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Plunger Pumps
Operating Instructions and Parts Manual RK Series Pumps
Figure 5
Figure 6
Figure 4
Special Features (continued)
Crankcase: Precision die-cast,
large cooling fins and anodized (for
maximum heat dissipation).
Rear Cover: Precision die-cast, O-ring
sealed and bayonet style sight glass for
positive sealing and locking (no threads
to loosen).
Plunger Rods: Stainless steel
construction for strength (no plating to
scrape off), back-up and O-ring plunger
sealing system.
Rod Pins: Precision ground and
hardened steel, oversized for load
disbursement.
Connecting Rods: One-piece special
allow aluminum (3XU51, 3XU60 and
3XU68) or bronze (3XU52, 3XU54,
3XU61and 3XU62) for higher pressure,
oversized for maximum strength, load
disbursement, and life. Heavy pin area
construction, for added load strength.
Crankshaft: Forged, precision ground
and hardened for extremely long life
and durability.
Oil Seals and O-rings: Triple lip oil
seals, long life and much less leak
prone. All are constructed of Buna-
N rubber. The O-rings have stainless
steel garder springs to assure constant
tension on the sealing surface.
Oil Drains: Quantity of two (2). One in
the rear cover and one in the bottom of
the crankcase.
Oil Capacity: 15.5 oz.
Extra Features
Dyno Proven: All pumps are dyno
tested to assure the theoretical design
meets the actual design.
Valve Design: Each pump series has a
valve design that optimizes its highest
efficiency.
Installation
Direct Drive Electric and Gasoline
Pumps
1. Install the shaft key into the
keyway and apply a light coating
of anti-seize on the
engine shaft.
2. Align the two key
ways and push the
pump completely
onto the engine. (See
Figure 4 & 5)
3. Install all four (4)
bolts and tighten
evenly.
4. Remove the red
shipping oil cap
and install the black
crankcase vent cap.
(See Figure 6)
5. Install the
appropriate
unloader valve and
other accessories.
6. Install the appropriate water inlet
and discharge fittings.
7. Connect the water supply hose and
high-pressure discharge hose/spray
gun.
8. Turn on the water supply.