STOW CP-20H — MAINTENANCE (PUMP)

Pump Vacuum Test

CAUTION :

DO NOT attempt to start the engine unless the pump has previously been primed with water. Severe pump damage will occur if pump has not been primed.

To perform the pump vacuum test do the following:

1.Remove the pump fill cap (Figure 2), and fill the pump with water.

2.Start the engine as outlined in the initial start-up section, and wait for the pump to begin pumping.

3.As shown in Figure 17 (next page), place a water hose inside the discharge opening of the pump, and turn on the water. This flow of water into the discharge opening will prevent the pump from running dry.

4.Place the Pump Vacuum Tester (P/N 7000030) over the pump suction (inlet) opening (Figure 17) with the vacuum gauge facing upwards. It may be necessary to apply a small amount of water around the rubber seal of the vacuum tester to make a good suction fit.

5.Check and make sure that there are no air leaks between the vacuum tester and the inlet port on the pump. If air leaks are present reseat vacuum tester.

6.Run the pump for a few minutes while monitoring the vacuum gauge. If the gauge indicates a reading between -25 and -20 in. Hg. (inches of mercury) then it can be assumed that the pump is working correctly.

25 in. Hg (inches of mercury)

NOTE translates into 25 feet of lift at sea level.

7.If the vacuum tester gauge indicates a reading below -20 in. Hg, it can then be assumed that the pump is not functioning correctly, and corrective action needs to be taken.

6.To test the flapper valve, shut down the engine. The vacuum tester should remain attached to the pump suction inlet port by vacuum. This indicates the pump's flapper valve is seating properly to hold water in the suction hose when the engine is stopped.This prevents backflow and allows for faster priming when the engine is restarted.

Adjusting Impeller Clearance

1.If it is necessary to replace impeller or volute, be sure clearance between impeller and volute is adjusted correctly.

2.The impeller should be as close to the volute as possible without rubbing against it. Clearance is adjusted by adding or removing shims from behind the impeller.

3.Check clearance between impeller and insert by slowly pulling starter rope to turn impeller. Remove spark plug to make it easier to turn impeller.

It is important not to remove too many shims or the clearance

NOTE between the impeller and volute will become too wide and pump performance will be reduced. Remember as the impeller wear

down, additional shims may be required to maintain the clearance between the impeller and insert.

4.Check the impeller every six months for wear, and for clearance between the impeller face and the volute. Also check the shaft seal for wear, as well as the shaft sleeve.

Pump Cleaning

After pumping water containing large amounts of dirt and debris, perform the following:

1.Remove the drain plug from the pump housing (Figure 2) and drain any water left in the pump.

2.Loosen the two locking hand knobs (turn counter- clockwise) and remove clean-out cover.

3.Clean and remove dirt, debris from pump casing. Inspect impeller and volute for wear. Replace any damaged or worn parts.

CAUTION :

The impeller may develop sharp edges. Use extreme care when cleaning around the impeller to prevent being cut.

PAGE 20 — STOW CP-20H CENTRIFUGAL PUMP — PARTS MANUAL — REV. #0 (05/30/03)

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Stow manual Stow CP-20H Maintenance Pump
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CP-20H specifications

The Stow CP-20H is a versatile and robust compact tractor designed for a variety of agricultural tasks, combining efficiency, ease of use, and advanced technology. This model is particularly favored by small to mid-sized farm operations, landscaping companies, and hobby farmers due to its compact size and powerful performance.

One of the standout features of the Stow CP-20H is its reliable 20 horsepower engine, which provides ample power for a range of implements and attachments. The engine is designed for fuel efficiency, helping users to minimize operational costs while maximizing productivity. The unit is equipped with a hydrostatic transmission, which allows for seamless speed adjustments without the need for manual gear shifting. This feature provides enhanced maneuverability, making it easier to navigate tight spaces and perform delicate tasks.

The Stow CP-20H also excels in terms of comfort and usability. The operator’s platform is spacious and ergonomically designed, featuring a high-backed seat that reduces fatigue during extended periods of use. Additionally, the controls are intuitively laid out, allowing for easy access and operation. The tractor's compact design ensures a tight turning radius, which is beneficial when working in confined areas.

One of the technological highlights of the CP-20H is its hydraulic system, which maximizes lifting capability and implement performance. With a strong lift capacity, the tractor can handle a variety of attachments such as loaders, backhoes, and mowers, making it an excellent multi-tasker. The three-point hitch system is also noteworthy, as it allows for quick attachment and detachment of implements.

In terms of safety and durability, the Stow CP-20H is built with a sturdy frame and well-designed protective features. It is equipped with ROPS (Roll Over Protection Structure) to enhance operator safety in uneven terrain. The tractor's construction is designed to withstand the rigors of daily use, ensuring longevity.

Overall, the Stow CP-20H stands out as a reliable compact tractor that combines power, versatility, and user-friendly features. Its advanced technology and robust design make it an ideal choice for those seeking an efficient solution for various agricultural and landscaping tasks. Whether it’s mowing fields, plowing gardens, or transporting materials, the Stow CP-20H is equipped to handle the demands of diverse farming projects effortlessly.
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