Advanced Troubleshooting - Graco LTS 15 Repair And Parts Manual

Advanced Troubleshooting

Advanced Troubleshooting
See Basic Troubleshooting first, page 13 for problems that are more easily remedied.
Specific Problem
Power switch is on and
sprayer is plugged in; pump
does not cycle.
Basic mechanical problems.
18
General Problem: Motor Does Not Operate
Cause
See Basic Troubleshoot-
ing, page 13.
Paint is frozen or hardened in
pump.
Gears are damaged.
ProLTS 17 and ProLTS 19:
Yoke is broken because
pump is locked up due to
dried paint or worn packings.
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 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:
ProLTS 17 and ProLTS 19: Replace pump
packings. See List of Kits, page 28.
LTS 15 and LTS 17: Replace complete pump.
See List of Kits, page 28.
Remove all residue from inlet and outlet valves.
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.
Repair or replace using Gear/Yoke Kit. See List
of Kits, page 28.
Replace pump packings on ProLTS 17 and Pro-
LTS 19 sprayers. See List of Kits, page 28.
313036N