Squeegee System; Functional Overview; Electrical System Diagram; Form No. 56043052 / Hydro-Retriever™ 2052, Cr - Nilfisk-Advance HYDRO-RETRIEVER 2052 Service Manual

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Instructions for use manual (38 pages)

Instructions for use manual (37 pages)

Table of Contents

SQUEEGEE SYSTEM

SQUEEGEE LIFT MOTOR SYSTEM GENERAL OVERVIEW

The squeegee pick up tool is raised and lowered by an electric actuator motor and cable assembly located at the back of the machine, below the

battery and recovery tank. The squeegee lift circuit is controlled by the S6 vacuum/squeegee switch located on the dashboard, the reverse

directional switch S2 mounted on the drive pedal linkage and the E2 actuator controller mounted in the left panel electrical box are the system

components that manage the functions of the F5 squeegee lift motor.

Squeegee Lift Motor Function

See diagram below. To lower the squeegee tool to the floor place the S6 vacuum/squeegee rocker switch to the on position. With the S6 vacuum/

squeegee switch closed a negative 36V passes through the closed S2 reverse switch and is the direction-input signal for the E2 controller. The

negative 36V at the direction terminal energizes the internal relay built into the module and directs the correct output voltage (polarity) to run the

M5 squeegee lift motor. The lift actuator motor uses two internal limit switches to open the motor circuit and stop the motor's travel for both raising

and lowering functions. To raise the squeegee tool the drive pedal must be placed in reverse and this opens the S2 reverse switch and removes

the –36V input signal to the E2 module. Note: It can also be raised by placing the S6 switch in the middle (off) position, which also removes the

–36V signal to the module. The E2 direction terminal will now read zero volts and this de-energizes the internal relay and changes the polarity

at the module's output and the squeegee tool is raised automatically.

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Squeegee System Electrical Diagram

Note: Squeegee Tool Is Shown Lowered

50 - FORM NO. 56043052 / HYDRO-RETRIEVER™ 2052, CR 1300

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