Models 1851 and 1851K
1. Examine Lo-Pressure Seals for wear to the internal ridges,
outer surfaces, or for broken springs and replace as needed.
2. Examine LPS Adapters for scale build up or wear, and O-Rings
for cuts or deterioration and replace as needed.
3. Press new Lo-Pressure Seals into the LPS Adapters with the
garter spring up.
NOTE: When using alternate materials, the fit of the spe-
cial materials may be snug and require gently driving the
LPS into position with a cylinder of the same diameter to
assure a square seating and no damage to the LPS.
4. Place Inlet Manifold on work surface with crankcase side up.
5. Press LPS Adapter Assemblies into each chamber of the
Inlet Manifold with the garter spring down.
6. Examine the Female Adapters for scale build-up, wear and
O-Rings for cuts or deterioration and replace as needed.
7. Examine Male Adapters for wear and replace as needed.
8. Examine V-Packings for frayed edges or uneven wear and
replace as needed.
9. Place VBM on work surface with crankcase side up.
10. Place the Male Adapter with flat side down inside VBM
chamber.
11. Insert two V-Packings with “V” side up into each VBM
chamber. The “V” will mate with “V” side of the Female
Adapter.
12. Press Female Adapter with “V” facing into VBM chamber.
13. Support the Inlet Manifold from the under side and slide
manifold over Manifold Studs.
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
over Manifold Studs. Install Flat Washers and LockWashers.
Apply anti-seize to manifold studs and nuts, and thread nut in
hand tight. Torque in sequence to specifications in torque
chart.
TORQUE SEQUENCE
SERVICING THE SEALS CONTINUED
Reassembly
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.
NOTE: For standard installation, apply a small amount of
oil to the outside edge of the LPS, HPS, VP, MA, FA and
O-Rings for ease of installation and to avoid damage.
Models 1861/1861K
1. Examine Lo-Pressure Seals for wear to the internal ridges,
outer surfaces, or for broken springs and replace as needed.
2. Examine LPS Adapters for scale build up or wear, and O-Rings
for cuts or deterioration and replace as needed.
3. Press new Lo-Pressure Seals into the LPS Adapters with the
garter spring up.
NOTE: When using alternate materials, the fit of the spe-
cial materials may be snug and require gently driving the
LPS into position with a cylinder of the same diameter to
assure a square seating and no damage to the LPS.
4. Place Inlet Manifold on work surface with crankcase side up.
5. Press LPS Adapter Assemblies into each chamber of the
Inlet Manifold with the garter spring down.
6. Examine the V-Packing Cylinders for scale build-up, wear
and O-Rings for cuts or deterioration and replace as needed.
7. Examine Male and Female Adapters for wear and replace as
needed.
8. Examine V-Packings for frayed edges or uneven wear and
replace as needed.
9. Place the V-Packing Cylinder on work surface with the small
diameter down.
10. Place a Female Adapter with flat side down inside each
V-Packing Cylinder.
11. Insert two V-Packings with “V” side down into each V-Packing
Cylinder. The “V” will mate with “V” side of the Female Adapter.
12. Place Male Adapter with “V” side down inside each
V-Packing Cylinder.
13. Place VBM on flat work surface with crankcase side up.
14. Press V-Packing Cylinder Assembly into VBM chambers with
V-Packings facing into the manifold chamber.
15. Support the Inlet Manifold from the under side and slide man-
ifold over Manifold Studs.
16. 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.
17. Support the Discharge Manifold from the under side and slide
over Manifold Studs. Install Flat Washers and LockWashers.
Apply anti-seize to manifold studs and nuts, and thread nut in
hand tight. Torque in sequence to specifications in torque
chart.
5
1
3
7
8
4
2
6
