Instruction manual

Maintenance

3A1188A 15

Servicing Valve Assemblies

Disassembly of the Outlet Valve

1. Remove Fluid Pump from machine. See Fluid Pump

Removal, page 12

2. Remove Outlet Valve Assembly. See Disassembly

of the Fluid Pump, page 13.

3. Unscrew piston valve (14) from piston rod (8). Clean

and inspect parts. The piston has a special thread

locking/sealing patch. The patch allows for disas-

sembly/assembly procedures before it is necessary

to apply Loctite

to the threads.

4. Remove packing glands from piston rod. Note orien-

tation for installation.

5. Clean and inspect parts for wear or damage,

replace parts as necessary. PTFE O-ring will always

be replaced in this procedure.

Reassembly of the Outlet Valve

1. Mount piston in vise.

2. Place ball into piston.

3. Install packings, wiper and glands. See Packing

Replacement Procedures, page 16.

4. Apply Loctite

to valve seat threads, if special

thread locking/sealing patch is insufficient. (Nor-

mally good for 4 repacks.)

5. Torque valve seat into piston to 55 ft-lbs.

Disassembly of the Inlet Valve

1. Relieve pressure, see page 6.

2. Disassemble intake valve. Clean and inspect O-ring.

You may need to use a pick to remove O-ring.

Reassembly of the Inlet Valve

1. Reinstall inlet parts in correct order. Reverse inlet

seat if necessary.

2. Run the machine at pressure for several minutes,

inspect for leaks and proper orientation.

ti8850a

ti8851a

ti16102a