MTS Landmark Floor Standing - Manual (Page 103)

Description Item
Regulator Output Pressure Gage 13
Regulator Shut-Off Valve 14
Regulator Output Pressure Valve 15
Nitrogen Supply Hose 16
Input Check Valve 17
Bleed Valve 18
Extension Hose 19
Gage Protector (factory set to limit pressure to the gage to approximately 1.4 MPa
(200 psi) 20
High Pressure Gage—0–21 MPa (0–3000 psi) 21
Low Pressure Gage—0–2.1 MPa (0–300 psi) 22
Chuck Valve 23
2. With an open-end wrench, turn the locknut counterclockwise on the accumulator valve assembly to open
the valve. Read the pressure on either the high or low accumulator charging kit pressure gage.
a) If the pressure reading is other than the required pressure level recorded on the accumulator, continue
with the next subsection, “Change the Precharge Pressure”.
b) If the pressure level corresponds to the level recorded on the accumulator label, turn the locknut
clockwise to close the valve and continue this procedure.
3. Open the bleed valve on the accumulator charging kit and remove the chuck valve from the accumulator.
Replace the valve stem cap and protective cover on the accumulator.
Change the Precharge Pressure
Often the precharge of an accumulator mounted on a hydraulic supply line is increased to enhance system
performance and reduce the transient HPS flow demands. Accumulators may be precharged to 10 MPa (1500
psi) or more, although amounts above 14 MPa (2200 psi) will have less and less performance effect in most
situations. Be sure that you read the following warning before you charge your accumulator.
MTS Landmark™ Floor Standing Load Units Product Information 103
Maintenance