Graco XP70 Instructions

Troubleshooting
3A0420V 37
Pump Troubleshooting
This chart uses proportioning fluid gauges to determine pump malfunctions. Observe the gauge readings during the
stroke direction indicated by the bold arrow, and immediately after closing the gun or mix manifold. Refer to other
manuals to troubleshoot individual components.
Fluid outlet pressure gauges split
only at the top changeover (if one
gauge drops the other will rise).
Not fully loading one side on
upstroke.
Increase feed pressure on side that
dropped.
Increase feed hose size.
Clean inlet strainer or hopper screen.
Air mixed in fluid from excessive agi-
tation or circulation.
Flush and add new fluid.
Problem Cause Solution
TROUBLE AREA:
Resin Pump Leakage
1. Throat packing
2. Piston packing
3. Piston ball check
Resin
Pump
Falling Rising
Hardener
Pump
FallingFalling Rising Rising
TROUBLE AREA:
Hardener Pump Leakage
1. Throat packing
2. Piston packing
3. Piston ball check
TROUBLE AREA:
Resin Pump Leakage
1. Throat packing
2. Intake ball check
TROUBLE AREA:
Hardener Pump Leakage
1. Throat packing
2. Intake ball check
Resin
Pump
Hardener
Pump
FallingRising
Resin
Pump
Hardener
Pump
Resin
Pump
Hardener
Pump
r_258914_3a0420a_11a r_258914_3a0420a_11a
r_258914_3a0420a_10ar_258914_3a0420a_10a

Graco XP70 Specifications

General

Fluid Output	2.0 gpm (7.6 lpm)
Fluid Delivery	2.0 gpm (7.6 lpm)
Maximum Fluid Working Pressure	7250 psi (500 bar)
Maximum Air Input Pressure	100 psi (7 bar)
Fluid Outlet Size	3/8 in npsm(m)
Wetted Parts	Stainless Steel, PTFE, UHMWPE
Maximum Pressure	7250 psi (500 bar, 50 MPa)
Hose Length	50 ft