Hitachi 236464 manual Displacement Pump Service, Disassembly

Page 16

Service

DISPLACEMENT PUMP SERVICE

Disassembly

When disassembling the pump, lay out all the removed parts in sequence, to ease reassembly.

NOTE: Packing Repair Kits are available. For the best results, use all the new parts in the kit. Kit parts are marked with an asterisk, for example (3*). You can also convert the pump to different packing materials. Refer to page 24.

1.Place the pump lengthwise in a large vise, with the jaws on the outlet housing (6) as shown in Fig. 5. Using the supplied wrench (110), loosen, but do not remove, the packing nut (8).

2.Using a 2–3/4 in. socket or a pipe wrench, un- screw the intake valve (5) from the intake housing (7). Be careful to catch the intake ball (13) as you remove the intake valve, so that it does not fall and suffer damage. Remove the seal (30) from the intake valve. Inspect the ball and the seat (D) of the intake valve for wear or damage.

3.Using a pipe wrench, remove the intake housing (7) from the cylinder (2).

NOTE: These instructions are written with the pump separating at joint A. If it separates at joint B, disas- semble it at that joint, place the intake housing (7) in a vise, and continue with step 4.

4.Using a pipe wrench, unscrew the cylinder (2). The displacement rod (1) may come with the cylinder.

 

 

D

5 3

 

1

7

 

6

2

 

 

1

 

2

 

 

 

 

 

 

30*

 

 

 

13*

 

 

 

2

 

 

 

A

1

 

 

B

 

 

 

8

1 Torque to 325–353 NSm (240–260 ft-lb).

2 Lubricate.

3 Torque to 190–217 NSm (140–160 ft-lb).

04492A

Fig. 5

16 308350

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Contents
Instructions Parts List Dura-Flot600 PumpsTable of Contents List of ModelsSymbols Equipment Misuse HazardInjection Hazard Moving Parts HazardFire and Explosion Hazard Toxic Fluid Hazard308350 Installation System AccessoriesGeneral Information Grounding Object being sprayed follow your local codeAir Line Accessories Typical Installation KEYOperation/Maintenance Pressure Relief ProcedurePacking Nut/Wet-Cup 110Starting and Adjusting the Pump Flush the Pump Before First Use Shutdown and Care of the Pump FlushingIts stroke keep the wet-cup 1/3 filled with a Troubleshooting ChartCompatible solvent Service Disconnecting the Displacement PumpReconnecting the Displacement Pump Required Tools101 105 108 107 106 110 109Displacement Pump Service DisassemblyTorque to 258-285 NSm 190-210 ft-lb Reassembly 10 Ref 11 Ref Install the seal 11* on the bottom Housing 7 onto the cylinder handtight.Sealing surface of the intake housing Using a pipe wrench, torque the intake housing101 105 108 109 102Y 107 106 110 Parts102Y 107 106 110 Part No Pump, Series a 251 Ratio, with Senator Air Motor 101 105 108 109102Y 107 110 106 112 113Throat Packing Stack see Piston Packing Stack SeePacking Kits Teflonr Packing Kit 237236 OptionalUHMWPE/Leather Packing Kit 237238 Optional UHMWPE/PTFErPacking Kit 237609 OptionalTechnical Data Tested in accordance with ISOLiters/min 11.4 Dimensions Mounting Hole LayoutGraco Standard Warranty Graco Information
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