LeeBoy LB Performance CB95 - Brush Drive Relief Valve

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Maintenance
LB Performance CB95 Broom 5-21
Brush Drive Relief ValveBrush Drive Relief Valve
The brush drive circuit gets the remaining hydraulic ow
after the priority divider supplies the power steering.
The Brush Drive Relief Valve protects the brush drive
circuit and is also located end of the rotation control
valve under the cab on the right side of the broom.
(Figure 5-19)
Adjust the Brush Drive Relief Valve if:
• Brush stalls frequently.
• Brush lacks sweeping power.
• There is a constant noise while sweeping.
Only an experienced technician
should perform this procedure as death or serious
injury can result from improper valve adjustments.
See your authorized LB Performance dealer for
assistance if needed.
To adjust the Brush Drive Relief Valve:
1. Set the park brake and ensure the transmission is in
neutral. Use the foot brake as an added precaution.
2. Plumb a 0 - 5000 PSI (0 - 345 Bar) pressure gauge
into the rotation ow circuit. (Figure 5-18 includes
part numbers available from your authorized dealer.)
3. Turn the Brush Float control valve OFF by turning
clockwise until stopped.
4. Start the engine and warm the hydraulic oil to at
least 100° F.
5. Engage the brush drive control handle to turn brush
in the forward direction.
6. Increase engine speed to 2500 RPMs.
7. Using the Brush Forward/Reverse control, turn the
brush motor ON to engage the control valve.
8. The pressure gauge should read 2500 PSI +/- 100
PSI.
9. Disengage the brush drive control lever.
10. Adjust relief pressure by removing the Relief
Pressure Locknut and turning the adjusting
screw clockwise to increase pressure, or
counterclockwise to decrease pressure.
NOTE: Turn the adjusting screw in 1/8 turn
increments. Repeat turning increments until
the correct pressure is obtained.
PRESSURE HOSE
TO BRUSH DRIVE
MOTOR
RELIEF
VAVL E
Figure 5-19. Hydraulic Manifold (Brush Drive)