Graco ti18526c Repair Catalyst Pump, Remove Catalyst Pump from System, Disassemble Catalyst Pump

Repair Catalyst Pump

See FIG. 37 on page 49 for reference numbers.

Remove Catalyst Pump from System

1.Flush the pump, see page 30.

2.Relieve the pressure, see page 24.

3.Close catalyst supply ball valve and disconnect fluid lines.

4.Remove top pivot knob securing catalyst pump to upper control arm.

5.Remove bolt securing catalyst pump to lower con- trol arm then remove catalyst pump.

Disassemble Catalyst Pump

6.Pull pivot knob (929) out to fully extend the slave pump rod (910).

7.Remove quick release pin (908) from slave pump housing (901).

8.Holding the slave pump housing (901) stationary with one hand, use a crescent wrench on the flats of the slave pump cylinder (918) to loosen then remove the cylinder and foot valve (922) assembly.

9.Place the slave pump housing (901) in a vise. Use the flats provided by the quick-release pin (908) hole.

10.Use a crescent wrench on the flats of the cartridge (902) to loosen then remove the cartridge and piston rod (910) assembly.

Repair Throat and Piston Seals

11.Use a wrench on the flats of the piston rod (910) to hold it stationary while using a second wrench on the flats of the transfer housing (914) to loosen then remove the housing and cap (917) assembly.

12.Install bullet tool 16D007 on the piston rod (910) then pull the rod (910) out of the cartridge (902).

NOTICE

Bullet tool 16D007 must be used or damage to the seals will result when removing or installing items onto the rod.

13.Remove snap-on seal retainer (902e) then remove seal (902f).

Repair

14.Use crescent wrench to loosen then remove the bearing (902b) and felt wiper (902d) assembly.

15.Remove seal (902f) from inside of cartridge (902a).

16.Remove o-ring (902g).

17.Install new seal (902f) into bottom of the

cartridge (902a) with the u-cup opening facing into the pump.

18.Install seal (902f) with onto weep seal installation tool 16N967 with u-cup opening facing into the pump then use tool to install seal into inside of cartridge (902a).

19.Install felt wiper (902d) and bearing (902b) into cartridge (902a). Tighten to 20-60 in-lb (2.3-6.8 N•m).

20.Install o-ring (902g).

21.Install snap-on seal (902e).

22.Lubricate the piston rod.

23.With bullet tool 16D007 installed on the piston rod, install cartridge assembly (902) onto the rod.

24.Remove the bullet tool.

25.Use one wrench on the transfer housing (914) and another on the transfer housing cap (917) to break them loose from each other then remove the cap from the housing.

26.Remove seal (915) and guide (916) from transfer housing.

27.Remove spring (911), valve (912), and o-ring (913) from transfer housing.

28.Remove o-ring (913) from the valve (912).

29.Install new o-ring (913) on new valve (912).

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