NORAC UC4+BC+JD8A - Manual (Page 25)

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4.7.2 Expansion Block Assembly
1. Remove the four 4MBP plugs from the 3
station valve block (Figure 25).
2. Coat the four o-rings in hydraulic oil
and install them into the expansion
block. Ensure the o-rings are seated
properly.
3. Attach the expansion block to the 3
station block using the included spring
washers and bolts.
4. Tighten the bolts to 31 ft-lbs.
Figure 25: NORAC Expansion Block Assembly