Sweeping System; Functional Overview; Electrical Diagram; Hydraulic Diagram - Nilfisk-Advance Advance Retriever 2060 Service Manual

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FUNCTIONAL OVERVIEW

The 2060 / SR 1800 sweeper has a forward-throw or dustpan designed sweeping system. In a forward throw design the broom is made
to rotate in such a direction that it will sweep the dirt and debris forward into a front-end hopper. The broom is driven by a drive lug
assembly, which is a lug mounted on a hydraulic motor, located on the left side of the broom housing. The right side of the broom is
mounted to an idler hub assembly, which swings out of the way to allow for easy broom removal. The drive and idler assemblies are
connected by a hex arm weldment, this arm is connected through a linkage to the broom lift lever, which raises and lowers the broom.
A side broom is used to sweep debris from edges or curbs into the path of the main broom. A hub mounted to a hydraulic motor drives
the side broom. The motor is mounted on a weldment that will allow for the correct side broom angle adjustment. The side broom is
raised and lowered by a cable that is connected at the side broom lever, runs through three pulleys and is connected at the side broom
weldment. The cable and pulleys are accessible by removing the right side hopper panel.
The main broom and side broom are driven by hydraulic motors. Electrically activated control valves control the hydraulic flow to the
motors. The main broom solenoid (L3) is energized when the main broom switch (S13), a NC switch is not activated. The side broom
solenoid (L4) is energized when the side broom switch (S14), a NC switch is not activated. The main and side broom motors will only
operate if the hopper dump door interlock switch (S12) is closed. If the hopper dump door is closed, or if the hopper is raised, the interlock
switch (S12) will open the circuit to S13 and S14, not allowing the solenoids L3 and L4 to energize, and will light up the Dump Door
Indicator Light.
The first accessory gear pump hydraulically drives the two motors. When L3 and L4 are not energized the hydraulic oil will bypass the
motors. The relief valve for the system is located inside the same block as the (L3) main broom solenoid valve. This relief valve is set
to open at 2500 PSI.
+
3.8 AMPS
Sweeping System Electrical Diagram
Relief Block
B
L3
P
8.7
GPM
Accessory
Pump
.84 CIR
Dual Gear Pump
From Reservoir
Sweeping System Hydraulic Diagram
S12
ORN
S13
WHT/BLU
S14
WHT/BLU
Main
Broom
4.5 CIR
A
2500
PSI
T
To Manifold

SWEEPING SYSTEM

L3
2
ORN/GRN 1 BLK
23 W
L4
2
YEL/BRN 1 BLK
23 W
L4
FORM NO. 56043051 / Retriever
_
Side
Broom
17.9 CIR
™ 2060 - 13