PumpLookupPump and motor part numbers
Mains Units

NLTI plunger pump

NLT2525SR

  • 25Flow, l/min
  • 250Pressure, bar
  • 1000Speed, rpm
  • 11.8Power, kW

50 or 60 Hz The maker gives figures for both supplies.

Hawk NLTI pump

Specification

Flow
25 l/min (30 l/min at 60 Hz)
Pressure
250 bar
Speed
1000 rpm (1200 rpm at 60 Hz)
Absorbed power
11.8 kW (14.2 kW at 60 Hz)
Shaft side
Right
Shaft
Solid
Weight
15.2 kg
Oil
1.2 litres, SAE 10W40

Kits

Ordinary maintenance2

Part numberDescriptionPer pumpSuppliers
1.099-759.0Plunger seal kit, 20 mm1 
1.905-669.0Complete valve kit1 

Extraordinary maintenance7

Part numberDescriptionPer pumpSuppliers
1.099-763.0Plunger, 20 mm3 
1.099-766.0Plunger oil seal kit1 
1.099-767.0Complete manifold, 20 mm1 
1.904-182.0Connecting rod and plunger rod assembly3 
1.904-251.0Valve plug assembly6 
1.905-613.0Crankcase seal kit1 
1.905-670.0Complete seal packing, 20 mm1 

Tools2

Part numberDescriptionPer pumpSuppliers
1.099-665.0Tool-kit 
1.905-659.0Seal extractor tool-kit 

Exploded view

Hawk exploded view of the NLTI pump, with position numbers
Hawk's drawing. The numbers match the positions in the parts list below. Open the picture to zoom in.

Parts list

Positions are the balloon numbers on Hawk's exploded view. A part with no number of its own comes in the kit shown beside it.

PosPart numberDescriptionQtyIn kit
1 9.850-377.0 Crankcase1
2 Kit only Plunger oil seal3 1.099-766.0
3 Kit only O-ring Ø1.78 x 37.823 1.099-759.0, 1.099-767.0, 1.905-670.0
4 Kit only Pressure ring 20 mm3 1.099-767.0, 1.905-670.0
5 Kit only Low pressure "U" seal Ø20 mm3 1.099-759.0, 1.099-767.0, 1.905-670.0
6 Kit only Intermediate ring 20 mm3 1.099-767.0, 1.905-670.0
7 Kit only High pressure "U" seal Ø20 mm3 1.099-759.0, 1.099-767.0, 1.905-670.0
8 Kit only Copper washer G1/21 1.099-767.0
9 Kit only Plug G1/21 1.099-767.0
10 Kit only Manifold housing Ø201 1.099-767.0
11 Kit only O-ring Ø2.62 x 17.136 1.099-767.0, 1.905-669.0
12 Kit only Valve assembly6 1.099-767.0, 1.905-669.0
13 Kit only O-ring Ø2.62 x 20.246 1.099-767.0, 1.904-251.0, 1.905-669.0
14 Kit only Valve plug6 1.099-767.0, 1.904-251.0
15 Kit only Manifold screw M10 x 80 geomet8 1.099-767.0
16 Kit only Washer Ø10,28 1.099-767.0
17 Kit only Copper washer G3/81 1.099-767.0
18 Kit only Plug G3/82 1.099-767.0, 1.905-613.0
19 Kit only Valve seat6 1.099-767.0, 1.905-669.0
20 Kit only Valve plate6 1.099-767.0, 1.905-669.0
21 Kit only Valve spring6 1.099-767.0, 1.905-669.0
22 Kit only Valve cage6 1.099-767.0, 1.905-669.0
23 9.851-503.0 Hexagonal screw M8 x 208
24 9.851-114.0 Washer6
25 9.850-620.0 Closed bearing housing
26 Kit only O-ring Ø1.78 x 71.122 1.905-613.0
27 9.850-347.0 Roller bearing2
28 9.850-213.0 Single - ended shaft1
30 9.850-446.0 Crankshaft key
31 9.851-287.0 Oil dip stick1
32 Kit only Crankshaft seal 1.905-613.0
33 9.850-546.0 Shim1
34 9.850-610.0 Bearing housing i Ø61
34 9.850-619.0 Bearing housing Ø60
35 Kit only Plunger screw3 1.099-763.0, 1.904-182.0
36 Kit only Bonded seal3 1.099-763.0, 1.904-182.0
37 Kit only Plunger 20 mm3 1.099-763.0
38 Kit only Copper spacer3 1.099-763.0
39 Kit only Plunger rod3 1.904-182.0
40 Kit only Connecting rod3 1.904-182.0
41 Kit only Connecting rod pin3 1.904-182.0
42 Kit only Spring washer Ø66 1.904-182.0
43 Kit only Connecting rod screw M8 x 356 1.904-182.0
44 Kit only O-ring Ø2.62 x 152.071 1.905-613.0
45 9.850-389.0 Crankcase cover1
46 Kit only O-ring Ø1.78 x 141 1.905-613.0
47 Kit only Sight glass, G3/41 1.905-613.0
48 9.851-474.0 Screw M6 x 165

Motor

A 6-pole motor of at least 11.8 kW drives this pump at 1000 rpm on 50 Hz. On a 60 Hz supply a motor with the same poles turns it at 1200 rpm, where it takes 14.2 kW. Order that motor wound for 60 Hz and rated for at least that power.

MotorkWrpmFrameClassA at 400 VSuppliers
RN 180La6 15970IEC 180LIE132  

The contactor and overload relay for each motor are on the motor's page.

Flange

The flange bolts the pump to the face of the motor. It depends on the motor's IEC frame.

  • IEC 180, 48 mm shaft (RN 180La6) No Hawk flange listed for this motor.

Coupling

The flexible coupling joins the motor shaft to the pump shaft inside the flange.

  • IEC 180, 48 mm motor shaft No Hawk coupling listed: you need one for a 48 mm motor shaft to the pump shaft.

Gearbox for engine drive

Other Hawk NLTI pumps

NLT1725ILNLT1725IRNLT2125ILNLT2125IRNLT2525BNLT2525IBNLT2525ILNLT2525IRNLT2525ISBNLT2525ISLNLT2525ISRNLT2525SBNLT2525SLNLT3020IBNLT3020ILNLT3020IR