Servicing The Fluid Section - Titan PowrLiner 850 Mode D'emploi

Maintenance
6.6

Servicing the Fluid Section

Use the following procedures to replace the seals and repack
the fluid section.
i
Repacking kit P/N 759-365 is available. For
best results use all parts supplied in this kit.
Disassembling the Fluid Section (fig. 25)
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.
1. Remove the suction set.
2. Remove the front cover and the three screws that
secure it using a T20 Torx head driver.
3. Remove the yoke screw (1) and washer (2) that secures
the dowel pin (3). The dowel pin connects the yoke (4)
to the piston (5).
4. Using a pliers, pull the dowel pin (3) out.
5. Rotate the pump shaft so the piston (5) is in the top
dead center position. This can be done by pushing
on the yoke (4). This is required to disassemble all the
parts.
6. Unscrew and remove the Sureflo Valve (6) assembly
(refer to the Cleaning the Sureflo Valve procedure in the
Cleanup section of this manual).
7. Remove the piston assembly by pushing down on the
piston near the yoke.
DO NOT attempt to remove the seals (5a) from
the piston
Attention
8. Unscrew and remove the top nut (7) using an adjustable
wrench.
9. Remove the worn seal (8) using a flat head screwdriver
or punch. Remove the top seal from the top by pressing
against the side of the seal and popping it out. Be sure
not to scratch the housing where the seals are located.
10. Clean the area where the new seals are to be installed.
Assembling the Fluid Section
1. Lubricate the new top seal (8) with Piston Lube (P/N
314-480) or light household oil and place the seal by
hand with the cup side of seal down into the top port of
the housing.
2. Place a small amount of anti-seize on the threads of the
top nut. Place the top nut into the top of the housing
and tighten with an adjustable wrench. This will drive
the top seal into the correct position.
3. Lubricate the seal on the
piston/seal assembly similar
to the top seal. Place the
piston/seal assembly into the
bottom of the housing. Insert
the insertion tool (fig. 24, item
1) and push into position to
properly seat the piston/seal.
Remove the insertion tool.
4. Install the new O-ring (9) on
the Sureflo Valve assembly,
GB
lubricate with Piston Lube (P/N 314-480), thread into
the bottom (inlet) of the housing, and tighten with an
adjustable wrench. This will drive the bottom seal into
the correct position.
5. Align the piston with the yoke. Be careful not to
damage the piston.
6. Apply any type of non-silicone household grease to the
piston and yoke area to prolong life. Apply to the holes
in the yoke where the dowel is inserted.
7. Install the dowel pin to connect the yoke to the piston.
The piston may have to be moved up or down to align
with the yoke.
8. Install the yoke screw and washer to secure the dowel
pin.
9. Turn pump right side up and apply a few drops of
Piston Lube or light household oil between the top nut
and piston. This will prolong the seal life.
10. Install front cover and three (3) screws.
11. Replace Sureflo Valve and install the suction set.
12. Turn on the sprayer by following the procedure in the
"Operation" section of this manual and check for leaks.
1
20
5
5a
10
9
6
11
7
8
4
2
1
3
Ball guide
Outlet ball
Outlet valve
Inlet ball
Inlet O-ring
PowrLiner 850