
RB48 BROOM
ROSCO - A LeeBoy Company
Maintenance
4.10
MAINTENANCE
Figure 4-E
Setting Brush Rotation Relief Valve
B.
Adjusting Brush Rotation Relief Valve -
The Brush Rotation Circuit gets its hydraulic flow
from the excess flow port of the hydraulic pump.
This flow has no relief valve at the pump. The
relief valve is built into the brush rotation control
valve. This valve controls the forward and
reverse rotation of the brush drive motor. The
valve is located below the operator's platform on
the right side of the broom.
Adjust the relief valve if:
-
Brush stalls frequently
-
Brush lacks sweeping power
-
There is a constant noise while sweeping
1.
Plumb a 0 to 5000 psi gauge into the Brush
Rotation Flow Circuit as shown in Figure 4-
E. Parts needed for this step, including a
pressure gauge, can be obtained from your
authorized Rosco dealer. Part numbers
are shown. Pressure port to Brush Motor
must be blocked with cap as shown.
2.
Turn Brush Float control valve OFF
(clockwise until stopped).
3.
Start the engine and warm up the hydraulic
oil to at least 100° F.
4.
Set the parking brake and be sure the
transmission is in neutral.
CAUTION: Use extreme
caution when working under the
ROSCO Broom while adjusting
Brush Rotation hydraulic
pressure. Have another person
who is familiar with the machine
assist you.
5.
Engage the Brush Rotation control handle
to turn the brush in the forward direction.
6.
Increase engine speed to 2500 RPM.
7.
Take a pressure reading. The pressure
gauge should read 3000 +/- 100 psi.
8.
Disengage the Brush Rotation control
lever.
9.
Adjust the Relief Valve by removing
locknut and turning the adjusting screw
clockwise to increase pressure and
counterclockwise to decrease pressure.
Turn adjusting screw in 1/8 turn
increments and repeat steps 5 thru 8 until
correct pressure is obtained.
INSTALL CAP, 72305
Summary of Contents for RB48
Page 10: ...Introduction 1 8 ROSCO A LeeBoy Company RB48 BROOM NOTES ...
Page 32: ...RB48 BROOM ROSCO A LeeBoy Company Operation 3 10 OPERATION NOTES ...
Page 50: ...RB48 BROOM ROSCO A LeeBoy Company Maintenance 4 18 NOTES ...
Page 58: ...ROSCO A LeeBoy Company Troubleshooting 5 8 RB48 BROOM NOTES ...
Page 61: ...ROSCO A LeeBoy Company 6 3 Parts Book REF REV RB48 BROOM FINAL DETAIL GROUP 21092 N ...
Page 62: ...REF REV 21092 N RB48 BROOM FINAL DETAIL GROUP Parts Book 6 4 ROSCO A LeeBoy Company ...
Page 63: ...REF REV 21092 N RB48 BROOM FINAL DETAIL GROUP ROSCO A LeeBoy Company 6 5 Parts Book ...
Page 65: ...ROSCO A LeeBoy Company 6 7 Parts Book REF REV RB48 BROOM 29187 D ENGINE SUB ASSEMBLY CUMMINS ...
Page 67: ...ROSCO A LeeBoy Company 6 9 Parts Book REF REV RB48 BROOM 29187 D ENGINE SUB ASSEMBLY CUMMINS ...
Page 71: ...ROSCO A LeeBoy Company 6 13 Parts Book REF REV RB48 BROOM 29188 C ENGINE SUB ASSEMBLY PERKINS ...
Page 73: ...ROSCO A LeeBoy Company 6 15 Parts Book REF REV RB48 BROOM ENGINE SUB ASSEMBLY PERKINS 29188 C ...
Page 79: ...ROSCO A LeeBoy Company 6 21 Parts Book REF REV RB48 BROOM 28240 D CONTROL GROUP ...
Page 83: ...ROSCO A LeeBoy Company 6 25 Parts Book REF REV RB48 BROOM INSTRUMENT PANEL 39140 0 ...
Page 85: ...ROSCO A LeeBoy Company 6 27 Parts Book REF REV RB48 BROOM INSTRUMENT FUSE PANEL 28032 0 ...
Page 87: ...ROSCO A LeeBoy Company 6 29 Parts Book REF REV RB48 BROOM 26970 0 FUSE PANEL SUB ASSEMBLY ...
Page 89: ...ROSCO A LeeBoy Company 6 31 Parts Book REF REV RB48 BROOM 29084 0 FRAME ASSEMBLY ...
Page 91: ...ROSCO A LeeBoy Company 6 33 Parts Book REF REV RB48 BROOM 29043 A FRONT AXLE ASSEMBLY ...
Page 97: ...ROSCO A LeeBoy Company 6 39 Parts Book REF REV RB48 BROOM 29048 0 ENGINE COVER ASSEMBLY ...
Page 103: ...ROSCO A LeeBoy Company 6 45 Parts Book REF REV RB48 BROOM 28235 G CAB ASSEMBLY 2 DOOR ...
Page 105: ...ROSCO A LeeBoy Company 6 47 Parts Book REF REV RB48 BROOM CAB ASSEMBLY 2 DOOR 28235 G ...
Page 106: ...RB48 BROOM REF REV 28235 G CAB ASSEMBLY 2 DOOR Parts Book 6 48 ROSCO A LeeBoy Company ...
Page 113: ...ROSCO A LeeBoy Company 6 55 Parts Book REF REV RB48 BROOM 38653 0 CAB AIR COND HEATER KIT ...
Page 117: ...ROSCO A LeeBoy Company 6 59 Parts Book REF REV RB48 BROOM WATER SPRAY GROUP 28241 B ...
Page 121: ...ROSCO A LeeBoy Company 6 63 Parts Book REF REV RB48 BROOM HYDRAULIC GROUP 29085 A ...
Page 123: ...ROSCO A LeeBoy Company 6 65 Parts Book REF REV RB48 BROOM HYDRAULIC GROUP 29085 A ...
Page 125: ...ROSCO A LeeBoy Company 6 67 Parts Book REF REV RB48 BROOM HYDRAULIC GROUP 29085 A ...
Page 129: ...ROSCO A LeeBoy Company 6 71 Parts Book REF REV RB48 BROOM PARK BRAKE GROUP 21250 E ...
Page 174: ...Alphabetical Index Parts Book 6 116 ROSCO A LeeBoy Company ...