Repair; Pressure Relief Procedure; Replace Complete Air Valve - Graco Husky 1050HP Repair Parts

Repair

Repair
Repair Repair
Pressure Relief Relief Procedure Procedure
Pressure Pressure Relief Procedure
Follow the Pressure Relief Procedure
whenever you see this symbol.
This equipment stays pressurized until pressure
is relieved manually. To help prevent serious
injury from pressurized fluid, such as splashing
in the eyes or on skin, follow the Pressure Relief
Procedure when you stop pumping and before you
clean, check, or service the equipment.
1. Shut off the air supply to the pump.
2. Open the dispensing valve, if used.
3. Shift the High/Low pressure lever back and forth
two times. Leave the lever in the "Low" position
as shown in Fig. 1.
Figure 1 High/Low Pressure Lever
4. Open the fluid drain valve (installed on the
system) to relieve all fluid pressure. Have a
container ready to catch the drainage.
10
Replace Complete Complete Air
Replace Replace Complete
Follow these instructions to install Air Valve
Replacement 24W897.
1. Stop the pump. Follow the Pressure
Procedure Procedure Procedure in the previous section.
2. Disconnect the main air line.
3. Remove four screws (217). Remove the air valve
(212). Remove the six o-rings (208, 209, and
210).
4. To repair the air valve, go to Disassemble
Air Valve Valve, step 2, in the next section. To install a
Air Air Valve
replacement air valve, continue with step 5.
5. Install the new o-rings (208, 209, and 210) on
the High/Low manifold, then attach the air valve.
Apply thread lubricant and torque screws (217)
to 80 in-lb (9 N•m).
6. Reconnect the main air line.
Air Valve Valve
Air Valve
Pressure Relief Pressure Relief Relief
Disassemble the Disassemble the the
334390E