Chapter 4 – Smoke Control Section, Page 4-44_________________________________________________
Wash System – Troubleshooting (Cont.)
Detergent Pump – Cont.
4)
Remove the Top Cap (Figure 4-45-1, Pc. 21) and then remove the Spring (Figure 4-45-1, Pc 11)
and the Poppet Check (Figure 4-45-1, Pc. 12). Repeat this procedure for the Bottom Adaptor
(Figure 4-45-1, Pc.10)
5)
Inspect the Pump Head for cracks and replace with a complete new Pump Head if necessary.
6)
If the Pump Head is not cracked, insert new Poppet Checks and reassemble.
7)
Before remounting the Pump Head, inspect the Diaphragm (Figure 4-45-1, Pc. 18) for cracks or
holes. Replace if necessary. To remove the Diaphragm unscrew counter clockwise.
8)
Mount Pump head to Pump Bracket.
9)
Reattach the vinyl and copper tubing.
10)
If the Pump Head does not operate properly after cleaning, replace with a Pump Head Kit (Refer
to page 7-8 for parts).
3.
Brass Check Valve (Refer to Figure 4-41-1 and Figure 4-45-1, Pc. 15).
a)
Remove, check and clean Brass Check Valve as follows:
1)
Turn off water at the Outlet Hand Valve that is part of the Backflow Preventer (Refer to Figure
4-41-1).
2)
Disconnect the copper tubing coming from the Detergent Flow Switch
3)
Remove the entire Brass Check Valve from the tee. Caution: Have a container ready to catch
the water that will come out the pipe tee when the valve is removed.
4)
Inspect the valve for deterioration and small holes and replace, if necessary, with a new Brass
Check Valve.
5)
To clean the Check Valve separate the two half’s of the body.
6)
Remove the Poppet Check and clean the valve body.
7)
Reassemble the check valve and reinstall in the tee.
8)
Reattach the copper tubing.
9)
If the Brass Check Valve does not operate properly after cleaning, replace with new one.
