®

3 Frame
Piston Pump
Models 280
290
Model 280 shown SPECIFICATIONS U.S. Measure Metric Measure

MODEL 280
Flow..................................................................3.0 GPM (11.4 L/M)
FEATURES Pressure Range....................................100 to 1000 PSI (7 to 70 Bar)
RPM ..............................................................1330 RPM (1330 RPM)
Stroke...................................................................0.394" (10 mm)
Superior Design Weight...............................................................11.7 lbs. (5.3 kg)
● Triplex Uniflow design provides continuous forward liquid flow
MODEL 290
for smooth operation. Flow..................................................................3.5 GPM (13.2 L/M)
● Wetted cups and floating pistons are lubricated and cooled by Pressure Range....................................100 to 1200 PSI (7 to 85 BAR)
RPM ..............................................................1200 RPM (1200 RPM)
pumped liquid for long cup life. Stroke...................................................................0.472" (12 mm)
● Mechanically actuated inlet valves give strong lift and easy prime. Weight...............................................................12.1 lbs. (5.5 kg)
● 304 stainless steel discharge valves for wear resistance. COMMON SPECIFICATIONS
Inlet Pressure Range ..............................– 8.5 to 40 PSI (–0.6 to + 2.8 BAR)
● Oil bath crankcase assures optimum lubrication. Bore......................................................................0.787" (20 mm)
● 100% wetted seal design allows pumped liquid to cool and lubricate Crankcase Capacity .............................................10 oz. (.3 L)
Maximum Liquid Temperature ..............................160°F (71°C)
for longer life. Above 130°F call CAT PUMPS for inlet conditions and elastomer recommendations.
Inlet Port (1) ...................................................1/2" NPTF (1/2" NPTF)
Quality Materials Chemical Injection Port (1) ............................1/4" NPTF (1/4" NPTF)
● Cylinder and sleeve wear surfaces are hard chrome plated 304 Discharge Ports (2)........................................3/8" NPTF (3/8" NPTF)
stainless steel for maximum durability and abrasion resistance. Discharge Port (1)..........................................1/2" NPTF (1/2" NPTF)
Pulley Mounting.............................................Either side (Either side)
● Chrome plated, brass manifolds and optional stainless steel Shaft Diameters ...................................................0.650" (16.5 mm)
manifolds are strong and corrosion resistant. Dimensions (280) ...........................10.63 x 8.79 x 5.30" (270 x 223x 134.5 mm)
Dimensions (290) ...........................10.83 x 8.79 x 5.30" (275 x 223x 134.5 mm)
● Special high strength TNM connecting rods offer superior bearing
quality strength. ELECTRIC HORSEPOWER REQUIREMENTS
● Chrome-moly crankshaft gives unmatched strength and surface MODEL FLOW PRESSURE MOTOR PULLEY SIZE
hardness. PSI PSI PSI Using 1725 Nom.RPM Motor
● Oversized crankshaft bearings with greater loading capacity mean 800 1000 1200 & 5.0" Pump Pulley O.D.
longer bearing life. U.S. BAR BAR BAR RPM Pulley
GPM L/M 55 70 85 O.D.
Easy Maintenance 280 3.0 11.4 1.6 2.1 N/A 1330 3.9
● Stepped stainless steel piston rod with chrome-plated, stainless steel 2.5 9.5 1.4 1.7 N/A 1108 3.2
sleeve allows easy replacement from front of pump. 2.0 7.6 1.1 1.4 N/A 887 2.8
● All wet-end wear parts are easily serviced without entering crankcase, 290 3.5 13.2 1.9 2.4 2.9 1200 3.5
3.0 11.4 1.6 2.1 2.5 1029 3.0
requiring less time and effort.
2.5 9.5 1.4 1.7 2.1 858 2.5
● Wear parts are available in convenient kits.
DETERMINING Rated G.P. M. = “Desired” G.P. M.
THE PUMP R.P.M. Rated R.P. M. “Desired” R.P. M.
DETERMINING GPM x PSI = Electric Brake
WARNING THE REQUIRED H.P. 1460 H. P. Required
All systems require both a primary pressure regulating device (i.e., regulator, unloader) and
a secondary pressure safety relief device (i.e., pop-off valve, safety valve). Failure to DETERMINING Motor Pulley O.D. = Pump Pulley O.D.
install such relief devices could result in personal injury or damage to the pump or to MOTOR PULLEY SIZE Pump R.P.M. Motor R.P.M.
system components. CAT PUMPS does not assume any liability or responsibility for the
See complete Drive Packages [Inclds: Pulleys, Belts, Hubs, Key] Tech Bulletin 003.
operation of a customer’s high pressure system.
Refer to pump Service Manual for repair procedure, additional technical information and pump warranty.

“Customer confidence is our greatest asset”

 PARTS LIST
ITEM PART NUMBER DESCRIPTION QTY
280 MATL 290 MATL
2 30047 STL 30047 STL Key (M5x5x24) 1
5 92519 STZP 92519 STZP Screw, HHC Sems (M6x16) 8
125824 STCP R 125824 STCP R Screw, HHC Sems (M6x16) 8
8 27950 AL 27950 AL Cover, Bearing 2
10 26536 NBR 26536 NBR O-Ring, Bearing Cover - 70D 2
11 24159 NBR 24159 NBR Seal, Oil, Crankshaft 2
15 14487 STL R 14487 STL R Bearing, Ball 2
20 122041 TNM 48867 TNM Rod, Assy Connecting [280-8/02, 290-9/02] 3
25 26239 FCM 43804 FCM Crankshaft 1
31 828710 — 828710 — Protector, Oil Cap w/Foam Gasket 1
32 43211 ABS 43211 ABS Cap, Oil Filler 1
33 14177 NBR 14177 NBR O-Ring, Oil Filler Cap - 70D 1
37 92241 — 92241 — Gauge, Oil Bubble w/Gasket - 80D 1
38 44428 NBR 44428 NBR Gasket, Flat, Oil Gauge - 80D 1
40 92520 STZP 92520 STZP Screw, HHC Sems (M6x20) 4
126541 STCP R 126541 STCP R Screw, HHC Sems (M6x20) 4
48 25625 STCP 25625 STCP Plug, Drain (1/4"x19BSP) 1
49 23170 NBR 23170 NBR O-Ring, Drain Plug - 70D 1
50 43339 AL 43339 AL Cover, Rear 1
51 43340 NBR 43340 NBR O-Ring, Rear Cover 1
53 44658 AL 44658 AL Crankcase, 4 Screws 1
55 126546 STCP R — — Stud (M8x41.4) 2
64 16948 CM 16948 CM Pin, Crosshead 3
65 29612 SZZ 101800 SZZ Rod, Piston 3
69 126259 STCP R 126259 STCP R Washer, Oil Seal 3
70 25301 NBR 25301 NBR Seal, Oil - 80D 3
71 126189 STCP R 126189 STCP R Washer, Oil Seal 3
75 25327 S 25327 S Slinger, Barrier 3
77 25392 NBR 25392 NBR O-Ring, Sleeve 6
28771 FPM 28771 FPM O-Ring, Sleeve 6
80 29614 SCP 29614 SCP Sleeve 3
29743 S 29743 S Sleeve (Unchromed) 3
81 — — 29003 PTFE Back-up-Ring, Sleeve 3
100 28597 PVDF 28597 PVDF Retainer, Seal 3
106 30315 NBR 30315 NBR Seal, LPS, Prrrrrm-A-Lube 3
30325 FPM 30325 FPM Seal, LPS, Prrrrrm-A-Lube 3
109 22177 BBCP 22177 BBCP Plug HH (I/4" NPT) 1
110 25128 BBCP 25128 BBCP Manifold, Inlet 1
25635 SS 25635 SS Manifold, Inlet 1
117 — — 85680 STZP Stud (M8x99.5) 2
118 22160 BBCP 22160 BBCP Elbow (1/2" NPT) 1
119 27004 S 27004 S Valve, Inlet 3
130 22021 S 30543 S Piston 3
131 — — 30544 PTFE Bac-Cup Ring 3
133 43172 FPM 43172 FPM Cup, Piston 3
133 — — 43474 FPM Assy, Bac-Cup (Inclds: 130, 131, 133) (290 Only) 3
133 29089 SNG 29089 SNG Cup, V-Hot 3
135 27003 S 27983 S Spacer, Piston 3
136 27002 S 27002 S Retainer, Piston 3
137 27006 S 27006 S Washer, Conical (M6) 3
138 27000 S 27000 S Nut (M6) 3
139 14158 S 14158 S Cotterpin (M1.6x10) 3
143 23172 NBR 23172 NBR O-Ring, Cylinder -70D 6
11377 FPM 11377 FPM O-Ring, Cylinder -80D 6
26961 PTFE 26961 PTFE O-Ring, Cylinder 3
150 26112 SCP 101802 SCP Cylinder 3
28774 S 43834 S Cylinder (Unchromed) 3
153 — — 21985 PTFE Back-Up-Ring, Cylinder 3
164 43434 S 43434 S Seat, Q.V. 3
29487 S 29487 S Seat, F.V. 3
166 43723 S 43723 S Valve, Q.V. 3
22842 S 22842 S Valve, F.V. 3
167 43360 S 43360 S Spring, Q.V. 3
22031 S 22031 S Spring, F.V. 3
168 43442 S 43442 S Retainer, Spring, Q.V. 3
22841 S 22841 S Retainer, Spring, F.V. 3
184 — — 81109 STZP Nut, Hex (M8) 2
— — 126521 STCP R Nut, Hex (M8) 2
185 24459 BBCP 24459 BBCP Manifold, Discharge 1
25634 SS 25634 SS Manifold, Discharge 1
186 15845 STZP — — Lockwasher (M8) 2
126232 STCP R — — Lockwasher (M8) 2
187 26245 STZP — — Bolt, Cylinder (M8x62.5) 2
126565 STCP R — — Bolt, Cylinder (M8x62.5) 2
188 126813 STCP R — — Shim (M8x13x1.0) 2-4
189 126576 STCP R — — Shim (M8x13x0.5) 2-4
190 43258 STZP — — Shim (M8x13x0.3) 2-4
126590 STCP R — — Shim (M8x13x0.3) 2-4
191 43425 STZP — — Shim (M8x13x2.0) 2-4
126591 STCP R — — Shim (M8x13x2.0) 2-4
192 26676 S — — Lockwasher (M8) 2
 EXPLODED VIEW

Models
Standard - 280, 290
Stainless Steel - 281, 291
February 2008
280 MATL 290 MATL
194 126201 STCP R 126201 STCP R Nut, Hex Flange (M8) 2
196 22187 BBCP 22187 BBCP Plug HH (3/8" NPT) 1
250 25130 STCP 25130 STCP Protector, Shaft 1
260 30612 STZP 30612 STZP Assy, Angle Rail 1
270 30246 STL 30246 STL Pulley Assy (Inclds: 30032, 30047) 1
275 30942 STL 30942 STL Hub & Key Assy (Inclds: 30943, 30047) 1
283 34334 — 34334 — Kit, Oil Drain 1
298 34961 STZP 34961 STZP Clutch, Assy, Single Groove, 16.5mm, 12VDC 1
34964 STZP 34964 STZP Clutch, Assy, Dual Groove, 16.5mm, 12VDC 1
300 30023 FPM 76023 FPM Kit, Cup (Inclds: 133, 139, 143, 355) 1
302 30202 NBR 30860 NBR Kit, Piston (Inclds: 119-139, 143, 153, 355) 1
304 30272 NBR 30272 NBR Kit, Hot Cup (Inclds: 133, 139, 143) 1
305 30431 NBR 30431 NBR Kit, Sleeve & Seal (Inclds: 75, 77, 80, 106, 139) 1
306 30305 NBR 30305 NBR Kit, Seal (Inclds: 106, 139) 1
310 30686 NBR 30686 NBR Kit, Valve, Q.V. (Inclds: 143, 164, 166, 167, 168) 1
30024 NBR 30024 NBR Kit, Valve, F.V. (Inclds: 143, 164, 166, 167, 168) 1
355 22130 NY 22130 NY Inserter, Cup 1
6107 — 6107 — Oil, Bottle (21 oz.) ISO 68 Multi-viscosity Hydraulic 1
(Fill to specified crankcase capacity prior to start-up)
Bold print part numbers are unique to a particular pump model. Italics are optional items. [ ] Date of latest production change. R Components comply with RoHS Directive.
See Tech Bulletins 002, 003, 012, 016, 017, 020, 024, 026, 030, 033, 034, 036, 074, 077 and 083 for additional information.
All Q.V. parts are necessary for conversions, Q.V. and F.V. parts cannot be mixed.
MATERIAL CODES (Not Part of Part Number): ABS=ABS Plastic AL=Aluminum BBCP=Brass/Chrome Plated CM=Chrome-moly FCM=Forged Chrome-moly
FPM=Fluorocarbon NBR=Medium Nitrile (Buna-N) NY=Nylon PTFE=Pure Polytetrafluoroethylene PVDF=Polyvinylidene Fluoride S=304SS SCP=304SS/Chrome Plated
SNG=Special Blend (Buna) SS=316SS STCP=Steel/Chrome Plated STL=Steel STZP=Steel/Zinc Plated SZZ=304SS/Zamak TNM=Special High Strength
 10.63 (270) 280 10.83 (275) 290
7.97 (202.50) 280 8.17 (207.50) 290 2.66 (67.50)
8.79 (223) 7.11 (180.50) 280 7.30 (185.50) 290
(2) 3/8" NPTF 2.28 (58) (1) 1/2" NPTF 6.00 (152.50)
DISCHARGE DISCHARGE (1) 1/4" NPTF 5.04 (128.00)
CHEMICAL INJECTOR

.94 (24)

1.10 (28)
.650 (16.50)
5.30
(134.50)
2.95 2.32 (58.88)
(75)
(1) 1/2" NPTF INLET 1.30 (33)

5.968 (152) 4 - 09
1.57 3.94 (100) .312 (8) .79 (20)
(40)
.79 (20)
1.97 (50) 1.375 3.94 (100.00) 4-M6 x 30
.31 (8)
1.063 (35) 4.98 (126.50)
(27)

1.375 2.562 1.375

(35) (65) (35) RAIL 26246

Models 280, 290

9 1
8 12
9 2
11 10 8 6 7 5 4
13 3

1 Die cast aluminum crankcase means 5 The piston rods are high tensile strength 9 Manifolds are of high tensile strength
high strength, lightweight, and excellent 304 stainless steel with Zamak crossheads. chrome-plated brass or 316 stainless
tolerance control. 6 The stainless steel slinger provides back- steel for special corrosion resistance.
2 Oversized crankshaft bearings pro- up protection for the crankcase seal, keep- 10 100% wet cup/seal design adds to service
vide extended bearing life and pump ing pumped liquids out of the crankcase. life by allowing pumped liquids to cool and
performance. 7 The patented stepped piston rod with lubricate the elastomers on both sides.
3 Chrome-moly crankshaft provides hard chrome-plated stainless steel 11 304 stainless steel valves, seats, and
unmatched strength and surface hard- sleeve provides a durable wear surface springs provide corrosion-resistance,
ness for long life. and easy wet-end servicing. ultimate seating and extended life.
4 Matched oversized TNM connecting 8 The cylinder and sleeve wear surfaces 12 Crossheads are 360° supported for
rods noted for superior tensile strength are hard chrome-plated 304 stainless uncompromising alignment.
and bearing quality. steel for longer service life. 13 Mechanically actuated inlet valves
provide strong lift and easy prime.

Products described hereon are covered by one or more of the following U.S. patents 3558244, 3652188, 3809508, 3920356, 3930756 and 5035580

World Headquarters CAT PUMPS (U.K.) LTD.

1 Fleet Business Park, Sandy Lane, Church Crookham
CAT PUMPS FLEET, Hampshire, GU52 8BF, England
1681 - 94th Lane N.E. Minneapolis, MN 55449 - 4324 Phone Fleet 44 1252-622031 — Fax 44 1252-626655
e-mail: sales@catpumps.co.uk
Phone (763) 780-5440 — FAX (763) 780-2958 N.V. CAT PUMPS INTERNATIONAL S. A.
e-mail: techsupport@catpumps.com Heiveldekens 6A, B-2550 Kontich, Belgium
www.catpumps.com The Pumps with Nine Lives Phone 32- 3- 450.71.50 — Fax 32-3- 450.71.51
e-mail: cpi@catpumps.be www.catpumps.be
International Inquiries CAT PUMPS DEUTSCHLAND GmbH
FAX (763) 785-4329 Buchwiese 2, D-65510 Idstein, Germany
Phone 49 6126-9303 0 — Fax 49 6126-9303 33
e-mail: intlsales@catpumps.com e-mail: catpumps@t-online.de www.catpumps.de

PN 993138 Rev C 1821