WAGNER HEAVYCOAT HC730 Owner's Manual page 29

heavycoat
HeavyCoat 770 only), lower packing set (4b), lower packing
spring (9) and spring retainer (8).
12. Using a 1/2" extension bar attached to a 1/2" drive ratchet,
insert the end of the extension bar into the square opening
of the foot valve cage (17) inside the foot valve housing
(23). Unscrew and remove the foot valve cage from the
foot valve housing.
13. Remove the PTFE o-ring (22), foot valve ball (18), foot valve
seat (19), and seat o-ring (20) from the foot valve housing
(23).
14. Remove the o-ring (21) from the pump cylinder (16)
reassemBlINg THe fluID seCTIoN
Use PTFE tape on all threaded pipe connections.
i
1. Place a new seat o-ring (20) into the groove in the bottom
of the foot valve housing (23).
2. Inspect the foot valve seat (19) for wear. If one side is worn,
flip the seat to the unused side. If both sides are worn,
install a new seat. Place the new or flipped seat (worn
side down) into the bore at the bottom of the foot valve
housing (23).
3. Place a new foot valve ball (18) onto the foot valve seat
(19). Using a 1/2" extension bar attached to a 1/2" drive
ratchet, insert the end of the extension bar into the square
opening of the foot valve cage (17) and screw the foot
valve cage into the foot valve housing (23). Torque the
cage to 240 in./lbs. (20 ft./lbs.).
4. Insert a new PTFE o-ring (22) into the groove of the foot
valve housing (23). Lubricate the o-ring using oil or grease.
5. After soaking the leather packings in oil (preferably linseed
oil), reassemble the lower packing set (4b). Place the set
onto the outlet valve housing (13) with the peak of the
"V" packings pointing down toward the hex on the outlet
valve housing.
All leather packings must be soaked in hydraulic
i
oil for 15–20 minutes before installation. Soaking
the packings too long will cause the packings to
swell and create difficulty during reassembly.
6. Inspect the outlet valve seat (11) for wear. If one side is
worn, flip the seat to the unused side. If both sides are
worn, use a new seat. Insert the outlet valve cage (28,
HeavyCoat 750 / 770 only) outlet valve ball (10), new or
flipped seat (worn side away from ball), and a new seal
washer (12) into the displacement rod (6).
7. Clean the threads on the outlet valve housing (13) and
coat the threads with blue Loctite #242. Make sure the
Loctite is only on the threads.
8. Place the lower packing spring (9) onto the outlet valve
housing (13) followed by the spring retainer (8).
9. Screw the displacement rod (6) and the outlet valve
housing (13) together. Tighten in a vise to 50 ft./lbs. (68
Nm).
10. Insert the PTFE o-ring (3) into the upper grove of the
motor/pump block.
11. Insert the upper packing set (4a) into the motor/pump
block with the peak of the "V" packings pointing up toward
the motor.
The packings must be soaked in hydraulic oil
i
before installation.
12. Place the upper packing spring (5) into the motor/pump
block with the small tapered end facing up toward the
motor/pump block.
13. Insert the displacement rod (6) up through the upper
packings in the motor/pump block.
14. Align the holes in the displacement rod (6) and the
hydraulic piston rod and insert the connecting pin (2).
Replace the retaining ring (1) over the connecting pin.
15. HeavyCoat 730 - Thread the long threads of the pump
cylinder (16) into the motor/pump block and tighten with
a strap wrench.
16. Thread the male threads of the cylinder spacer (14) into
the motor/pump block and tighten with a strap wrench.
Thread the long threads of the pump cylinder (16) into the
cylinder spacer (14) and tighten with a strap wrench.
17. Place the o-ring (21) onto the top grove of the pump
cylinder (16).
18. Thread the foot valve housing (23) onto the pump cylinder
(16), tighten with a strap wrench.
19. HeavyCoat 730 - Install the siphon tube (26).
It is not necessary to over-tighten the foot valve
i
housing. O-ring seals perform sealing function
without excessive tightening. Full thread
engagement is sufficient.
HeavyCoat 730 - For siphon tube attachment,
it is critically important that the threads of the
siphon tube fit snugly into the foot valve housing
with the tube PTFE taped and sealed to prevent
air leakage.
maintenance
29