Pressure Relief Procedure - Graco A Series Instructions-Parts List Manual

Repair - Models 24J088 and 24J089 Only
Repair - Models 24J088 and 24J089 Only
The following instructions are for models 24J088 and
24J089 only. Instructions for model 24J090 begin on
page 9.
Reference numbers used in the following instructions
refer to parts page 20.

Pressure Relief Procedure

Follow the Pressure Relief Procedure when-
ever you see this symbol.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection, splashing fluid
and moving parts, follow the Pressure Relief Procedure
when you stop pumping and before cleaning, checking,
or servicing the equipment.
1. Close the bleed-type master air valve.
2. Open the dispensing valve, if used.
3. Open all fluid drain valves (N) in the system, having
a waste container ready to catch drainage. Leave
drain valve(s) open until you are ready to spray
again.
Replace the Throat Packings Without
Disconnecting the Lower
NOTE: Throat packing kits are available. See page 22.
Kit parts are marked with a symbol, for example (19†).
1. Flush the pump, if possible.
2. Stop the pump at the middle of its stroke.
3. Relieve the pressure.
4
4. Unscrews the coupling nut (a) from the motor shaft.
Lift the motor shaft and remove the coupling nut (a)
and collars (b) (F . 1).
IG
F . 1
IG
5. Remove the o-ring (35), glands (19, 26), packings
(20, 25) (F . 2).
IG
NOTE: Inspect the surface of the piston rod (17). If it is
scratched, replace the piston rod.
25
20
F . 2
IG
b
a
35
19
20
26
25
19
3A2023C