JLG 1850SJ Service And Maintenance Manual page 368

SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS
4. Reconnect lift down coil.
5. Retighten locknuts.
LIFT UP
1. Install a high pressure gauge at the "M5" port of the
main valve block.
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2. Plug and cap the hose on port 5. Activate lift up. The
gauge should read 3700 psi. (255 bar).
3. The adjustment cartridge is located to the right of port
5. Turn clockwise to increase pressure, counter clockwise
to decrease.
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