Reassembly of Discharge Valves and Inlet Valves
NOTE: For standard applications, apply a small amount
of oil to the O-Rings for ease of installation and to avoid
damage.
NOTE: For certain applications apply liquid gasket to the
O-Ring crevices and seal surfaces. Refer to Tech Bulletin
053 for model identification.
NOTE: EPDM elastomers require silicone-base lubricant.
1. Examine Spring Retainers for internal wear or breaks in the
structure and replace as needed.
2. Examine Springs for fatigue or breaks and replace as needed.
3. Examine Valves and Seats for grooves, pitting or wear and
replace as needed.
4. Examine Seat O-Rings and Back-up-Rings for cuts or wear
and replace as needed.
5. Examine Valve Adapter for external surface scoring
or wear and replace as needed. Examine Valve Adapter
O-Rings and Back-up-Rings for cuts or wear and replace as
needed.
NOTE: A new Valve Assembly will come pre-assembled
in the kit. Kit does not include Adapter. Continue with
steps 11 through 15. If servicing from individual parts,
follow steps 6 through 15.
6. Install two Back-up-Rings and two O-Rings onto both the
front and rear of the Valve Adapter with the O-Rings to the
outside.
7. Place Valve Adapter on work surface with small I.D. end
facing up.
8. Install O-Ring, then Back-up-Ring onto Seat. Press O-Ring
end of the Seat into Valve Adapter.
9. Place the Valve onto the Seat with dish side down/spring
tab up.
10. Place Spring on Valve and snap the Spring Retainer onto
Seat.
11. Place VBM and Discharge Manifold on work surface with
crankcase side up.
12. Press Inlet Valve Assembly with Adapter into valve chamber
of VBM with Spring Retainer facing down until completely
seated.
13. Press Discharge Valve Assembly with Adapter into valve
chamber of Discharge Manifold with Spring Retainer facing
down until completely seated.
14. Support the VBM from the under side and slide manifold over
Manifold Studs. Apply anti-seize to HSH screw threads and
thread in hand tight. Torque in sequence to specifications in
torque chart.
15. Support the Discharge Manifold from the under side and slide
manifold over the Manifold Studs. Install Flat Washers and
LockWashers. Apply anti-seize to manifold studs and nuts,
and thread nut on hand tight. Torque in sequence to specifi-
cations in torque chart.
SERVICING THE SEALS
1851/1851K AND 1861/1861K
Disassembly
NOTE: Both the standard and the “K” versions are serviced
in the same manner.
1. To service the seals, it is necessary to remove both the
Discharge Manifold and the VBM. Follow the disassembly
procedure for Discharge and Inlet Valves, both steps 2 and 3.
NOTE: The V-Packing Cylinder (1861) or Female Adapter
(1851) Assemblies may stay in the VBM or Inlet Manifold.
2. To remove the V-Packing Cylinders (1861) or Female
Adapters (1851) from either manifold, remove the exposed
O-Rings. Insert two screwdrivers into the groove on opposite
sides of the V-Packing Cylinder (1861) or Female Adapter
(1851) and pry from the chamber.
CAUTION: Exercise caution as the screwdrivers may
score o-ring sealing area.
3.
On the model 1861, remove one Male Adapter, two V-Packings
and one Female Adapter from each V-Packing Cylinder.
4. On the model 1851, remove two V-Packings and one Male
Adapter from each VBM chamber.
5. Carefully slide the Inlet Manifold over the plunger ends and
place on side or top surface.
NOTE: There is no need to remove Manifold Studs.
6. Using reverse pliers, remove three LPS Adapter Assemblies
from the manifold chamber.
7. Remove Lo-Pressure Seals from backside of LPS Adapters.
Removal of V-Packing Cylinder or Female Adapter
from Valve Block Manifold
V-Packing arrangement
Lo-Pressure Seal and Adapter
1861
1851
