Repair
309577T 9
Fill the Wet-Cups
1. Component A (ISO) Pump: Keep reservoir (R) 3/4
filled with Graco Throat Seal Liquid (TSL), Part No.
206995. Wet-cup piston (28) circulates TSL through
packing nut/wet-cup (19), to carry away isocyanate
film on displacement rod.
After some time TSL will thicken and darken, and
must be replaced. Thick, dirty TSL will not pump
through lines and will harden in wet-cup. Check
condition of TSL every week, minimum, and change
when needed.
2. Component B (Resin) Pump: Check felt washers
(21) in packing nut/wet-cup (19) daily. Keep
saturated with Graco Throat Seal Liquid (TSL), Part
No. 206995, to prevent material from hardening on
displacement rod. Replace felt washers when worn
or contaminated with hardened material.
Tools Needed
• Vise with flat jaws
• 12 in. adjustable, open end wrench (2)
• Non-sparking hammer, 20 oz maximum
• Small screwdriver
• Throat Seal Liquid (TSL), Graco Part No. 206995
• ISO Pump Oil, Graco Part No. 217374
• Pick or long small screwdriver
• Snap-ring pliers
• 1/2 in. (13 mm) diameter plastic rod
• 7/8 in. deep-well socket (246830 and 245970 only)
• 1/2 in. (13 mm) x 2.5 in. (64 mm) bolt with washers
and nut
• Channel locks
• Dropcloth and rags
Repair Kits
A repair kit is available for your pump. Kit parts are
marked with an asterisk, for example (3*). See page 22.
Kit must be purchased separately. For best results, use
all parts in the kit.
Clean and Inspect Parts
1. Clean and inspect all parts. Intake and piston ball
seats, sleeve, and displacement rod must not be
worn, scratched, or damaged.
2. Remove and clean sleeve when repacking pump.
Pump rod and connecting rod move during operation.
Moving parts can cause serious injury such as pinch-
ing or amputation. Keep hands and fingers away from
wet-cup during operation.
Turn main power OFF before filling wet cup.
R
TI3765a
19
TI3765a
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