2. POPPIT VALVE:
This ball opens and closes to relieve excess pressure on hydraulic system.
3. RELIEF SPRING:
This spring tensions the amount of pressure required to open the relief valve ball. This spring weakens
and must be checked and/or readjusted every month for best performance.
4. SLOTTED SET SCREW:
Turn clockwise to increase pressure, but do not surpass maximum of 2500 PSI (172 bar).
5. HEX HEAD PLUG:
Remove to access the relief valve.
Feedwheel
Control Valve
HYDRAULIC SECTION