21309286
Pump Service: 2730 Pressure Washers
Repair kits are available. See the Parts Lists (page 27). For the best results, use all parts in the kits.
Perform Pressure Relief Procedure (page 7).
NOTES:
D The following metric wrenches are needed: 5 mm,
13 mm, and 22 mm.
D There is a tool kit to aid in servicing the pump.
Tool Kit 800271 includes tools to aid in removing
packing retainers.
D It is important to drain and refill the pump after the
50 hours of operation.
Valves
NOTE: For a set of six valves, order Valve Assembly
Kit 804402.
1. Remove the hex plug from the manifold using a
22 mm socket.
2. Examine the O-ring under the hex plug, and replace
if cut or distorted.
3. Remove the valve assembly from the cavity; the
assembly might come apart.
4. Install the new valve. Install the O-ring and hex plug.
Torque to 33 ft-lb (45 NSm).
NOTE: Retorque the plug after 5 hours of operation.
Pumping Section
1. Remove the eight capscrews and lockwashers from
the manifold using a 5 mm wrench.
2. Carefully separate the manifold from the crankcase.
NOTE: You might have to tap the manifold lightly
with a soft mallet to loosen it.
CAUTION
To avoid damage to the plunger or seals, keep the
manifold properly aligned with the ceramic plungers
when you remove it.
3. Carefully examine each plunger for any scoring or
cracking, and replace as necessary.
Servicing the Plungers
1. Loosen the plunger retaining nut five or six turns
using a 13 mm wrench. Push the plunger towards
the crankcase to separate the plunger and retain-
ing screw.
2. Remove the nut from the plunger 804011, and
examine and clean the O-ring, backup ring, and
copper bearing/gasket washer.
3. Remove the plunger and flinger from the plunger
shaft. Clean parts as necessary.
4. Inspect the plunger shaft for oil leakage from the
crankcase. If leaking is obvious, replace the oil
seals. Otherwise, DO NOT remove these seals,
because they cannot be reused. Oil Seal Kit
804033 us available for replacing the seals.
5. Lightly grease the flinger (and oil seal if it is being
replaced), and replace on the plunger shaft. Then
install the plunger.
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