AIRLESSCO MP400 - Manual (Page 16)

Maintenance
16 332882A
Servicing the Inlet Valve - Hi-Boy
1. Relieve Pressure, page 10. Disconnect power from
unit.
2. Un-thread and remove suction nut from the fluid
pump body (8).
3. Remove suction seat assembly (12).
4. Clean all parts and inspect them for wear or dam-
age, replacing parts as needed.
5. Clean inside of the fluid pump body (8).
6. Reassemble lower suction valve assembly by plac-
ing the suction seat assembly (12) in the suction nut
(13) and screw onto fluid pump body (8).
Servicing the Inlet Valve - Stand
1. Relieve Pressure, page 10. Disconnect power from
unit.
2. Un-thread and remove suction nut from the fluid
pump body (8).
3. Remove O-ring (158), suction seat assembly (157),
O-ring (159) and backup ring (160).
4. Clean all parts and inside fluid body (8).
5. Reassemble inlet valve with O-ring (159), backup
ring (160) and O-ring (158).
6. Tighten suction nut using packing adjustment tool
(865008).
Packing Replacement
Procedures
Disassembly of the Fluid Pump
1. Disconnect the Fluid Pump, page 14.
2. Unscrew and remove the packing nut, with wet cup
cap.
3. Push the piston rod down through the packings and
out of the pump.
4. Push the packing removal tool up through the pump
and remove from the top, bringing packings, spacer
and springs along with it, leaving fluid body empty.
Make sure all old packings and glands have been
removed from fluid pump.
5. Clean inside of fluid body.
6. Disassemble all parts and clean for reassembly.
Discard any old packings.
7. Lubricate leather packing in lightweight oil for 10
minutes prior to reassembly.
Reassembly of the Fluid Pump
1. Place lower male gland (1) down on the flat side.
2. Take three of the lower polyethylene packings (2)
and two of the leather packings (23) and place onto
the male gland (1), with the inverted side down, in
the following order:
•
Polyethylene
• Leather
• Polyethylene
• Leather
• Polyethylene
3. Take the female adaptor (3), which is inverted on
both sides, and place it on top of your assembled
lower packings.
4. Follow step 2 with your packings inverted side up.
5. Take the second lower male gland (1) and place it
on top of your assembled packings with rounded
side down.
6. Take assembled glands and packings (13 pieces)
and slide onto the lower half of the piston (14).
7. Take the spacer (15) and slide over the top of the
piston (14).
8
9
10
11
12
13
159
160
157
158
ti16056b
Stand Model