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Apply a thin film of oil to the new O-rings and
Plungers before installing them.
7. Inspect the Plungers for cracking and replace them if
damaged installing new O-rings and Slinger Rings at
the same time.
8. Install the Plunger Retaining Nut Washers: then,
apply a drop of blue thread locking compound to the
threads of the Plunger Retaining Nuts and install
them.
9. Tighten the Plunger Retaining Nuts to 88 in. lbs.
[9.8 Nm] torque (See Figure 5).
If you are replacing the Packings, proceed with
Packing Replacement.
10. Lubricate the Plungers and install the Pump Head
onto the Plungers: then, push the Pump Head
against the Pump Body.
11. Install the Socket Head Cap Screws removed in
Step 1; then tighten them as shown in Figure 6 to 88
in. lbs. [9.8 Nm] torque.
Packing Replacement
Water leakage between the pump head and pump body
indicates the plunger packings require replacement.
1. Using a metric allen wrench, remove the socket
head Cap Screws securing the pump head to the
pump body (See Figure 3).
2. While turning the crankshaft, use two screwdrivers
to carefully pry between the pump head and pump
body to remove the pump head (See Figure 4).
3. Using Extractor Pliers, remove the Seal Retainers
and Seals (See Figure 7).
4. Using a small blade knife, remove the Seals from
the Seal Retainers.
5. Lightly lubricate and install new seal kit items in the
order shown in Figures 8 and 9.
6. Lightly lubricate the plungers and install the pump
head onto the plungers: then push the pump head
against the pump body.
7. Install the socket head Cap Screws removed in
Step 1; then tighten them as shown in Figure 6 to
88 in. lbs. [9.8 Nm] torque.
Plunger
Plunger Retaining
Nut
Figure 5
Alternately and evenly tighten the
Socket Head Cap Screws to
88 in. lbs. [9.8 Nm] torque.
Figure 6
Using Extractor
Pliers to remove
Seal Retainers
and Seals
Figure 7
Support Ring
Models
1806C & 1807C
Packing
Replacement
Figure 8
Models
1826C & 1827C
Packing
Replacement
Figure 9
5
Slinger Ring
Plunger Retaining
Nut Washer
Seal
Piston Guide
O-ring
Seal
Seal Retainer
Seal
Gasket
O-ring
Seal Retainer
O-ring
Seal
Seal
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