Reassemble The Air Motor And The Pump Lower; Troubleshooting - Graco T2 Instructions Manual

Reassemble the Air Motor and the Pump Lower

To reassemble the pump lower and air motor, reverse
the steps on the preceding pages. Follow the torque
requirements listed in the Parts - Model 295616
drawing on page 22.

Troubleshooting

Problem
The pump fails to operate
The pump operates, but the output
is low on both strokes.
The pump operates, but the output
is low on the downstroke.
The pump operates, but the output
is low on the upstroke.
Erratic or accelerated operation.
Pump slowly moves after fluid
shutoff in downstroke.
Pump slowly moves after fluid
shutoff in upstroke.
311882U
NOTE: See Repair the Air Motor, page 16, step 4 and
step 5 (F
1. Follow Pressure Relief Procedure, page 14,
2. Check all possible problems and causes before
Cause
Dirty or worn air motor.
Inadequate air supply or restricted
lines.
Closed or clogged air valves.
Clogged fluid hose or valve.
Worn or damaged valves or seals.
Clogged fluid hose or valve.
Exhausted fluid supply.
Worn or damaged valves or seals.
Held open or worn intake valve.
Worn or damaged valves or seals.
Held open or worn piston valve.
Worn or damaged valves or seals.
Exhausted fluid supply.
Broken air motor compression
spring.
Clogged or dirty intake valve check
ball.
Worn or damaged valves or seats.
Clogged or dirty lower piston ball or
seat.
Worn or damaged valves or seats.
Reassemble the Air Motor and the Pump Lower
. 12) for special notes on reassembly.
IG
before checking or repairing pump.
disassembling pump.
Clean, service
Clean lines or increase the air
supply (see Technical Data).
Open or clear the valves.
Clear the hose or valves
Service the valves or seals.
Clear the hose or valves.
Refill the fluid supply and reprime
the pump.
Service the valves or seals.
Clear or service the valve.
Service the valves or seals.
Clear or service the valve.
Service the valves or seals.
Refill the fluid supply and reprime
the pump.
Replace the spring.
Clean ball and seat.
Install repair kit.
Clean ball and seat.
Install repair kit.
Solution
21