JLG 45e ANSI Service Manual - Manual (Page 79)

SECTION 3 - TROUBLESHOOTING
3120743 – JLG Lift – 3-3
Platform will not adjust “up” to level.
Hydraulic pump not functioning properly. Repair or replace pump.
Restricted or broken hydraulic line or fitting. Clean, repair, or replace line or fitting.
Slave cylinder not functioning properly. Repair or replace cylinder.
Electrical failure. See proper wiring diagram. Run systems test
Orifice plugged. Clean orifice.
Platform will not adjust “down” to level.
See: Platform will not adjust “up” to level.
Table 3-1.Platform Assembly - Troubleshooting