2019 19 D4OPTRS
SERVICE & MAINTENANCE
HYDRAULIC SYSTEM ADJUSTMENTS
Dual Gutter Broom Option - Refer to Hydraulic System Drawings and control valve as-
sembly drawing. In order to check or set the pressures required, which is 2500 PSI (172.5
Bar) for the primary pressure (Gutter Brooms) and 1500 PSI (103.5 Bar) for the secondary
pressure (Pickup Head and Dump), a gauge with a pressure range of 0 to 3000 PSI (0 to 207
Bar) is necessary. See section TK of this manual for part number of correct test gauge. With
auxiliary engine off, install test gauge on male quick disconnect test port. NOTE: All pressure
testing should be done with hydraulic oil at operating temperature. Start auxiliary engine and
raise either gutter broom. Hold switch to “raise” position after gutter broom has completed its
travel and read primary pressure which should be 2500 PSI (172.5 Bar). NOTE: The primary
pressure reading is direct from the pump and is not adjustable within the sweeper system.
To test the secondary pressure, leave test gauge in the same position and with the auxiliary
engine running, lower the hopper to its full travel, hold the switch to the “Lower” position and
read the test gauge, 1500 PSI (103.5 Bar) should be the pressure reading. If adjustment
is required, loosen jam nut on relief valve and turn setting clockwise to raise pressure and
counterclockwise to lower pressure and tighten jam nut.
Standard L.H. Gutter Broom - When sweeper is equipped with a single gutter broom, all
functions are operated at 1500 PSI (103.5 Bar) and set as described in the secondary pres-
sure setting method noted above.
Hydraulic Oil Reservoir - The hydraulic oil reservoir has an operating capacity of 12.5 gal-
lons (47.3 L) and its level should be checked DAILY prior to sweeping operations by observ-
ing the sight gauge located on the left side of the reservoir. The reservoir and the system fi lter
are positioned beneath the dust separator assembly. The hydraulic system motor oil should
be changed after 2000 hours or as needed according to oil analysis. The system fi lter should
be changed every 1000 hours of use.
WARNING: Before servicing, stop auxiliary engine and remove ignition
key or disconnect negative battery cable.
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