2019 13 D4OPTRS
HOPPER
FUNCTION
The hopper is designed to provide a containment area for material picked up during sweeping
operations and/or auxiliary hand hose use. Its shape serves to distribute the load evenly and
centrally over the rear axle and aid in breaking loose the load as it shifts toward the hopper
door opening when dumping. The confi guration of the hopper, when fully raised, allows
dumping into containers up to 72" (182.9 cm) in height.
By engaging the dump toggle switch located between the blower housing and the front
storage compartment with the auxiliary engine at idle the dump door will open and then the
hopper will raise and expel its contents. Energizing the dump switch in the opposite direction
will lower the hopper and close the dump door.
A large screen at the top of the hopper stops lightweight debris from entering the dust
separator and blower housing.
TROUBLESHOOTER’S GUIDE
WARNING: Before servicing, stop auxiliary engine and remove ignition
key or disconnect negative battery cable. When working
under or around raised hopper, ALWAYS install pin in lower
safety strut.
!
PROBLEM
Low sweeper effi ciency
Excessively dusty condition
Rear door will not open or
close and hopper will not
raise or lower
Rear door creeps open
CAUSE
Faulty seals
Screen clogged
Dust control system
inoperable
Loss of hydraulic pressure
Hydraulic valve will not
operate
Hydraulic leak
Leak in hydraulic lock
valve
SOLUTION
Check door seal.
Check suction intake seal.
Check separator seal.
Check cleanliness of screen.
Check water tank (See Water
System Troubleshooting Section)
See HYDRAULIC SYSTEM
Section.
(See Hydraulic Troubleshooting
Section.)
Check for leak in hydraulic
system.
Check for leak in hydraulic lock
valve or hoses. Replace seals in
valves. Replace valve.
To Next Page