Steer Right Relief; Swing Relief - JLG 400S Service And Maintenance Manual

SECTION 5 - BASIC HYDRAULICS INFORMATION & SCHEMATICS
3. If necessary, loosen jam nut and adjust the Steer Left
Relief valve clockwise to increase and counterclockwise
to decrease.
NOTE: Steer left pressure at port 24 is 2500 psi (173 Bar); a gauge
may be placed there for troubleshooting.

Steer Right Relief

1. Install a pressure gauge at port MP1 of the Main Control
Valve capable of reading pressures up to 4000 psi
(275 Bar).
2. Activate Steer Right function
continuously at end of stroke.
Observed pressure should be
2750 ± 75 psi (190 ± 6 Bar).
5-90
3. If necessary, loosen jam nut and adjust the Steer Right
Relief valve clockwise to increase and counterclockwise
to decrease.
NOTE: Steer Right pressure at port 23 is 2500 psi (173 Bar); a
gauge may be placed there for troubleshooting.

Swing Relief

1. Install a pressure gauge at port MP1 of the Main Control
Valve capable of reading pressures up to 3000 psi
(207 Bar).
2. Activate Boom Swing Right or Left
function continuously against the
stop or lock. Observed pressure
should be 1700 ± 50 psi (117 ± 4
Bar).
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