March 2008 "3072RT / 3772RT / 3772RT HD" Service & Parts Manual - ANSI Specifications
Page 1-4
Fluid Recommendations
MEC recommends the use of Mobil 424 hydraulic fluid. Do not substitute with lower grade oils as
pump damage may result.
Hydraulic Fluid Analysis
Use the following as a guide to determine when analysis of the hydraulic fluid is necessary:
• Anytime the hydraulic pump is replaced.
• If fluid discoloration is noticed in the hydraulic reservoir sight gauge tube.
• If after the first 50 hours of operation, the hydraulic filter element is plugged.
• Anytime the hydraulic filter element shows signs of metal contamination.
• Once every six (6) months, under normal operating conditions.
• Every three (3) months, in extremely dusty or dirty operating conditions.
The hydraulic fluid analysis must be done by a qualified laboratory. Always provide the following
information with the test sample.
• Type of hydraulic fluid (see lubrication chart for recommended hydraulic fluid and/or your
records).
• Model and Serial number of machine from which sample was taken.
• Purpose of analysis: pump failure, discoloration, etc.
• Type of analysis: complete to show additive breakdown, acid buildup, viscosity, type and
percent of contaminants; also, comparison to new fluid and recommendations.
Following the above guidelines will prevent premature failure of pumps, cylinder seals, drive
motors, and unnecessary downtime.
If system flushing and replacement of fluid is recommended, refer to the flushing procedure.
To Next Page
Loading...
