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Service Manual – Floortec R 870
Hopper System
133
Hopper System
Functional Description
The hopper lifting system is operated by an hydraulic cylinder driven by an electric pump motor (M3) with
integrated hydraulic unit
The pump motor (M3) is powered by 2 relays (K3A) and (K3B), driven respectively for hopper lifting and lower-
ing The pump is protected by the fuse (F6)
The relays are driven by the hopper movement enabling switch (SW4) and by the hopper lifting/lowering
switch (SW5)
To lift or lower the hopper is essential to simultaneously operate both switches
This may create a potential hazard to people who might be near the arm system and hopper while moving
When the hopper comes out of its rest position, the position sensor (S1) provides its signal to the dashboard
electronic board (EB2) and to the drive system electronic board (EB1) in order to obtain the following automat-
ic functions: Reduction of machine maximum speed (by EB1 electronic board), activation of the buzzer (BZ1)
and hopper lifting warning light (A), switching off of the vacuum system motor (M1) and of the broom motors
(M4, M6, M7) (by EB2 electronic board).
At different heights of the lifting system, the release lever for hopper dumping can be activated.
The lever, by means of a metal cable, controls a rod which opens the locking system and releases the telescopic
arm thus allowing the hopper to rotate and dump
Once the hopper is turned for dumping, it can be shaken or engaged back to its position by using the hopper
manual returning handle. If it is not manually engaged, it engages automatically when the hopper returns to
the rest position (closed)
A
P200246
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Troubleshooting
