Schmidt AS 990 - Hydraulic system

Translation of Original Operating Instructions
Airport Sweeper / Airport Stand Cleaner
2017-02-02 37
7.6 Drive engine
A diesel engine has been integrated for driving the
hydraulic system (for blower, sweeper drive, water
pump and oil cooler).
The silencer is located above the engine.
The engine is also equipped with a dry air filter
with an electrical maintenance switch.
Fuel for this engine and the vehicle is supplied
by a single tank.
All engine data that is necessary for operation is
displayed on the control panel.
Overview
(1): Diesel engine
(2): Exhaust system / SCR catalytic converter
(3): Air suction system
(4): Coolant container
(5): Coolant filler opening
(6): Engine cooler
(7): Engine oil filler opening
(8): Engine oil dip-stick
(9): Cleaning aperture
7.7 AS 990 carbamide tank
In order to comply with legal exhaust regulations,
the machine can be equipped with a carbamide
tank.
It is active only when the engine speed is increased,
not during idling speed.
7.8 Hydraulic system
The hydraulic pumps are mounted directly on the
diesel engine. They drive the blower, the cross
brush, the disc brushes, the oil cooler blower
and supply the hydraulic control elements of the
machine. The hydraulic oil tank with filter and all the
control elements are integrated in the hydraulic unit.
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