Datasheet Content
W958
TECHNICAL INFORMATION
Flow (L/min) 15,9
Flow (US Gpm) 4,2
Rotation regime (rpm) 1750
Pressure (MPa) 9,6
Pressure (bar) 96
Pressure (psi) 1400
Power (hp) 4
Power (kW) 2,94
Overall dimensions L x l x h (mm) 225x223x142,5
Weight (kg) 7,7
W958 3/21/2026 Page 1 - 14
Copyright INTERPUMP GROUP S.P.A
W958
Documents
Male shaft (key)
Hollow shaft (key) Ø28,6 - vers. A
Pump head with VH integrated valve
Pump head with VK integrated valve
W958 3/21/2026 Page 2 - 14
Copyright INTERPUMP GROUP S.P.A
Illustration Male shaft (key)
W958 3/21/2026 Page 3 - 14
Copyright INTERPUMP GROUP S.P.A
Illustration Male shaft (key)
Pos. Code Description Qty Notes
KIT131 34013101 KIT 131 CPL.SEAL PIST. D. 18 1
KIT129 34012901 KIT 129 HEAD RING D.18 1
KIT128 34012801 KIT 128 INTERMEDIATE RING 1
D.18
KIT127 34012701 KIT 127 PACKING D. 18 1
KIT126 34012601 KIT 126 PACKING RETAINER 1
D.18
KIT124 34012401 KIT 124 VALVE CAPS 1
KIT123 34012301 KIT 123 INTAKE/DELIVERY 1
VALVE
KIT23 34002301 KIT 23 OIL SEAL D.20X30X5 1
54 53150022 SIDE CRANKCASE COVER 1
53 90067100 CIRCLIP ZJ30 1
52 90385900 O-RING 25,07X2,62 (3100) 1
51 90268400 PACKING 18X30X7 (L.P.) 3
50 98196600 PLUG G1/8X8 1
49 96751400 WASHER 21,5X27X1,5 1
48 96738000 WASHER 17,5X23X1,5 1
47 98217600 PLUG G1/2X10 1
46 98210000 PLUG G3/8X13 1
45 44100151 HEAD RING D. 18 3
44 90268200 PACKING D. 18 3
43 90268300 RESTOP RING D. 18 3
42 44216170 INTERMEDIATE RING D. 18 3
41 44080170 PACKING RETAINER D. 18 3
40 90361200 O-RING 31,47X1,78 (2125) 3
39 99303700 SCREW M 8x16-5739 4
38 96701600 WASHER 8,4 4
37 50200074 PUMP FOOT 2
36 90164100 OIL SEAL D.25X62X10 1
35 92221600 NUT M8X13X5 3
34 44211570 WASHER D. 8 3
33 44040109 PISTON D.18X37.5 3
32 90357200 O-RING 5,28X1,78 SPEC. (2021) 3
31 90502200 ANTI-EXTRUSION RING 3
30 96735000 WASHER D.16X28X1 3
29 97734000 CONNECTING-ROD PIN 3
D.10X29,5
28 98204250 PLUG G1/4"x12 1
27 90358500 O-RING 10,82X1,78 (2043) 1
26 99183700 SCREW M 6x14 UNI 5931 5
W958 3/21/2026 Page 4 - 14
Copyright INTERPUMP GROUP S.P.A
Illustration Male shaft (key)
Pos. Code Description Qty Notes
25 44160022 REAR CRANKCASE COVER 1
24 90392000 O-RING 101,27X2,62 (3400) 1
23 44030022 CONNECTING ROD 3
22 44050066 PISTON GUIDE 3
21 91489200 KEY 8(h9)X7X35 UNI 6604/A 1
20 44020635 CRANKSHAFT C.13 (D.24) 1
19 98210300 OIL DIP-STICK G3/8X51 1
18 44010022 CRANKCASE 1
17 90161400 OIL SEAL 20x30x5 3
16 91833100 BALL BEARING 6305 SKF 2
15 90389800 O-RING 56,82X2,62 (3225) 1
14 53210851 OIL LEVEL GAUGE 1
13 50150074 CRANKCASE COVER 1
12 99180700 SCREW M 6x12 UNI 5739 8
11 36711501 INTAKE/DELIVERY VALVE 6
10 98222600 VALVE CAP M24X1,5X17 6
9 90384700 O-RING 20,29X2,62(3081) 6
8 36202551 VALVE CAGE 6
7 94737600 SPRING D. 9,4X14,8 6
6 36200176 VALVE PLATE 6
5 36200366 VALVE SEAT 6
4 90384100 O-RING 17,12X2,62 (3068) 6
2 99317500 SCREW M 8x60 UNI 5931 8
1 44120441 MANIFOLD 1
W958 3/21/2026 Page 5 - 14
Copyright INTERPUMP GROUP S.P.A
Illustration Hollow shaft (key) Ø28,6 - vers. A
W958 3/21/2026 Page 6 - 14
Copyright INTERPUMP GROUP S.P.A
Illustration Hollow shaft (key) Ø28,6 - vers. A
Pos. Code Description Qty Notes
KIT23 34002301 KIT 23 OIL SEAL D.20X30X5 1
KIT131 34013101 KIT 131 CPL.SEAL PIST. D. 18 1
KIT129 34012901 KIT 129 HEAD RING D.18 1
KIT128 34012801 KIT 128 INTERMEDIATE RING 1
D.18
KIT127 34012701 KIT 127 PACKING D. 18 1
KIT126 34012601 KIT 126 PACKING RETAINER 1
D.18
KIT124 34012401 KIT 124 VALVE CAPS 1
KIT123 34012301 KIT 123 INTAKE/DELIVERY 1
VALVE
64 99191200 SCREW M 6x30 UNI 5931 4
63 96693800 WASHER 6,4X10X0,7 4
62 90169000 OIL SEAL D. 45X62X8 1
61 10050422 FLANGE FOR 1
EL.MOT.145-184TC(US
60 96719500 WASHER 13X18X1,1 4
59 99460000 SCREW 1/2-13X1-1/4"ANSI 4
B18.2.
58 90409700 O-RING 55,56X3,53 (159) 1
57 91856800 NEEDLE BEARING DHK 4520 1
56 44021665 CRANKSHAFT C.13(1-1/8" 1
HOLLOW)
55 90063500 CIRCLIP D. 25 UNI 7435 1
54 53150022 SIDE CRANKCASE COVER 1
53 90067100 CIRCLIP ZJ30 1
52 90385900 O-RING 25,07X2,62 (3100) 1
51 90268400 PACKING 18X30X7 (L.P.) 3
50 98196600 PLUG G1/8X8 1
49 96751400 WASHER 21,5X27X1,5 1
48 96738000 WASHER 17,5X23X1,5 1
47 98217600 PLUG G1/2X10 1
46 98210000 PLUG G3/8X13 1
45 44100151 HEAD RING D. 18 3
44 90268200 PACKING D. 18 3
43 90268300 RESTOP RING D. 18 3
42 44216170 INTERMEDIATE RING D. 18 3
41 44080170 PACKING RETAINER D. 18 3
40 90361200 O-RING 31,47X1,78 (2125) 3
39 99303700 SCREW M 8x16-5739 4
38 96701600 WASHER 8,4 4
37 50200074 PUMP FOOT 2
W958 3/21/2026 Page 7 - 14
Copyright INTERPUMP GROUP S.P.A
Illustration Hollow shaft (key) Ø28,6 - vers. A
Pos. Code Description Qty Notes
35 92221600 NUT M8X13X5 3
34 44211570 WASHER D. 8 3
33 44040109 PISTON D.18X37.5 3
32 90357200 O-RING 5,28X1,78 SPEC. (2021) 3
31 90502200 ANTI-EXTRUSION RING 3
30 96735000 WASHER D.16X28X1 3
29 97734000 CONNECTING-ROD PIN 3
D.10X29,5
28 98204250 PLUG G1/4"x12 1
27 90358500 O-RING 10,82X1,78 (2043) 1
26 99183700 SCREW M 6x14 UNI 5931 5
25 44160022 REAR CRANKCASE COVER 1
24 90392000 O-RING 101,27X2,62 (3400) 1
23 44030022 CONNECTING ROD 3
22 44050066 PISTON GUIDE 3
19 98210300 OIL DIP-STICK G3/8X51 1
18 44010022 CRANKCASE 1
17 90161400 OIL SEAL 20x30x5 3
16 91833100 BALL BEARING 6305 SKF 1
15 90389800 O-RING 56,82X2,62 (3225) 1
14 53210851 OIL LEVEL GAUGE 1
12 99180700 SCREW M 6x12 UNI 5739 4
11 36711501 INTAKE/DELIVERY VALVE 6
10 98222600 VALVE CAP M24X1,5X17 6
9 90384700 O-RING 20,29X2,62(3081) 6
8 36202551 VALVE CAGE 6
7 94737600 SPRING D. 9,4X14,8 6
6 36200176 VALVE PLATE 6
5 36200366 VALVE SEAT 6
4 90384100 O-RING 17,12X2,62 (3068) 6
2 99317500 SCREW M 8x60 UNI 5931 8
1 44120441 MANIFOLD 1
W958 3/21/2026 Page 8 - 14
Copyright INTERPUMP GROUP S.P.A
Illustration Pump head with VH integrated valve
W958 3/21/2026 Page 9 - 14
Copyright INTERPUMP GROUP S.P.A
Illustration Pump head with VH integrated valve
Pos. Code Description Qty Notes
KIT94 34009401 KIT 94 CHIMJET 1
KR/CONTROLSET
KIT137 34013701 KIT 137 PRESSURE REG. VALVE 1
65 92982800 WING NUT G3/4 1
64 36256951 INLET HOSE BARB FITTING (PL.) 1
63 90382800 O-RING 12,37X2,62 (3050) 1
62 92892500 FILTER D. 12X35 1
61 36318251 INLET NIPPLE G 3/4 1
60 90384100 O-RING 17,12X2,62 (3068) 1
54 36256370 CHEM. INJECTOR VALVE SEAT 1
53 90358500 O-RING 10,82X1,78 (2043) 1
52 36318151 INJECTOR BODY 1
51 36256670 CHEM. HOSE BARB FITTING 1
50 90357000 O-RING 4,48X1,78 (2018) 2
49 36256551 CHEM. REGULATION KNOB 1
48 36256470 INJECTOR SHUTTER 1
47 90358000 O-RING 8,73X1,78 SPEC. (108) 1
46 94738300 SPRING D.9,75X10 1
45 90357200 O-RING 5,28X1,78 SPEC. (2021) 1
44 97478200 BALL 7/32(5,556) STAINLESS 1
43 94821700 TAPER SPRING D.4,3X7,3X11 1
42 90358200 O-RING 9,25X1,78 (2037) 1
41 10015166 NOZZLE D. 2.0 1
41 10007666 NOZZLE DIAM. 2,2 1
34 44120541 MANIFOLD W/VALVE (PIST.D.18) 1
33 98196600 PLUG G1/8X8 1
32 98205700 PLUG M14X1,5X9 1
31 10007870 NIPPLE D. 3 G3/8 1
31 10014770 NIPPLE G3/8 / M22X1,5 BORE 1
D.3
30 90383200 O-RING 13,95X2,62 SPEC. (3056) 1
29 90506500 ANTI-EXTRUSION RING (OR 112) 1
28 90382200 O-RING 9,92X2,62 SPEC. (112) 2
27 36316466 CONTROLSET W1 VALVE SEAT 1
26 99150900 SCREW M5X7.5 STAINLESS 1
W958 3/21/2026 Page 10 - 14
Copyright INTERPUMP GROUP S.P.A
Illustration Pump head with VH integrated valve
Pos. Code Description…
