Solution Solenoid Removal; Solenoid Valve Disassembly And Cleaning - Nilfisk-Advance Hydro-Retriever 3800 Service Manual

SOLUTION SYSTEM

SOLUTION SOLENOID REMOVAL

1 Drain the solution tank or put the flow control lever in the full
OFF position to prevent solution loss.
2 With the operator seated turn on the key switch then press
the normal scrub button to lower the scrub deck to the floor.
Note: Don't turn the key switch off until disconnecting the
battery pack (push emergency disconnect knob (12)). This
procedure is done to prevent the scrub deck from automati-
cally raising when the key is turned off. Turn Key OFF.
3 Open the right side scrub brush access door then remove the
skirt assembly. Locate solenoid (front middle on scrub deck)
and unplug the solenoid wire connection from the machine
harness.
4 See Figure 3. Remove the Insulated Bushing (D) from the
valve body nipple, then remove the (E) Conduit Anchor
Connector.
5 Pull the valve from the deck mount bracket and loosen the (3)
hose clamps then pry the hoses from fittings to complete the
removal. Note: It may be easier to separate the two small
hoses at the ends of the solution delivery tubes.
6 Make service repairs and re-install valve by following the
above steps in reverse order.

SOLENOID VALVE DISASSEMBLY AND CLEANING

1 Remove the solenoid valve. See the Solenoid Valve Removal section for instructions.
2 See Figure 4. Remove the (2) (F) Screws and Nuts and disassemble the valve (be careful not to lose any internal parts).
3 Thoroughly wash dirt from Block (G) and Diaphragm (H).
4 After reassembling test the solenoid valve for proper operation.
Note: Solenoid valve replacement seal kit (Viton) is part number 56324506.
FIGURE 4
16 - FORM NO. 56043058 Hydro-Retriever™ 3800 / 2042 / BR 1100
F
G
H
FIGURE 3
Disc machine solenoid mount shown,
Cylindrical similar
F
revised 10/01
FRONT
E
D