Elkhart Brass SM-2000E-HF - Manual (Page 7)

5
IV. Maintenance
A) Cleaning
The nozzle should be flushed thoroughly after each use. This is
accomplished by flowing the nozzle with a clean water source for both
water and foam inlets. Ensure the nozzle is set to the largest
proportioning rate.
B) Pilot Assembly
Figure 5 - Pilot Valve Assembly
1. Using a
5 /
32
” Allen wrench, remove the four screws that retain the flood
plate.
2. With the aid of a pair of channel lock pliers, remove the pilot valve
assembly by turning it counter clockwise.
Caution:
Do not allow the piston head and baffle head to turn. If necessary, use a
strap wrench to secure it while moving the pilot valve assembly.
3. Using an air nozzle and pressurized air source, blow through the holes
in the spring adjustment nut to remove any small debris.
Screws
Flood Plate
Baffle Head
Assembly
Pilot Valve Port
Piston Head
Pilot Valve
Spring Adjustment Nut