Plunger pumps, Rk series pumps, North america – Vortexx RK Series User Manual
Page 7

Plunger Pumps
Operating Instructions and Parts Manual
RK Series Pumps
First Choice When Quality Matters
NORTH
AMERICA
Figure 7
Figure 11
Figure 10
Installation (continued)
9. Open the spray gun to purge the
system of any air.
 10. Start the engine.
 11. Adjust the engine speed and 
unloader valve.
Belt Drive Systems
1. Mount the pump
securely to the base 
plate. (See Figure 7) 
For new installation 
a mounting rail kit 
is required, refer to parts 
breakdown.
2. Install the pump pulley on the
crankshaft. It should be 
as far onto the shaft as 
possible.
3. Align the pulleys so they
are in line. (See Figure 
8)
4. Use a belt tension
gauge to assure 
proper tension 
(too much tension 
can cause bearing 
failure or damage 
the belts as well as 
cause other problems). 
(See Figure 9)
5. Installation complete.
Winter or Long Time Storage
1. Drain all of the water out of the
pump.
2. Run a 50% solution of a RV or
non-toxic/biodegradable antifreeze 
through the pump.
3. Flush the pump with fresh water
before the next use.
4. In freezing conditions failure to
do this may cause internal pump 
damage.
5. For long periods of storage in
non-freezing areas the solution 
will keep the seals and O-rings 
lubricated.
Service Pumps
Servicing the Valves
The inlet and discharge valves in this 
series pumps are all the same. The 
valves are located under the six 24mm 
hex plugs. The inlet valves are located 
on the lower row and the discharge 
valves are located on the top row of the 
pump head.
Tools required: 24mm socket, ratchet, 
needle nose pliers, mechanics pick and 
torque wrench.
Valve Removal:
1. Remove the valve cap.
2. Inspect the 
valve cap O-
ring for any 
damage, replace 
if necessary. (See 
Figure 10)
3. Use the needle nose
pliers to remove the 
valve. (See Figure 
11)
Figure 8
Figure 9
