Graco 26D000, Operation, Repair, And Parts

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Troubleshooting
20 3A8503C
Troubleshooting
1. Follow Pressure Relief Procedure , page 15,
before checking or repairing pump.
2. Check all possible problems and causes before
disassembling pump.
NOTE: For additional troubleshooting information, go to
help.graco.com and search for E1 Transfer Pumps.
Maintenance
Monthly
Electrical connections can loosen over time due to
transporting equipment and normal operation.
Periodically check all electrical connections and tighten
as needed.
Daily
Check the clamp nut (DN) on a daily basis and tighten if
necessary.
Problem Cause Solution
The pump fails to operate Clogged fluid hose or valve Clear the hose or valves.
The pump operates, but the output is
low on both strokes
Clogged fluid hose or valve Clear the hose or valves.
Exhausted fluid supply Refill the fluid supply and reprime the
pump.
Worn or damaged valves or seals Service the valves or seals.
The pump operates, but the output is
low on the down stroke
Held open or worn intake valve Clear or service the valve.
Worn or damaged valves or seals Service the valves or seals.
The pump operates, but the output is
low on the upstroke
Held open or worn piston valve Clear or service the valve.
Worn or damaged valves or seals Service the valves or seals.
Erratic or accelerated operation Exhausted fluid supply Refill the fluid supply and reprime the
pump.
Pump slowly moves after fluid
shutoff in the down stroke
Clogged or dirty intake valve check
ball
Clean ball and seat.
Worn or damaged valves or seats Install repair kit.
Pump moves slowly after fluid
shutoff in the upstroke
Clogged or dirty piston ball or seat Clean ball and seat.
Worn or damaged valves or seats Install repair kit.