Graco XP70s-hf 577222 [50/86] Maintenance

Graco XP70s-hf 577222 [50/86] Maintenance
Maintenance
50 3A6283H
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 your Xtreme lower pump
manual for instructions.
Spray gun handle filter; see your spray gun manual.
Seals
Once a week, check and tighten throat seals on both
pumps (see table for torque specifications). Follow the
Pressure Relief Procedure procedure on page 43 prior
to tightening seals. There must be zero pressure on the
pumps when adjusting.
Cleaning Procedure
1. Ensure all equipment is grounded. See Grounding,
page 24.
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.
4. Flush mixed material. Follow the complete Flushing
procedure starting on page 44.
5. Follow the Overnight Shutdown procedure on
page 48. Turn off all power.
6. Clean the external surfaces only using a rag soaked
in solvent that is compatible with the spray material
and surfaces being cleaned.
7. 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 Models table on page 10 for the correct
pump sizes.
2. Remove and replace pump. See Remove XP
Displacement Pump page 56.
3. Adjust the position of the air motor. See
Recirculation Manifold with Over Pressure
Relief Valves page 57.
4. If changing from one type of XPs-hf system to
another (for example - changing from XP50s-hf
to XP70s-hf or from XP70s-hf to XP50s-hf):
Remove the existing over pressure relief
valves (702) and install the correct valves for the
new system type. See Replace Over Pressure
Relief Valves on page 58, and Material
Recirculation Manifold Replacement Table on
page 59.
5. Change the XP-hf Motor Air Pressure Relief
Valve (CG) as required, depending on the ratio. See
page 21.
Pump Size Torque Specification
All
25-30 ft-lb (34-41 N•m)

Содержание

Скачать