Graco 233718, Repair Instructions

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309412 6
Troubleshooting
PROBLEM CAUSE SOLUTION
Clutch is worn, damaged, or incorrectly positioned Replace clutch. Manual 309890.
Pinion assembly is worn or damaged Repair or replace pinion assembly. Manual
309890.
Pump output is low. Strainer (89) is clogged Clean strainer. Sprayer 233716 strainer is for
use in paint only.
Piston ball (206) is not seating Service piston ball. Manual 309277.
Piston packings are worn or damaged Replace packings. Manual 309277.
O-ring (227) in displacement pump is worn or dam-
aged
Replace o-ring. Manual 309277.
Intake valve ball is not seating properly Clean intake valve. Manual 309277.
Intake valve ball is packed with material Clean intake valve. Manual 309277. Do not
leave 233716 sprayer under pressure for more
than 5 minutes when spraying texture and not
actively spraying.
Engine speed is too low Increase throttle setting. Manual 309408.
Clutch is worn or damaged Replace clutch. Manual 309890.
Pressure setting is too low Increase pressure. Manual 309408.
Fluid filter (318), tip filter or tip is clogged or dirty Clean filter. Manual 309408 or 309091.
Large pressure drop in hose with heavy
materials
Use larger diameter hose and/or reduce overall
length of hose. Use of more than 100 ft of 1/4
in. hose significantly reduces performance of
sprayer. Use 3/8 in. hose for optimum perfor-
mance (50 ft minimum).
Excessive paint leakage into
throat packing nut
Throat packing nut is loose Remove throat packing nut spacer. Tighten
throat packing nut just enough to stop leakage.
Throat packings are worn or damaged Replace packings. Manual 309277.
Displacement rod is worn or damaged Replace rod. Manual 309277.
Fluid is spitting from gun Air in pump or hose Check and tighten all fluid connections. Re--
prime pump. Manual 309408.
Tip is partially clogged Clear tip. Manual 309091.
Fluid supply is low or empty Refill fluid supply. Prime pump. Manual
309408. Check fluid supply often to prevent
running pump dry.
Pump is difficult to prime Air in pump or hose Check and tighten all fluid connections.
Reduce engine speed and cycle pump as
slowly as possible during priming.
Intake valve is leaking Clean intake valve. Be sure ball seat is not
nicked or worn and that ball seats well. Reas-
semble valve.
Pump packings are worn Replace pump packings. Manual 309277.
Paint is too thick Thin the paint according to the supplier’s
recommendations