Packing Replacement Procedures

Replacement Instructions:

Fluid Pump Removal - Refer to Figure 1

1.Follow the Pressure Relief Procedure on page 9.

2.Flush material you are spraying out of the machine.

3.Remove the connecting rod shield (331-111).

4.Move the piston rod (331-093) to its lowest position by cycling pump slowly.

5.Remove the retaining ring (331-062) from the connecting rod (331-038) and slide the sleeve (331-117) down revealing the connecting rod pin (331-065).

6.Remove the suction tube assembly from the fluid pump (331-209) by unscrewing the suction nut (331-034) with the packing adjustment tool.

7.Using a 1/2” wrench unscrew the two bolts (100-318) from the cover assembly (331-234). The fluid pump (331-209) will be hanging loosely at this point.

8.Remove the connecting rod pin (331-065) out of the connecting rod (331-038), allowing the removal of the fluid pump (331-209) from the machine.

Disassembly of the Fluid Pump - Figure 6

1.Unscrew & remove the packing nut (331-037).

2.Push the piston rod (331-708) down through the packings

&out of the pump.

3.Now push the packing removal tool (331-465) up through the pump & remove from the top bringing packings, spacer

&springs along with it, leaving fluid body (331-011) empty.

*Make sure all old packings & glands have been removed from fluid pump.

4. Clean inside of fluid body (331-011).

5.Disassemble all parts & clean for reassembly. Discard any old packings.

6.Lubricate leather packing in lightweight oil for 10 minutes prior to reassembly.

Disassembly of the Outlet Valve - Figure 3

1.Place piston holder (331-195) in a vise. Slide piston into the holder & lock in place with a 3/8” dowel.

2.Use a 1/4” allen wrench to unscrew the outlet seat retainer (331-026) from the piston.

3.Remove the outlet seat (331-026), O-ring (331-100) and outlet ball (331-027).

4.Inspect outlet ball & seat for wear. Replace as necessary.

5.While piston is still locked in the holder, install parts back into the piston in the following order:

ball, outlet seat and O-ring

Before reinstalling the outlet seat support, apply two drops of Loctite No. 242 (blue) on the threads & torque to 20 ft-lbs.

REASSEMBLY - Figure 5 & 6

1.Take lower male gland (331-014) & place it down on the flat side.

2.Take three of the lower polyethylene packings (331-016) & two of the leather packings (331-306) & place onto the male gland in the following order with the inverted side down :

Polyethylene, leather, polyethylene, leather, polyethylene.

3.Take the female adaptor (331-305), which is inverted on both

sides

, & place it on top of your assembled lower packings.

4.Follow step 2 above with your packings inverted side up.

5.Take the second lower male gland and place it on top of your assembled packings with the rounded side down.

6.Take assembled glands & packings (13 pieces) & slide on to the lower half of the piston.

7.Take the spacer (331-018) & slide over the top of the piston (it doesn’t matter which direction it sits), falling onto lower packings.

8.Take three Belleville Springs (331-025) & slide over the top of the piston in the following order:

* First spring, curve facing down (

*Second spring, curve facing up (

*Third spring, curve facing down (

9.Take the upper male gland (331-022) & place it rounded side up.

10.Take three upper polyethylene packings (331-023) & two leather

packings (331-307) & assemble with inverted side down	,
on to the male gland in the following order:
polyethylene, leather, polyethylene, leather, polyethylene.

11.Take upper female gland (331-021) & place on top of the assembled upper packings with the inverted side down.

12.Take assembled upper glands & packings (7 pieces) & slide on over the top of the piston, making sure inverted sides are down.

13.Take the packing holder (331-019) & replace the white O-ring (106-009) & the black O-ring (106-010) with new ones from the packing kit.

14.Slide the packing holder over the top of the upper packings so they fit inside.

15.Lubricate inside of the fluid pump body & the outside of the packings with a light weight oil.

16.Slide completed assembly into fluid pump body (331-011).

* To keep packings secured in correct position, hold the pump body upside down & push the completed assembly upwards into the pump body. Once placed inside, tilt pump body back up to keep all pieces in.

17.Tighten packing nut (331-037) onto the top of the fluid pump body & tighten until you feel slight resistance against the Belleville Springs (331-025). Using the Packing Adjustment Tool (189-211), tighten another 3/4 of a turn.

Fluid Pump Reinstallation - Figure 1 & 4

1.Loosen packing nut & ensure that the piston rod (331-093) is in its upper position in the fluid pump body (331-011). Slip the sleeve (331-117) & the retaining ring (331-062) over the piston rod.

2.Push piston rod up into the connecting rod (331-038) & align the holes. Insert the connecting rod pin (331-065) through the connecting rod & piston. Slip the sleeve up over the connecting rod pin & insert retaining ring into the groove on the connecting rod.