Service manual

Clean or replace Prime Valve (100-180).

1. Tighten Packing Nut. See pg 21

2. Repack unit. See pg 20-21

Replace Spray Tip.

Repack unit.

Replace Piston.

Replace Outlet seat and ball.

See electrical troubleshooting on page 29.

Note: Check everything in the Troubleshooting Chart before disassembling the sprayer.

FLUID PUMP DISCONNECT

1. Flush out the material you are spraying, if possible.

2. Follow the Pressure Relief Procedure on Page 6. Stop the pump in the middle of down stroke.

3. Remove the suction tube and uid hose (if so equipped) from the uid pump.

4. Remove 2 retaining rings and slip the sleeve of the coupling down and remove both coupling halfs.

This will disconnect uid pump from the connecting rod.

5. Unscrew the two tie rod locknuts.

6. Pull the pump off the tie rods.

FLUID PUMP REINSTALL

1. Loosen the packing nut and extend piston rod to fully up position. Slip sleeve (189-047)

over the piston rod.

2. Make sure that spacer tubes (301-048) are in place.

3. Connect connecting rod with uid pump by installing coupling halfs (189-046). Slide sleeve over

coupling halfs. Secure with retaining ring (189-048).

4. Secure the uid pump housing to the tie rods (100-328) and screw locknuts with washers on loosely.

5. Tighten the tie rod locknuts evenly to 30 ft. lb.

NOTE: After all the rod locknuts are tight, the alignment of both rods should allow easy assembly and dis-

assembly of the coupling. If any binding, loosen and retighten all the rod locknuts to improve the alignment.

Misalignment causes premature wear of seal and packings.

6. Tighten the packing nut clockwise until resistance against the packings can be felt. Turn it 1 full turn

more.

7. Start the pump and operate it slowly (at low engine speed) to check the piston rod for binding. Adjust

tie rod lock nuts if necessary to eliminate binding.

8. Prime the unit and run at maximum pressure for several minutes, then release the pressure and

repeat step 6.

9. Fill the wet cup (packing nut) about 1/3 full of TSO (Throat Seal Oil)

SERVICING FLUID PUMP