Unit Functions; Overview - Kärcher KMR 1250 B Service Manual

Unit Functions

Drive system
– When the hood is lifted up toward the rear, all
components become accessible for mainte-
nance purposes.
– Hydrostatic transmission with mechanical free-
wheeling device provides variable control of
forward and reverse driving speeds.
– Parking brake lever actuates transmission-
mounted disc brake.
– No foot brake required. Transmission provides
braking effect.
– Transmission, impeller fan, brush roller and
side brushes are belt-driven.
– Rear wheels are chain-driven.
– To start engine, driver must occupy operator
seat (seat contact switch).
– Discharge of debris container via electrically
driven hydraulic unit.
Sweeping system
– Brush roller counter-rotates against direction
of unit motion (throw-over principle).
– Debris container is located at rear of brush
roller.
– Two-position adjustment of brush roller via
control lever:
Center position: Rigid brush roller suspension
for level surfaces.
Bottom position: Floating brush roller suspen-
sion for uneven surfaces.
– Quick-change brush roller replacement. No
tools required.
– Side brush automatically extends outward
when lowered.
– Coarse-dirt flap accommodates pickup of bev-
erage cans, etc.
– Hydraulic discharge of debris container in
raised position (two-hand operation).
4
Suction and filtering system
– Dust pickup at brush roller.
– Large-capacity dust filter with mechanical dust
removal.
– Each time engine is shut off, dust filter is sub-
jected to automatic cleaning cycle of approx.
15-second duration.
– Impeller fan with closeable exhaust-air hatch
for wet-sweeping operation.
– Quick-change dust filter replacement. No tools
required.
– Impeller fan driven by elastic belt. No tension
adjustment required.
KMR 1250 B, LPG, D