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Cleaning and Maintenance
Seat and Valve Stem Replacement
(See the Parts Drawing on page 7)
NOTE: Order Kit No. 223016 to repair the back pres-
sure valve.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 5.
1. Relieve the pressure. Then remove the back
pressure valve from the fluid line.
2. Unscrew the seat housing (11) from the valve
housing (1).
3. Remove the valve seat (10), spring (8), and o-rings
(7, 9) from the seat housing (11).
4. Remove the retaining ring (6) and valve stop (5)
from the valve housing (1).
5. Remove the locking nut (3) from the valve
stem (2).
6. Remove the valve stem (2).
7. Clean and inspect all parts. Replace all o-rings
with those provided in Kit No. 223016. Be sure to
lubricate all the o-rings and the spring.
8. Install o-rings (4 and 13) on the valve stem (2).
Install the stem into the valve housing (1).
9. Install the valve stop (5) over the tip of the valve
stem (2).
10. Install retaining ring (6) into the valve housing (1).
11. Slide the o-ring (9) onto the valve seat (10). Install
the valve seat into the valve housing (1), with its
inside chamfer facing towards the valve stem (2).
12. Grease the spring (8) and install it into the seat
housing (11). Install the o-ring (7) on the seat
housing. Apply sealant to the seat housing threads
and screw it into the valve housing (1). Torque to
30–35 ft-lbs (41–47 NSm).