NORAC UC4.5-BC-HD4 Part 1 - Manual (Page 34)

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8.3 Valve Mounting on Delta (LPZ)
Mount the block as illustrated in Figure 33. This will require drilling holes though the sheet-
metal on the boom. Use Item B14 and B15 (do not use Item B10 mounting hardware).
Figure 32: Valve Block Mounting Location on LPZ
Figure 33: Valve Block Mounted on LPZ