2. Operating the Engine (pt 3)

Question 1

What is the most common reason for not having a prime after putting the pump into gear?

What are four other reasons?

Answer 1

1. Tank-to-pump closed
2. Pump drain valves open
3. Pump drain line broken
4. Tank empty
5. Sucked up air

Question 2

How much GPMs does the engine / recirc cooler circulate? What size line?

Is there anything similar for a pump cooler?

Answer 2

1. 3-5gpm
   2 3/8th
2. In the new trucks there is also a pump cooler that circulates 3-5gpm to cool the pump

Question 3

What size piping is the tank to pump and how many GPMs?

What size piping is the tank fill line for our trucks?

Answer 3

1. Tank to pump: 3inch plumbing 3 1/2inch valve
2. 500gmn
3. Tank fill: 1 1/2inch piping (Kirk says this is for all red trucks, other trucks may be different)