Graco 308-017 warranty Service, Required Tools, Disconnecting the Displacement Pump

SERVICE

REQUIRED TOOLS

STorque wrench

SBench vise, with soft jaws

SHammer

SRubber mallet

S13 mm (1/2”) dia. brass rod

SO-ring pick

S11 mm, 12 mm, 19 mm, 22 mm, 26 mm, and 28 mm open-end wrenches

S17 mm box or socket wrench

S32 mm crow’s-foot wrench

S400 mm adjustable wrench

SSet of adjustable wrenches

SThread lubricant

SAnaerobic thread sealant

DISCONNECTING THE DISPLACEMENT PUMP

WARNING

KEEP HANDS AND FINGERS AWAY FROM THE PRIMING PISTON DURING OPERA TION AND WHENEVER THE PUMP IS CHARGED WITH AIR to reduce the risk of injury! On the pump down- stroke the priming piston extends beyond the intake cylinder to pull the material into the pump. The prim- ing piston works under extreme force. During opera- tion and whenever the pump is charged with air, the priming piston can severely injure or amputate a hand or finger, or break a tool, caught between it and the intake cylinder. Always follow the Pressure Re- lief Procedure Warning on page 8, before check- ing, clearing, cleaning, flushing or servicing any part of the pump.

RECONNECTING THE DISPLACEMENT PUMP

1.Orient the pump’s fluid outlet to the air motor’s air in- let as was noted in step 2 under Disconnecting the Displacement Pump. Position the displacement pump (107) on the tie rods (102). See Fig 3.

NOTE: If you removed the tie rods (102) from the air mo- tor (101) or air motor adapter plate, reinstall them using an 11 mm wrench. Torque the rods to 20-25 N.m (15-18 ft-lb) on President pumps, and 36-45 N.m (27-33 ft-lb) on all other pumps.

2.Screw the locknuts (106) onto the tie rods (102) and torque to 27-34 N.m (20-25 ft-lb), using the wrench provided (or a 17 mm box or socket wrench).

3.Place the coupling nut (104) on the displacement rod, then place the coupling collars (105) in the nut. Screw the coupling nut onto the connecting rod (103) loosely. Hold the connecting rod flats with a wrench to keep it from turning. With an adjustable wrench, torque the coupling nut to 50-61 N.m (37-45 ft-lb).

4.Using a torque wrench in the square hole of the supplied wrench (110), torque the packing nut (2) to 45-53 N.m (33-39 ft-lb).

5.Mount the pump and reconnect all hoses. Reconnect the ground wire if it was disconnected during repair. Turn on the air and run the pump slowly.

6.Fill the packing nut/wet-cup 1/3 full of Graco Throat Seal Liquid or compatible solvent.

The air motor piston (located behind the air motor plates or shield) also moves when air is supplied to the motor. NEVER operate the pump with the air motor plates or shield removed. Before servicing the pump, follow the Pressure Relief Procedure Warning on page 8, to prevent the pump from start- ing accidentally.

1.Flush the pump if possible. Stop the pump at the bot- tom of its stroke. Follow the Pressure Relief Proce- dure Warning on page 8.

2.Disconnect the air hose. Hold the fluid outlet fitting

(8) with a wrench to keep it from being loosened while you disconnect the fluid hose. Remove the pump from its mounting. Note the relative position of the pump’s fluid outlet to the air motor’s air inlet.

3.Using an adjustable wrench, unscrew the coupling nut (104) from the connecting rod (103). Remove the coupling collars (105). See Fig 3.

4.Hold the tie rod flats with a wrench to keep them from turning. Use the wrench provided with the pump (or a 17 mm box or socket wrench) to unscrew the tie rod locknuts (106) from the tie rods (102). Carefully pull the displacement pump (107) off the air motor (101).

5.Refer to page 10 for displacement pump service. To service the air motor, refer to the separate air motor manual, supplied.

103

105

104

TORQUE TO 50-61 N.m (37-45 ft-lb)

110

8

107

Fig 3

101

111

102

TORQUE TO 20-25 N.m

(15-18 ft-lb)

ON PRESIDENT PUMPS;

36-45 N.m

(27-33 ft-lb) ON ALL OTHER PUMPS

2

TORQUE TO 45-53 N.m (33-39 ft-lb)

106

TORQUE TO 27-34 N.m (20-25 ft-lb)

MODEL 222-768

PRESIDENT PUMP SHOWN

0424


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