4. MAINTENANCE AND ADJUSTMENTS
Page 11
© 2004-2007 DH Instruments, a Fluke Company
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MPG1 was designed for maintenance free operation. The only recommended regular maintenance is to
flush the hydraulic system and replace the operating liquid.
4.1
REPLACING LIQUID AND FLUSHING HYDRAULIC SYSTEM
Regular replacement of MPG1’s operating liquid and flushing of the hydraulic system is recommended.
To empty the reservoir, remove the reservoir cover and siphon the bulk of liquid out of the reservoir.
Remove the balance of liquid from the system by cycling the variable volume with the TEST1 port
plugged and TEST2 port open following the filling and priming procedure described in Section 3.2.1.
Collect the used liquid as it comes out of the TEST1 port.
Refill the reservoir with fresh liquid. Pressurize MPG1 by plugging the TEST1 and TEST2 ports, closing
the RESERVOIR ISOLATION valve, opening the TEST ISOLATION valve and using the variable volume
to generate pressure. Then crack the TEST1 fitting to let fluid out. Screw the variable volume all the way
in to empty the variable volume out of the TEST1 port. Repeat until the liquid coming out of the TEST1
port is clean.
