Graco 308149P Displacement Pump Disassembly, Service, Intake Check Valve

Page 19
Displacement Pump Disassembly

Service

Displacement Pump Disassembly

When disassembling the pump, lay out all the removed parts in sequence, to ease reassembly. Clean all parts with a compatible solvent and inspect them for wear or damage. Refer to Fig. 10.

NOTE: Repair Kit 222860 is available to replace the packings and seals. Parts included are denoted with an asterisk, for example (7*). Repair Kit 222974 is available to repair the intake valve. Parts included are denoted with a symbol, for example (10{). For the best results, use all the new parts in the kits. Conversion Kit 222861 is available to convert the pump to all PTFE v-packings, and Conversion Kit 222862 is available to convert to leather v-packings. See page 29.

1.

Remove the displacement pump from the air motor

 

as explained on page 16.

2.

Hold the flats of the priming piston rod (12) with an

 

adjustable wrench, and use a second wrench to

 

unscrew the priming piston nut (14) from the rod.

 

Slide the priming piston (15) and guide (13) off the

 

rod. Inspect the outer surface of the guide (13) and

 

the inner and outer surfaces of the piston (15) for

 

scoring, wear, or other damage.

3.

Stand the pump upright in a vise. Loosen the

 

packing nut (2) using the packing nut wrench (104)

 

supplied, or a hammer and brass rod. Using a

 

socket wrench, remove the six capscrews (32).

4.

Tap the underside of the outlet housing (19) with a

 

rubber mallet to loosen the housing from the

8.Place the flats of the displacement rod (1) in a vise. Using a 13 mm (1/2 in.) diameter brass rod, pry the intake check valve assembly away from the rod guide (18) far enough to apply wrenches to the valve assembly. See Fig. 7.

INTAKE CHECK VALVE

12

10

9

18

1

113 mm (1/2 in.) Diameter Brass Rod.

6

01171

Fig. 7

9.Hold the valve body (10) steady with a wrench on the flats. Using an adjustable wrench, loosen the intake packing nut (9) to decrease tension on the priming piston rod (12). Now slide the intake valve assembly off the rod and set it aside. See Fig. 8.

cylinder (4). Lift the outlet housing off the pump

and set it aside. Be careful not to scratch the

displacement rod (1) while removing the housing.

Remove the seal (39) from the top of the cylinder.

5. Lift the cylinder (4) up off the intake housing (17).

The displacement rod (1), piston assembly, intake

valve assembly, and priming piston rod (12) will

come with the cylinder.

6. Place the cylinder (4) sideways in a vise with soft

jaws. Using a rubber mallet on the end of the

priming piston rod (12), drive the displacement rod

12

1 3

1

2 3

Hold valve body (10)

steady.

(1) and piston assembly out the top of the cylinder.

Continue to pull the rod out of the cylinder until the

2

Loosen intake

packing nut (9).

 

priming piston rod (12) comes free.

7. Remove the seal (39) from the bottom of the

cylinder (4). Hold the cylinder up to the light at an

angle to examine the inside surface for scoring or

damage.

3

Fig. 8

When reassembling items 9 and 10, torque to 97–106 N.m (71–78 ft–lb).

See page 22.

01172

308149 19

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Contents Part No. 246935 Pump, Series A Instructions - Parts ListCARBON STEEL Part No. 222828 Pump, Series ATable of Contents EQUIPMENT MISUSE HAZARD SymbolsWarning Symbol Caution SymbolMOVING PARTS HAZARD SKIN INJECTION HAZARDTOXIC FLUID HAZARD FIRE AND EXPLOSION HAZARDPage Grounding InstallationInstallation AIR-POWEREDPUMPSFluid Line Accessories SYSTEM ACCESSORIESMounting Accessories Air Line AccessoriesInstallation HYDRAULIC-POWEREDPUMPSFluid Supply Hoses FiltersHydraulic Lines Hydraulic Motor Drip PanPacking Nut/Wet-Cup ALL MODELS Pressure Relief ProcedureAIR-POWEREDMODELS Starting and Adjusting the Pump OperationOperation AIR-POWEREDMODELSShutdown and Care of the Pump Model 222835 ShownShutdown and Care of the Pump HYDRAULIC-POWEREDMODELSStarting and Adjusting the Pump OperationSOLUTION TroubleshootingCAUSE Disconnecting the Displacement Pump ServiceRequired Tools Viscount Pumps ServiceKing, Bulldog, and Premier PumpsService Reconnecting the Displacement Pump308149 Displacement Pump DisassemblyService INTAKE CHECK VALVEService DETAIL OF PISTON CHECK VALVE Service4Remove and clean plug THROAT PACKING DETAILService ReassemblyPISTON CHECK VALVE ServiceTHROAT PACKING DETAIL DETAIL OFService Model 246935 Pump, Series A PartsModel 222828 Pump, Series A Model 222829 Pump, Series A24 1 Ratio, with Quiet King Air Motor Model 222835 Pump, Series BModel 222901 Pump, Series B Model 246936 Pump, Series A222800 Parts0919A Displacement PumpModel 222810, Series B Model 246934, Series A PartsDisplacement Pump PTFE Packing Conversion KitLeather Packing Conversion Kit Ink Pump Conversion KitModel 222828 and 246935 Bulldog Pump Technical DataTechnical Data Model 222829 Quiet Bulldog PumpTechnical Data Model 222835 and 246936 King PumpTechnical Data Model 222901 Quiet King PumpTechnical Data Model 222940 Premier Pumpliters/min Model 222902 and 246937 Viscount PumpTechnical Data liters/minPump Model DimensionsModel 222835 Shown B A E C DBulldog, King, and Viscount Pumps Mounting Hole LayoutsPremier Pumps Graco Headquarters Minneapolis Graco Standard WarrantyGraco Information FOR GRACO CANADA CUSTOMERS