Hale and Waterous Relief Valve Operational Checks
I am looking for the manufacturers recommendation for daily / weekly operational checks for pumps that include exercising and inspecting the relief valves. How do you do it?
We follow these steps (after checking all fluids):
1. Apparatus on ramp outside station
2. Put pump in gear
3. Chock wheels
4. Open tank suction and tank fill half way to circulate water
5. Increase engine RPM to 1000
6. Operate primer
7. HALE - Turn handle all the way counterclockwise
8. HALE - Amber light ON (valve open)
9. HALE - Set relief valve and increase RPM to get 1000 kPa pressure (150psi)
10. HALE - Increase RPM to build pressure and open relief valve, light on
11. HALE - Decrease RPM to lower pressure and close relief valve, light off
12. HALE - Repeat a few times to exercise valve
13. HALE - Decrease RPM to idle, close valves,
14. HALE - leave valve set at 1000 kPa???? Different opinions????
15. HALE - Take pump out of gear and return to apparatus bay
7. WATEROUS - Increase RPM to get 1000 kPa pressure (150 psi)
8. WATEROUS - Remove strainer, clean and inspect
9. WATEROUS - Slowly turn on and off switch to flush, monitor lights
10. WATEROUS - Replace strainer and turn switch on
11. WATEROUS - Set relief valve and increase RPM as required
12. WATEROUS - Increase RPM to open valve, decrease RPM to close valve
13. WATEROUS - Repeat several times to exercise valve
14. WATEROUS - Decrease RPM to idle, close valves, turn of relief valve
15. WATEROUS - Leave set at 1000 kPa???
16. WATEROUS - Take pump out of gear and return to apparatus bay
Need to "Eat a little CROW"
Over the week-end, I had the good fortune to work with an "OLDER" Pierce engine with a Watrous pump & a relief valve. Turned out that the pilot needed 26 turns to reach 150 PSI set point. Ya always look like a CHUMP when Ya say I NEVER SAW.." .. ". Had to revise my advice. Try setting the relief where you want to operate, and then count the number of turns back to zero. Then you will know for sure on that particular pump.