HydraMaster Boxxer 423s, Owner'S Manual, Page: 28 / 92

4-5: Operating Instructions Operating Instructions: 4-4
10. Turn the “CHEMICAL SYSTEM” valve to the “PRIME” position to purge any air from
the system (see Figure 4-3).
a. With the truckmount running at full throttle, block off the vacuum intake to the
recovery tank. The vacuum gauge should read 12” Hg. This will assist in priming
the chemical system.
b.
Allow the chemical to flow through the CHEMICAL METER at full flow for 30
seconds.
c. Turn the “CHEMICAL SYSTEM” valve to “ON.” The restriction can now be
removed from the vacuum inlet.
d.
While spraying solution from the cleaning tool, adjust the chemical flow by
turning the “CHEMICAL METERING CONTROL” knob.
11. Begin cleaning.
SHUT DOWN PROCEDURE
1. Flush clean water through the chemical system for 10 seconds. Turn the “CHEMICAL
SYSTEM” valve to “OFF”.
2. Cool the truckmount down by turning the “PUMP CLUTCH” switch to “PUMP ON-
NO HEAT”. Spray the cleaning wand into the vacuum hose for 3-5 minutes. The
chemical should now be flushed from the truckmount, hoses and cleaning tool.
3. Remove the vacuum hose.
4. Lubricate the blower to prevent it from rusting internally.
a. Allow the unit to run for a few minutes with the vacuum hose disconnected in
order to remove moisture from the blower.
b. Cap off the inlet(s) to the recovery tank.
c. Spray a HydraMaster-recommended spray lubricant into the “BLOWER LUBE
PORT” for about 5 to 7 seconds while the unit is running (see Figure 4-2).
d.
Allow machine to run additional 2 to 5 minutes under load to flush off lubricant.
e. Uncap the inlet(s) and run the unit for another minute to allow the blower to cool
down.
5. If freeze guarding is necessary, perform the procedure at this time. See the Freeze
Guarding section of this Owner’s Manual (see page 5-18).
6. Push the “THROTTLE” cable to the “IDLE ” position.
7. Turn the ignition switch to “OFF.
8. Drain the water box using the water box drain valve (see Figure 4-2) .
9. Drain the recovery tank in an appropriate location.
In accordance with EPA, state and local laws, do not dispose of water into gutters,
storm drains, streams or reservoirs.
10.
Perform daily maintenance as specified in Section 5 of this Owner’s Manual.
Chemical
Metering
Control
Knob
Chemical
System
Valve
Chemical
Meter
Figure 4-3. Boxxer 423s Chemical System Control and Metering