859.0089
11
Check Valve Repair
NOTE:
Kits are available for new check valve balls and
seats in a range of materials. See page 24 to order kits in
the material(s) desired. An o-ring kit and fastener kits
also are available.
NOTE:
To ensure proper seating of the check balls,
always replace the seats when replacing the balls. Also,
on models with manifold o-rings, replace the o-rings.
Disassembly
1. Follow the
on page 8.
Disconnect all hoses.
2. Remove the pump from its mounting.
3. Use a 10 mm socket wrench to remove the outlet
manifold fasteners (6). See F
NOTE: For plastic pumps (
VA25C, VA25P,
and
VA25F
), use hand tools only until thread-locking
adhesive patch releases.
4. Remove the o-rings (12,
not used on some models),
seats (10), and balls (11).
5. Turn the pump over and remove the inlet manifold.
Remove the o-rings (12,
not used on some models),
seats (10), and balls (11).
Reassembly
1. Clean all parts and inspect for wear or damage.
Replace parts as needed.
2. Reassemble in the reverse order, following all notes
. 6. Be sure the ball checks (10-12) and mani-
folds (4, 5) are assembled
exactly
as shown. The
arrows (A) on the fluid covers
must
point toward the
outlet manifold (4).
F
IG
. 6. Ball check valve assembly
Torque to 100 in-lb (11.3 N•m). See
page 15.
1
Not used on some models.
3
ti14098a
6
4
11
12
10
12
3
6
5
Arrow (A) must point toward outlet manifold.
2
1
1
2
A
10
12
12
3
3
3
3
11
Aluminum pump
shown
7
