Graco Manzel MHH [6/28] Purging air from the system
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Graco Manzel MHH [6/28] Purging air from the system

Graco Manzel MHH [6/28] Purging air from the system
Repair
6 312497A
Repair
Purging Air From the System
Before machine operation is resumed following maintenance
or repair, manual system air purging must be performed.
There are several air purging procedures available depending
upon the maintenance or repair procedure.
Section 1: Purging Air from Secondary Divider Valve Lube-to-Lube Point Lines
Steps 1-6, refer to FIG. 6.
1. Install the line from the secondary divider valve to the lube
point, but do not completely tighten the connection at the
lube point.
2. Remove the performance indicator port plug or the
performance indicator from the working valve section on
the secondary divider valve assembly corresponding to
the outlet port and the line connected to the lube point.
3. Attach a hand pump filled with clean, filtered lubricant to
the port on the secondary divider valve that was opened
in Step 2.
4. Operate the hand pump until air-free lubricant is observed
flowing from the line at the lubrication point.
5. Tighten the fitting at the lubrication point while lubricant is
still flowing.
6. Remove the hand pump and reinstall the performance
indicator or indicator port plug removed in Step 2.
CAUTION
• Use only clean oil filtered to the SAE -recommended
cleanliness level of ISO 18/14 (ISO Standard 4406) when
prefilling a system. The manufacturers of the machine
tool and its component bearings should be consulted to
ensure that the ISO 18/14 cleanliness level is adequate.
SECTION/
Page
Air purging after:
1/page 6 Replacing line between a secondary
divider valve and lube point.
2/page 7 Replacing a line between the master
divider valve and a secondary divider
valve.
3/page 8 Replacing a line between pump and
master divider valve.
4/page 9 Adding or replacing any component in a
master divider valve assembly.
5/page 10 Adding or replacing any component in
module in a secondary divider valve
assembly.
FIG. 6
TI11098
MASTER
HAND PUMP
BLEED HOSE
REMOVE INDICATOR
OR PORT PLUG
SECONDARY
LUBE POINT
HERE
If check valves were not installed at the lubrication point,
lubricant may continually drain out of the line when the
secondary port is open. Therefore, when check valves
are not used, the method for bleeding this line is to
tighten the line at both ends and repeatedly cycle the
secondary divider valve via hand pump operation until
lubricant, free of air, flows from the lubrication point.

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