4. MAINTENANCE AND ADJUSTMENTS
Page 13
© 2004-2008 DH Instruments, a Fluke Company
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MPG2 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 MPG2’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 screwing the variable volume all the way in (CW) with
the TEST1 port plugged and the TEST2 port open. Then use the filling and priming procedure described
in Section 3.2.1 to expel the rest of the liquid from MPG2. Collect the used liquid as it comes out of the
TEST2 port.
Refill the reservoir with fresh liquid.
Refill the MPG2 volumes with liquid by plugging the TEST1 port and opening the TEST2 port. Then use
the reservoir pump to inject liquid into MPG2 until only liquid and no air comes out of the TEST 2 port.
Plug the TEST2 port, and with the reservoir shut off valve open, fully unscrew (CCW) the variable
volume.
When flushing the MPG2, repeat the procedure above until the liquid coming out of the TEST2 port is clean.
