Advanced Troubleshooting; General Problem: Motor Does Not Operate - Graco MAGNUM 232738 Repair Manual

WARNING
Page 4.
Specific Problem
Power switch is on and sprayer
is plugged in; pump does not
cycle
Basic mechanical problems
309477F

Advanced Troubleshooting

General Problem: Motor Does Not Operate

Cause
See Basic Troubleshooting,
page 9
Paint is frozen or hardened in
pump
Motor is damaged
Yoke is broken because pump
is locked up due to dried paint
or worn packings (XR9 only)
Solution
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 OFF power switch
2. Place sprayer in warm area for several
hours
3. Plug in and turn on sprayer
4. Slowly increase pressure until motor starts
If paint hardened in sprayer:
1. Replace pump packings
2. Remove all residue from valves
Pump Service, page 20.
Remove gear and try to rotate motor shaft by
hand. See Motor Diagnostics, page 19. If shaft
will not turn, replace motor using Motor Kit, page
18.
Repair or replace using Gear/Yoke Kit, page 18.
Repair pump, page 20.
Advanced Troubleshooting
11