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Maintenance
Hose Electrical Resistance
Check electrical resistance of hoses regularly. If total
resistance to ground exceeds 29 megohms, replace
hose immediately.
Filters
Once a week check, clean, and replace (if needed) the
following filters.
•
Both pump filters; see lower manual for instructions.
•
Spray gun handle filter; see spray gun manual.
Seals
Once a week, check and tighten throat seals on both
pumps. See table for torque specifications. Be sure to
follow the Pressure Relief Procedure on page 26, prior
to tightening seals. There must be zero pressure on the
pumps when adjusting.
Pump Size
Torque Specification
All
25-30 ft-lb (34-41 N•m)
Cleaning Procedure
1. Ensure all equipment is grounded. See Grounding,
page 20.
2. Ensure the area where the system will be cleaned is
well ventilated and remove all ignition sources.
3. Turn off all heaters and allow equipment to cool.
3A4381M
4. Flush mixed material. See Flush Mixed Material,
page 34.
5. Perform the Pressure Relief Procedure on page
26.
6. Perform Park and Shutdown procedures, page 39.
Turn off all power.
7. Clean the external surfaces only using a rag soaked
in solvent that is compatible with the spray material
and surfaces being cleaned.
8. Allow enough time for the solvent to dry before
using the system.
Change the Mix Ratio
In order to change the mix ratio, one or both pumps
need to be replaced, the air motor needs to be
re-positioned, and the over pressure relief valves may
need to be changed.
1. Check the Varying Parts table on page 63 for the
correct pump sizes.
2. Remove and replace pump. See Remove
Displacement Pump page 45.
3. Adjust the position of the air motor. See Motor
Position page 22.
4. If changing from one type of XP-hf system to
another (for example - changing from XP50-hf to
XP70-hf or from XP70-hf to XP50-hf): Remove the
existing over pressure relief valves (302) and install
the correct valves for the new system type. See
Replace Over Pressure Relief Valves on page 48.
5. Change the air pressure relief valve (CG) as
required, depending on the ratio.
Maintenance
41
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Table of Contents
Troubleshooting
