Use and Care Manual
First Choice When Quality Matters
NORTH
AMERICA
Plunger Pumps
Operating Instructions and Parts Manual RK Series Pumps
Figure 15
Figure 16
Figure 19
Figure 18
Figure 13
Figure 14
Figure 12
Figure 17
Figure 20
Service Pumps (continued)
4. Use a small probe to
move the poppet up
and down to assure
that the valve is
functioning properly
and that no debris is
stuck in the valve. (See
Figure 12)
5. Using the
mechanics pick
remove the
valve seat O-ring
and inspect for
any damage, replace if
necessary. (See Figure 13)
Valve Assembly:
1. Install the valve
seat O-ring
squarely into the
bottom of the
manifold. (See
Figure 14)
2. Insert the valve assembly
squarely into the
port pushing it into
the O-ring. (See
Figure 15)
3. Install the valve cap
and torque to the
proper specifi cation.
(See Figure 16) (See
parts breakdown)
Servicing the
Packings/Seals
To access the water
seals for inspection or
replacement, you will fi rst
need to remove the head of
the pump.
Tools required: 6mm hex socket, ratchet,
(2) long screwdrivers, reversible pliers,
mechanics pick and torque wrench.
Disassembly:
1. First remove the eight 6mm head
bolts. (See Figure 17)
2. Place the screwdrivers
as shown between the
head and crankcase of the
pump, lifting one up and
the other down. The head
should start to lift off of
the plungers. (See
Figure 18)
3. When you remove
the head you may
notice that some of
the water seals have
stayed on the plungers
and some in
the head. (See
Figure 19) To
remove the
seals from the
plungers simple
turn the assemblies and
pull off.
4. If the seal assemblies are in the
head use the reversible pliers to
grab the seal retainer
on the inside bore
(NOTE: Use a rag so
you do not mar the
piston guide area),
twist the retainer in
either direction
Plunger Pumps
Operating Instructions and Parts Manual RK Series Pumps
First Choice When Quality Matters
NORTH
AMERICA
Pos. Code Description Qty. Pos. Code Description Qty.
41 1380040 Open bearing support (217 in/lbs) 1
42 740290 O-Ring
Ø14x1.78 3
43 1980740 Plug 3/8” G 2
44 1260470 Bolt
M8x10 4
1380141 Rail 5/8” (N Version only) 2
Z-Bracket 1-3/4 Rail 1-3/4” (N Version only) 2
45
Z-Bracket Rail 2-5/8” (N Version only) 2
1980740 Plug 3/8” G 1
46
1981180 Plug 3/8” G NP 1
47 180101 O-Ring Ø17.5x2 1
820361 Plug 1/2” G 1
48
960870 Plug 1/2” G NP 1
1381071 Pump head - Brass Ø18 1
1381070 Pump head - NP Ø18 1
1380020 Pump head - Brass Ø20 1
1380680 Pump head - NP Ø20 1
1383010 Pump head - Brass Ø22 1
49
1383310 Pump head -NP Ø22 1
50 820150 Head bolt M8x70 (217 in/lbs) 8
2280260 Hollow shaft Ø1-1/8” 1
2280200 Hollow shaft Ø1-1/8” 1
2280270 Hollow shaft Ø1-1/8” 1
59
2280280 Hollow shaft Ø1-1/8” 1
60 1380320 Bearing 1
61 621170 Oil seal 1
62 1380220 O-Ring Ø72.75x1.78 1
63 1380210 Compete cover 1
64 1591 Electric Flange F17 1
65 620610 Bolt 4
69 1381850 Washer 8
1389270 Complete pump head - Brass Ø18 1
1389272 Complete pump head - NP Ø18 1
1389271 Complete pump head - NP Ø18 1
1389208 Complete pump head - Brass Ø20 1
1389212 Complete pump head - NP Ø20 1
1389268 Complete pump head - Brass Ø22 1
71
1389269 Complete pump head - NP Ø22 1
75 1080401 Back-up ring 3
77 840370 Bearing 1
86 1260250 Oil sight glass 1
87 1260430 Snap ring 1
88 1780690 Contrast disc 1
89 1140450 O-Ring Ø20.24x2.62 1
AR64516 Oil 1
OIL CAPACITY - 15 OZ
1 960160 O-Ring Ø17.86x2.62 6
960090 Valve cap - Brass (478 in/lbs) 6
960850 Valve cap - SS (478 in/lbs) 6
1380740 Valve cap - NP (478 in/lbs) 6
960090T Valve cap - 1/4” threaded - Brass (478 in/lbs) 1
2
960850T Valve cap - 1/4” threaded - SS (478 in/lbs) 1
3 1389051 Complete valve 6
4 880830 O-Ring Ø15.54x2.62 6
880581 Plug 1/4” G - Brass 2
5
1380690 Plug 1/4” G NP 2
6 820510 O-Ring Ø10.82x1.78 2
960110 Support ring Ø18 3
840300 Support ring Ø20 3
11
840320 Support ring Ø22 3
880320 High pressure packing Ø18 3
840290 High pressure packing Ø20 3
12
840330 High pressure packing Ø22 3
1380090 Piston guide Ø18 3
1380150 Piston guide Ø20 3
13
1380160 Piston guide Ø22 3
14 961240 O-Ring Ø31.47x1.78 3
880330 Low pressure seal Ø18 3
840280 Low pressure seal Ø20 3
15
840340 Low pressure seal Ø22 3
16 1383130 Oil seal 3
17 850370 Bolt M8x16 (217 in/lbs) 8
18 1380050 Closed bearing support 1
19 640030 O-Ring Ø59.99x2.62 2
20 2280240 Bearing 1
21 1382770 Pump housing 1
22 880130 Vented oil cap 1
23 962010 Nut M8 (106in/lbs) 3
24 962000 Washer Ø8.1 3
1380940 Ceramic piston Ø18 3
1380930 Ceramic piston Ø20 3
25
1382360 Ceramic piston Ø22 3
26 1380950 Slinger 3
27 600180 O-Ring Ø7.66x1.78 3
28 1380920 Guiding piston 3
29 1380060 Piston pin 3
1383020 Con rod - Bronze > 3000 PSI 3
30
1383050 Con rod - Aluminum < 3000 PSI 3
34 1780510 O-Ring 1
35 1789010 Complete cover 1
36 1343510 Bolt M6x14 (89 in/lbs) 6
2280100 Crankshaft 24mm 1
2280090 Crankshaft 24mm 1
2280070 Crankshaft 24mm 1
2280060 Crankshaft 24mm 1
37
2280110 Crankshaft 24mm - NL 1
38 1380520 Key 1
39 180340 Oil seal 1
1380120 Shim 0.10 mm 1-3
1380130 Shim 0.20 mm 1-3
1380530 Shim 0.25 mm 1-3
40
1382810 Shim 0.05 mm 1-3