High Pressure Plunger Pump · Frame size 7 PFR

56HS

Name: 56HS
Brand: CAT PUMPS
SKU: 56HS

This triplex (three plunger rods) positive displacement, reciprocating plunger pump is constructed with a forged brass manifold, 304 stainless steel valve assemblies, solid ceramic plungers and standard NBR (Buna-N) seals and O-rings. High-strength 304 stainless steel and bronze plunger rods allow higher operating pressure on this "HS" Series pump.

Data sheet (PDF) Make an enquiry

Technical specifications

Flow rate	21 l/min
Operating pressure	245 bar
Speed	1,210 min⁻¹
Inlet port	1/2"
Discharge port	3/8"
Shaft diameter	24 mm
Material	Brass

Downloads

CAD files

Spare parts

Click an item in the drawing or in the parts list to add it to your request list. We turn it into a quotation – no order is placed.

6 kits bundle wearing parts of this pump ↓

Skip the drawing, go to the parts list

Parts list

Item	Part no.	Description	Qty
5	125824	Screw, HHC Sems (M6x16) 8/4STCP	8
8	133571	Cover, BearingALE	1
9	815280	Shim, Split, 2-Piece 2 - 4FBR	1
10	12393	O-Ring, Bearing Cover 2/1NBR
11	43222	Seal, Oil, Crankshaft 2/1/2NBR
15	43221	Bearing, RollerSTL	2
20	48863	Rod, Connecting [6/02]TNM	3
25	43464	Crankshaft, Single End (M24)FCM	1
30	133572	Cover, Bearing, BlindALE	1
32	44666	Cap, Oil Filler, Domed-Gearbox ModelsRTP	1
33	14177	O-Ring, Oil Filler Cap - 70DNBR	1
37	92241	Gauge, Oil, Bubble with Gasket - 80D 1 - 2PC	1
38	44428	Gasket, Flat, Oil Gauge - 80DNBR	1
40	126541	Screw, HHC Sems (M6 x 20)STCP	4
48	25625	Plug, Drain (1/4" x 19 BSP[M])STCP	1
49	23170	O-Ring, Drain Plug - 70DNBR	1
50	133569	Cover, RearALE	1
51	14047	O-Ring, Rear Cover - 70DNBR	1
53	133593	Crankcase (M10)ALE	1
56	43240	Pan, OilPOP	1
64	43237	Pin, CrossheadCM	3
65	48913	Rod, Plunger, Short [5/02]SHS	3
65	49892	Rod, PlungerSBZ	3
69	126589	Washer, Oil SealSTCP	3
70	43228	Seal, Oil, CrankcaseNBR	3
75	43328	Slinger, BarrierS	3
88	45697	Washer, Keyhole (M18 x 10)S	3
90	43232	Plunger (M18 x 77) (Model 530)CC	3
95	126559	Stud, Plunger Retainer (M6 x 70)STCP	3
96	43235	Backup Ring, Plunger RetainerPTFE	3
97	17399	O-Ring, Plunger Retainer - 80DNBR	3
98	45891	Gasket, Plunger Retainer (M12.5)CU	3
99	46504	Retainer, Plunger (M6)S	3
100	45689	Retainer, Seal, 2-PiecePVDF	3
101	43239	Wick, Long TabFBR	3
106	43243	Seal, Low-Pressure with S-SpringNBR	3
120	45685	Case, SealBB	3
121	20285	O-Ring, Seal Case - 70DNBR	3
126	44550	Adapter, FemaleBB	3
127	44549	V-PackingSNG	6
128	45618	Adapter, MaleBB	3
139	43448	Plug, Inlet, (1/2" NPT[M])BB	1
162	43248	Backup Ring, SeatPTFE	6
163	43249	O-Ring, Seat - 80DNBR	6
164	43722	SeatS	6
166	43721	ValveS	6
167	43751	Spring, ValveS	6
168	44564	Retainer, SpringPVDF	6
172	14179	O-Ring, Oil Filler Cap - 70DNBR	6
173	20213	Backup Ring, Valve PlugPTFE	6
174	45939	Plug, Valve, ExtendedBB	6
185	45937	Head, Manifold, (M10)FBB	1
186	49680	Washer, Spring (M10)S	4
188	49679	Screw, HSH (M10 x 35)S	4
500	8071	Gearbox - 1" Shaft (See individual Data Sheet) (Models 56G1, 56HSG1)	1
–	6124	Gasket, Liquid (3 oz. / 0,1 l)	1
–	30067	Key (M8x7.5x25)	1
–	30243	Mount, Direct (Belt-Drive Only)	1
–	30696	Reverse Pliers (Not Shown)	1
–	33005	Socket, Seal Case (1/2" Drive) (Not Shown)	1
–	34334	Kit, Oil Drain (3/8" x 24") (Not Shown) 1	1
–	126610	Mounting, Angle Rail (STZP R)	1
–	814618	Head, Complete with NBR Seals and O-rings	1
–	828710	Protector, Oil Cap with Foam Gasket 1	1
–	6132	Oil, Crankcase, Bottle 1l	1

in the request listcovered by a requested kit

Seal and valve kits

A kit bundles the wearing parts of one assembly. Selecting it highlights the items it covers in the drawing and the parts list – once requested, they stay marked.

Seal kits

Seal kit
30799
NBR (STD)Medium Nitrile (Buna-N)
contains 5 items · one kit per pump
Parts list
- 9717399O-Ring, Plungerhalter3×
- 10143239Ölfilz3×
- 10643243Dichtung, Niederdruck3×
- 12120285O-Ring, Dichtungsgehäuse3×
- 12744549V-Packung6×
Seal kit
34237
FPM (0.0110)Fluorocarbon
contains 5 items · one kit per pump
Parts list
- 9714160O-Ring, Plungerhalter3×
- 10143239Ölfilz3×
- 10644926Dichtung, Niederdruck3×
- 12111693O-Ring, Dichtungsgehäuse3×
- 12745617V-Packung6×
Seal kit
76799
HT (0.3000)Hi-Temp (EPDM Alternative)
contains 5 items · one kit per pump
Parts list
- 9717399O-Ring, Plungerhalter3×
- 10143239Ölfilz3×
- 10643243Dichtung, Niederdruck3×
- 12120285O-Ring, Dichtungsgehäuse3×
- 12748300V-Packung6×
Seal kit
76826
STHT (0.3400)Special PTFE High Temp
contains 5 items · one kit per pump
Parts list
- 9717399O-Ring, Plungerhalter3×
- 10143239Ölfilz3×
- 10676243Dichtung, Niederdruck3×
- 12120285O-Ring, Dichtungsgehäuse3×
- 12748300V-Packung6×

Valve kits

Valve kit
33820
NBR (STD)Medium Nitrile (Buna-N)
contains 16 items · 2 kits per pump
Parts list
- 16243248Backup Ring, Seat3×
- 16343249O-Ring, Ventilsitz3×
- 16343248Backup Ring, Seat3×
- 16443722Ventilsitz3×
- 16443249O-Ring, Seat3×
- 16643721Ventil3×
- 166437223×
- 16743751Feder, Ventil3×
- 16743721Valve3×
- 16844564Federhalter, Ventil3×
- 16843751Spring3×
- 17215855O-Ring, Ventilstopfen3×
- 17214179O-Ring, Valve Plug3×
- 17244564Retainer, Spring3×
- 17320213Stützring, Ventilstopfen3×
- 17314179O-Ring, Valve Plug3×
Valve kit
34238
FPM (0.0110)Fluorocarbon
contains 15 items · 2 kits per pump
Parts list
- 16243248Backup Ring, Seat3×
- 16344383O-Ring, Ventilsitz3×
- 16343248Backup Ring, Seat3×
- 16443722Ventilsitz3×
- 16444383O-Ring, Seat3×
- 16643721Ventil3×
- 166437223×
- 16743751Feder, Ventil3×
- 16743721Valve3×
- 16844564Federhalter, Ventil3×
- 16843751Spring3×
- 17215855O-Ring, Ventilstopfen3×
- 17244564Retainer, Spring3×
- 17320213Stützring, Ventilstopfen3×
- 17315855O-Ring, Valve Plug3×