Rosco RB48 - Movement, Steering, and Performance Issues

RB48 BROOM
5.3
ROSCO - A LeeBoy Company
Troubleshooting
Problem Cause
Solution
Engine cranking speed too low
Insufficient fuel supply to injector
nozzles
Fuel solenoid defective
Fuel filter plugged
Air in the fuel system
Fuel supply contaminated
Intake air system restricted
Parking brake engaged
Hydrostatic pump bypass valve open
Forward/Reverse relief valves are
bypassing oil at low pressure
Damaged hydrostatic pump
Damaged hydrostatic motor
Fast movement of direction control
handle
Parking brake not disengaged
Engine speed set too low
Low hydraulic fluid level
Air leaking into hydraulic system
Repair/clean battery terminal
connection. Charge/Replace.
Check fuel system. Clean/Replace fuel
filter.
Check/Replace defective fuel solenoid.
See Engine manual.
Replace fuel filter.
Check for air leaks in the low pressure
side of the fuel system. Prime fuel
system. See Engine manual.
Verify by operating engine with a known
fuel quality
Check for and remove restrictions
Release parking brake
The bypass valve is fully open at 2
revolutions. Close valve by turning
clockwise. Torque to 7-10 ft lb (9.5 to
14 Nm). DO NOT overtorque.
Repair/Replace relief valve cartridge(s)
Repair/Replace hydrostatic pump
Repair/Replace hydrostatic motor
Move handle slowly when changing
speed and/or direction
Release parking brake and/or check for
binding parking brake cable(s).
Run engine at higher RPM
Fill reservoir with correct fluid to visible
in sight gauge
Tighten or replace hoses, fittings and/or
filter(s)
Engine Difficult to Start, Or
Won't Start
Unit Doesn't Move With Engine
Running, Or Moves In One
Direction Only
Unit Jerks When Operating In
Forward or Reverse