October 2019
Service and Repair Manual
Manifolds
Part No. 1280490GT
S
®
-80 XC
™
• S
®
-85 XC
™
•
S
®
-
80 HF • S
®
-85 HF
67
How to Adj ust the Boom Extend R elief Valve
How to Adjust the Boom Extend
Relief Valve
Note: Perform this procedure with the boom in the
stowed position.
Note: Refer to Function Manifold Component list to
locate the boom extend relief valve.
Note: Auxiliary power will be used to perform this
procedure. Do not start the engine.
1 Connect a 0 to 3000 psi / 0 to 200 bar
pressure gauge to the diagnostic nipple
located next to the auxiliary pump.
2 Simultaneously activate and hold the auxiliary
power button and the primary boom extend
button with the boom fully extended. Observe
the pressure reading on the pressure gauge.
Refer to Specifications,
Hydraulic
Specifications
.
3 Locate the boom extend relief valve on the
function manifold. Use a wrench to hold the
relief valve and remove the cap.
4 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.
5 Repeat step2 to confirm relief valve pressure.
6 Remove the pressure gauge.
Summary of Contents for Genie S-80 HF Series
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