Terex Genie S-80 J, Service And Repair Manual

Page: 79 / 135

June 2021 Service and Repair Manual
Manifolds
Part No. 1285307GT S ® -80 J, S ® -80 J TraX ™ 67
7-7
Valve Adjustments - Traction
Manifold
How to Adjust the Charge
Pressure Relief Valve
Note: This procedure must be performed with the
hydraulic oil at the normal operating temperature
of 150° f / 65° c.
1 Connect a 0 to 600 psi / 0 to 50 bar pressure
gauge to the test port on the drive pump.
2 Hold the charge pressure relief valve and
remove the cap (item DI).
3 Turn the internal hex socket clockwise fully
until it stops. Install the cap.
4 Start the engine and move and hold the
function enable/rpm select toggle switch to
the high rpm (rabbit symbol) position. Note
the reading on the pressure gauge.
5 Turn the engine off.
6 Remove the pressure gauge from the drive
pump. Connect the gauge to the test port
located on the traction manifold.
7 Start the engine from the platform controls.
Press down the foot switch and slowly move
the drive control handle off center just until the
machine begins to move. Note the reading on
the pressure gauge. Turn the machine off.
8 Hold the charge pressure relief valve and
remove the cap (item DI).
9 Adjust the internal hex socket until the
pressure reading on the gauge is 30 psi /
2 bar less than the pressure reading on the
pump. Turn it clockwise to increase the
pressure or counterclockwise to decrease the
pressure. Install the valve cap.
10 Repeat steps 7 through 9 until the pressure
reading at the drive manifold is 30 psi / 2 bar
less than the pressure reading at the pump.
11 Turn the engine off and remove the pressure
gauge.