Servicing The Fluid Section; Servicing The Valves; Repacking The Fluid Section - WAGNER LineCoat 800 Mode D'emploi

Servicing the fluid section

8. Servicing the Fluid Section
Use the following procedures to service the valves and repack the
fluid section.
1. Using a Phillips screwdriver, remove the four front cover
screws. Remove the front cover.
2. Start the engine (refer to the procedures in the Operation
section of this manual). Turn the pressure control knob
clockwise to its maximum pressure setting.
3. Toggle the sprayer ON/OFF switch between the ON and
OFF positions in short bursts until the slider assembly and
piston rod stop at the bottom of their stroke (in their lowest
position).
4. Turn off the engine and perform the Pressure Relief
Procedure.
Before proceeding, follow the Pressure Relief
Procedure outlined previously in this manual.
Additionally, follow all other warnings to reduce the
risk of an injection injury, injury from moving parts
or electric shock.
8.1

Servicing the valves

The design of the fluid section allows access to the inlet valve and seat
as well as the outlet valve and seat without completely disassembling
the fluid section. It is possible that the valves may not seat properly
because of debris stuck in the inlet valve seat or outlet valve seat. Use
the following instructions to clean the valves and reverse or replace
the seats.
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Keep the sprayer in the upright position for this
procedure.
Figure 15
1. Using a wrench, loosen and remove the inlet valve housing (8)
from the fluid section housing (1).
2. Clean out any debris in the inlet valve housing and examine
the valve housing and seat (6). If the inlet valve seat is
damaged, reverse the seat to the unused side or replace the
seat.
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If the inlet valve seat is reversed or replaced, the
inlet valve ball (4) must be replaced.
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2
3
4
5
6
7
8
GB
Figure 16
Always service the outlet valve with the piston rod
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attached to the pump. This will prevent the piston
rod from rotating during disassembly of the outlet
valve.
3. Using a 3/8" hex wrench, loosen and remove the outlet valve
retainer (7) from the piston rod (1).
4. Clean out any debris and examine the outlet valve retainer (7)
and seat (6). If the outlet valve seat (6) is damaged, reverse to
the unused side or replace the seat.
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If the outlet valve seat is reversed or replaced, the
outlet valve ball must be replaced.
5. Remove, clean, and inspect the outlet cage (3) and outlet
valve ball (4). Replace if they are worn or damaged.
6. Reassemble the valves by reversing the steps above.
8.2

Repacking the Fluid Section

1. Remove the foot valve assembly using the steps in the
"Servicing the Valves" procedure, section 8.1.
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The outlet valve does not need to be disassembled
from the piston rod for this procedure.
Figure 17
2. Using 3/8" a hex wrench, loosen and remove the two pump
block mounting screws (5).
3. Pull the pump block down approximately 1/2" from the gear
box housing.
4. Slide the pump block (4) and piston rod forward until the
piston rod is out of the T-slot on the slider assembly.
5. Slide the piston rod (7) out through the bottom of the pump
block (4).
6. Loosen and remove the retainer nut (1) and piston guide (2)
from the pump block (4).
7. Remove the upper (3) and lower (6) packings from the pump
block.
8. Clean the pump block (4).
9. Locate the new upper and lower packings and pack the areas
between the packing lips with grease. Lubricate the o-rings
on the exterior of the packings with grease.
10. Inspect the piston rod (7) for wear and replace if necessary.
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LineCoat 800