Graco USP Instructions Manual page 4

Purging Air From System
Purging Air From System
Before machine operation is resumed and/or following
maintenance or repair procedures, manual system air
purging is required.
Purging Air from Pump to USP Valve Lines
F . 3
IG
Steps 1- 3, refer to F . 3.
IG
1. Install the line from the system pump to the USP
valve. Do not completely tighten the connection at
the valve's lube inlet.
2. Cycle the system pump until air-free lubricant is
observed flowing from the line at the valve's lube
inlet.
3. Tighten the fitting at the lube inlet port while lubri-
cant is still flowing.
The system is now ready for operation.
4
Purging Air After Adding or Replacing a
USP Valve Module
F . 4
IG
Steps 1- 7, refer to F
1. Install the new USP valve assembly.
2. Connect the tubing or hoses to the appropriate
valve or lubrication point(s)
3. Do not completely tighten the connection(s) at the
ti13745
inlet or at lubrication points.
4. Disconnect and remove the line from the pump at
the valve inlet.
5. Attach a hand pump filled with clean, filtered lubri-
cant to the inlet port.
6. Operate the hand pump until air-free lubricant is
observed flowing from each lube inlet connector
and/or each lubrication point's connector.
7. Tighten the inlet fitting or at the lubrication port while
lubricant is still flowing.
8. Remove the hand pump and reconnect the system
pump to the valve inlet.
. 4.
IG
3A3116B