Rk1528hn 4 0gpm 4000psi 1450rpm 24mm X 30mm Shaft
RK1528HN 4.0GPM 4000PSI 1450RPM 24mm x 30mm Shaft Sale Price: $483.08

4.0 GPM and 4000 PSI at 1450 RPM make this a solid choice to replace a belt-driven pump on a 13-16 HP power washer.

Rka4g30n 4gpm 3000psi 1750rpm 24mm Shaft
RKA4G30N 4GPM 3000PSI 1750RPM 24mm Shaft Sale Price: $464.03

4.0 GPM and 3000 PSI at 1750 RPM make this a solid choice to replace a belt-driven pump on a 10 - 11 HP power washer.

Rka4g40hn 4gpm 4000psi 1750rpm 24mm Short Shaft 1 Long
RKA4G40HN 4GPM 4000PSI 1750RPM 24mm SHORT SHAFT 1" LONG Sale Price: $485.13

4.0 GPM and 4000 PSI at 1750 RPM make this a solid choice to replace a belt-driven pump on a 13 - 15 HP power washer.

Axd3025g Comet Pump 3 0 Gpm 2500 Psi
AXD3025G Comet Pump; 3.0 GPM, 2500 PSI Sale Price: $296.30

Ideal replacement for a 7 HP power washer! Excellent durability! Designed for a 3/4" shaft.

P317 Giant Triplex Pump 3 7gpm 3000psi 1800rpm
P317 Giant Triplex Pump 3.7GPM 3000PSI 1800RPM Sale Price: $585.00

3.7 GPM, 3500 PSI @ 1800 RPM. Matches up to an 11 - 13 HP engine

Axd4030g Comet Pump 3 75 Gpm 3000 Psi
AXD4030G Comet Pump; 3.75 GPM & 3000 PSI Sale Price: $345.28

This is the big one in the AXD series, and the price is the lowest we've seen for Comet quality! Ideal for use with a 9 or 11 HP engine. Great durability! Accepts 1" shaft.

P316 Giant Triplex Pump 3 9gpm 3000psi 1450rpm 24mm Shaft
P316 Giant Triplex Pump 3.9GPM 3000PSI 1450RPM 24mm Shaft Sale Price: $585.00

4.0 GPM, 3500 PSI @ 1750 RPM. Matches up to a 13 HP engine.

Mc15 20 S Udor Triplex Pump
MC15/20-S Udor Triplex Pump Sale Price: $492.69

4.0 GPM, 3000 PSI @ 1450 RPM combine to deliver a lot of cleaning power when repacing a belt-driven pump on an 11 HP engine.

Axd3030g Comet Pump 3 0 Gpm 3000 Psi
Axd3030G Comet Pump; 3.0 GPM & 3000 PSI Sale Price: $329.23

Ideal replacement pump for an 8 HP pressure washer. Great durability! 1" shaft size.

Mc13 20 S Udor Triplex Pump
MC13/20-S Udor Triplex Pump Sale Price: $492.69

3.5 GPM, 3000 PSI @ 1450 RPM combine to deliver a lot of cleaning power when repacing a belt-driven pump on a 9 HP engine.

Zwd3530g Comet Pump 3 5 Gpm 3000 Psi
ZWD3530G Comet Pump; 3.5 GPM & 3000 PSI Sale Price: $319.60

Great triplex replacement for a direct-drive 9 HP power washer. Accepts 1" shaft.

Md4 0 30 S Udor Triplex Pumpmd4 0 30 S Udor Triplex Pump
MD4.0/30-S Udor Triplex Pump Sale Price: $492.69

4.0 GPM, 3000 PSI @ 1750 RPM combine to deliver a lot of cleaning power when repacing a belt-driven pump on an 11 HP engine.

Zwd3030g Comet Pump 3 0 Gpm 3000 Psi
ZWD3030G Comet Pump; 3.0 GPM & 3000 PSI Sale Price: $319.60

Great triplex replacement for a direct-drive 8 HP power washer. Accepts 1" shaft.

Cat 56 Pump 5 5 Gpm 3500 Psi Pressure Washer Pump
CAT 56 Pump, 5.5 GPM, 3500 PSI Pressure Washer Pump Sale Price: $1,581.68

Superior Design Triplex plunger pump design gives smoother liquid flow V-packings are completely lubricated and cooled by the liquid being pumped Inlet and discharge valve assemblies interchange for easier maintenance Lubricated lo pressure seals provide double protection against external leakage Oil bath crankcase assures optimum lubrication Close tolerance concentricity of the ceramic plunger maximizes seal life Quality materials Precision design 304 Stainless Steel valves and seats are hardened and polished for ultimate seating and extended valve life Forged brass manifold is strong and corrosion resistant Special concentric, high density, polished, graphite impregnated, solid ceramic plungers are abrasion resistant and result in extended seal life Specially formulated CAT PUMP exclusive, v-packings offers unmatched performance and seal life Die cast aluminum crankcase provides high strength, minimum weight and precision tolerance control Chrome moly crankshaft gives unmatched strength and surface hardness crankshaft bearings with greater loading capacity mean longer bearing life Easy Maintenance: Wet end is easily serviced without entering crankcase, requiring less time and effort Valve assemblies are accessible without disturbing piping for quick service Preset packings mean no packing gland adjustment is necessary, reducing maintenance costs  SPECIFICATIONS: Maximum volume: 5.5 GPM Maximum discharge pressure: 3500 PSI Maximum pump speed: 1210 RPM Bore: 18mm Stroke: 24mm Shaft diameter: 24mm Maximum fluid temperature: 160 F Inlet port threads: 1/2" FPT Discharge port threads: 3/8" FPT Weight: 30 lbs

Tsf2221 Hp By General Pump Super High Flow Triplex Pump
TSF2221 HP By General Pump - Super High Flow Triplex Pump Sale Price: $1,007.57

This pump has all of the outstanding construction features of it's brother, the TSF 2021. Incredibly, it is capable of delivering 10.2 GPM and 3000 PSI for amazing cleaning power. Features: Oversized roller bearings Fully anodized crankcase Innovative new seal design extends seal life New plunger design improves thermal shock resistance New valve cap improves hydrostatic performance Find a Parts Breakdown for this pump

Xmv3g25d Ar Pump 3000 Psi For 6 7 Hp Pressure Washers
XMV3G25D AR Pump 3000 PSI For 6-7 HP Pressure Washers Sale Price: $353.28

3.0 GPM and 2500 PSI make this a solid choice to replace a direct-drive pump for a 6 - 7 HP power washer. 3/4" shaft.

Tsf2021 General Pump High Flow Triplex Pump
TSF2021 General Pump-High Flow Triplex Pump Sale Price: $953.00

This pump is rated at 7.0 GPM and 3600 PSI when it is set up @ 1450 RPM or 8.5 GPM and 3600 PSI when it is set up @ 1750 RPM. This is one of the best high-flow designs on the market for high-volume pressure washing. Features: Oversized roller bearings Fully anodized crankcase Innovative new seal design extends seal life New plunger design improves thermal shock resistance New valve cap improves hydrostatic performance  Find a Parts Breakdown for this pump

Xmv3g30d Ar Pump For 7 8 Hp Engine
XMV3G30D AR Pump For 7-8 HP Engine Sale Price: $384.96

3.0 GPM and 3000 PSI make this a solid choice to replace a direct-drive pump on a 7-8 HP power washer.

Zwd3540g Comet Pump 3 5 Gpm 4000 Psi
ZWD3540G Comet Pump; 3.5 GPM & 4000 PSI Sale Price: $417.43

Lots of big performance here! Great triplex replacement for a direct-drive 11 - 13 HP power washer. Accepts 1" shaft.

Zwd4030g Comet Pump 4 0 Gpm 3200 Psi
ZWD4030G Comet Pump; 4.0 GPM & 3200 PSI Sale Price: $312.60

Great triplex replacement for a direct-drive 11 HP power washer. Accepts 1" shaft.

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Pump repair can be a challenge, particularly if you are not experienced at rebuilding. These jobs can take hours to do and usually require a number of various replacement parts. If you are mechanically inclined and have the right tools, you can buy parts and repair kits from us and repair your own pump. Once you have done it, you will never shy away from servicing your own equipment. If the thought of trying to decide which parts need replacement and which ones don't scares you a little, you might consider the easy alternative - a brand new pump!

Unbolt your old pump and bolt the new one on. That's about all there is to it! Why put hundreds of dollars into parts & labor to fix a worn-out pump when you can just remove the old pump and bolt-on a brand new one yourself for a few dollars more?

One thing we cannot do is troubleshoot and diagnose mechanical problems for you. That job belongs to a professional mechanic, not one of our power wash Specialists. Without having the equipment in our shop, we are not willing to offer a guess about what might be wrong with your equipment. If you need help diagnosing the problem, we recommend that you take the equipment to a qualified dealership for service. An alternative would be to visit the web site of the pump manufacturer, where you will often find troubleshooting tips. One last solution - and we think the easiest - is to simply replace the troubelsome pump and unloader with new ones.

NOTE: We always recommend buying a new unloader when you replace the pump. Unloaders are your safety valve, and they wear out regularly. Most folks don?t consider the unloader as a ?wear? part, but it really is. The main element of an unloader is a spring-loaded valve, and operating that valve wears out the spring. We will be happy to recommend an unloader that is matched to your new pump.

There are a lot of choices to make when you consider a new pump. Just because your equipment came with one brand doesn't mean you have to stick with that brand. This is the time when you can custom-tailor your equipment to your specific needs.

There are several good top-level brands to choose from: General (Interpump), Cat, AR, and Comet.

We have experienced great service from all of these brands, but we recommend either the General or AR triplex pumps or Comet axial designs. We have found that these often represent the highest overall value (comparing service life and price) for your dollar. Of course, your personal experience might make you lean to another brand that has given you good service in the past.

The next question: How do you size your pump properly? There are some pretty simple calculations you can use to determine the proper pump for your engine size. The easiest one for most contractors to use is simply to multiply your engine horsepower rating by 1100. This will give you the Cleaning Units (CU's, which is another way of stating GPM x PSI) your engine is rated to deliver.

Manufacturers, through more complex engineering calculations than the simple one I have presented here, have been stretching this calculation to the limits over the years. This lets them offer higher GPM and PSI per horsepower than the calculations seem to indicate. In the worst case scenario that means your 3000 PSI machine might only deliver a ?real world? 2700 PSI, but no one seems to care about that very much.

What this tells you, as you think about replacing your pump, is that you might take the same approach and grab the largest pump your engine will theoretically handle. On the other hand, you could gain more efficiency from your pump (and extend the life of your engine a little) and save a little money by choosing a pump a little closer to the calculated ability of your engine.

If you have an 11 HP engine, for example, it will handle 12,100 Cleaning Units (HP x 1100 = CU's) according to the formula. That means it is rated to deliver 3 GPM @ 4000 PSI or 4 GPM @ 3000 PSI or 3.5 GPM @ 3500 PSI. The perfect match for this 11 HP engine might be a General EZ 3040G, which puts out 12,000 CU?s at 4.0 GPM and 3000 PSI. It is very little stretch for this same 11 HP engine to push a Comet ZWD4030G, which delivers 4.0 GPM @ 3200 PSI. This is close enough to the 11 HP rating that it should work just fine for you.

Our selections for this online store have been limited to the common replacement pumps we deal with all the time. There are hundreds of other pumps available that we do not list here. If you can't find what you want, please call us. We'd love to help you.