Loading And Unloading The Trailer
15. Open proportioning valve (E) to full-open position. See Figure 5-12.
Figure 5-12 – Proportioning Valve Open
16. When tank pressure drops, close front discharge valve (F). 17. Slowly open discharge valve on next hopper (working front to rear of trailer) to unload that hopper. 18. When tank pressure begins to drop rapidly, close discharge valve. 19. Repeat Steps 13 - 15 for remaining hoppers. 20. Purge hopper by slowly opening and closing each discharge valve, working front to rear of trailer. 21. Disengage blower. 22. Open blow down valve (D) to relieve tank pressure. See Figure 5-13.
Figure 5-13 – Blow Down Valve Open
23. Disconnect and stow discharge hose.
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