Graco Magnum ProX7, Repair And Parts Manual

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Advanced Troubleshooting
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Advanced Troubleshooting
See Basic Troubleshooting first, page 13 for problems that are more easily remedied.
General Problem: Motor Does Not Operate
Specific Problem Cause Solution
Power switch is on and sprayer
is plugged in; pump does not
cycle. See Basic Troubleshooting ,
page 13.
Basic mechanical problems. Paint is frozen or hardened in
pump. Unplug sprayer from electrical outlet.
If paint is frozen in sprayer
:
Do NOT try to start sprayer until completely
thawed or you may damage the motor, control
board, and/or drivetrain.
1. Turn power switch OFF.
2. Place sprayer in warm area for several hours.
3. Plug sprayer in.
4. Turn power switch ON and flush sprayer with
water or mineral spirits.
a. Turn on sprayer.
b. Turn prime valve to PRIME position.
If paint hardened in sprayer
:
ProX7 and ProX9:
Replace pump packings. See
List of Kits
, page 28.
X5 and X7:
Replace complete pump. See
List of
Kits
, page 28.
Remove all residue from inlet and outlet valves.
Gears are damaged. Remove motor enclosure and rotate motor fan to
check for bad gears. If gears bind or slip, remove
pump cover and replace failed gears. See
List of
Kits , page 28.
ProX7 and ProX9:
Yoke is
broken because pump is
locked up due to dried paint or
worn packings.
Repair or replace using
Gear/Yoke Kit
. See
List
of Kits
, page 28.
Replace pump packings on ProX7 and ProX9
sprayers. See
List of Kits , page 28.