Valve Adjustments - Function Manifold; How To Adjust The Boom Extend Relief Valve - Terex Genie S-40 XC Service And Repair Manual

February 2023
7-2 Valve Adjustments - Function
Manifold
How to Adjust the System Relief
Valve
Note: Perform this procedure with the boom in the
stowed position.
1 Connect a 0 to 5000 psi / 0 to 350 bar
pressure gauge to the ptest port on the
function manifold.
2 Start the engine from the ground controls.
3 Hold the function enable/rpm select toggle
switch to the high idle position. Activate and
hold the boom retract toggle switch with the
boom fully retracted.
4 Observe the pressure reading on the pressure
gauge. Refer to Specifications, Hydraulic
Specifications.
5 Turn the engine off. Use a wrench to hold the
relief valve and remove the cap (item K).
6 Adjust the internal hex socket. Turn it
clockwise to increase the pressure or
counterclockwise to decrease the pressure.
Install the relief valve cap..
Tip-over hazard. Do not adjust
the relief valve higher than
specified.
7 Repeat steps 2 through 5 and recheck relief
valve pressure.
8 Remove the pressure gauge.
Part No. 1286829GT S -40/45 XC • S -40/45 HF • S
® ™ ®
How to Adjust the Boom Extend
How to Adj ust the Boom Ex tend R elief Valve
Relief Valve
Note: Perform this procedure with the machine in
the stowed position.
Note: Refer to the Function Manifold Component
list to locate the Boom Extend Relief valve.
1 Connect a 0 to 5000 psi / 0 to 350 bar
pressure gauge to the ptest port on the
function manifold.
2 Start the engine from the ground controls.
3 Press and hold the function enable button.
Activate and hold the primary boom extend
switch with the boom fully extended.
4 Observe the pressure reading on the pressure
gauge. Refer to Specifications, Hydraulic
Component Specifications.
5 Turn the engine off. Use a wrench to hold the
relief valve and remove the cap. Refer to
Repair Procedures, Function Manifold
Components, item BG.
6 Adjust the internal hex socket. Turn it
clockwise to increase the pressure or
counterclockwise to decrease the pressure.
Install the relief valve cap.
Tip-over hazard. Do not adjust
the relief valve higher than
specified.
7 Repeat this procedure beginning with step
2 to confirm the relief valve pressure.
8 Remove the pressure gauge.
-40/45 TraX
® ™
Service and Repair Manual
Manifolds
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