Stow manual Stow T-20H Maintenance Pump, Pump Vacuum Test

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STOW T-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 T-20H TRASH PUMP — PARTS MANUAL — REV. #0 (05/29/03)

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Contents Model T-20H Trash Pump 2 -STOW T-20H Trash Pump Parts Manual REV. #0 05/29/03 Heres HOW to GET Help Stow T-20H Table of Contents Parts Ordering Procedures When ordering parts Please supply the following informationStow T-20H Safety Message Alert Symbols Accidental Starting General Safety Rules for Safe OperationRules for Safe Operation Specifications Pump Specifications Engine STOWT-20H General Information Stow T-20H Pump Components Stow T-20H Basic Engine Initial ServicingStow T-20H PRE-INSPECTION Engine Stow T-20H PRE-SETUP Pump Read safety instructions at the beginning of manualStow T-20H Initial START-UP Engine Stow T-20H Initial START-UP Engine Stow T-20H Trash Pump Parts MANUAL- REV. #0 05/29/03 Stow T-20H Maintenance Pump Pump Vacuum TestStow T-20H Maintenance Pump Stow T-20H Maintenance Engine Engine Maintenance ScheduleStow T-20H Maintenance Engine STOWT-20H Preparation for Long -TERM Storage Pump StorageStow T-20H Trash Pump Parts MANUAL- REV. #0 05/29/03 Troubleshooting Engine STOWT-20H Troubleshooting ENGINE/PUMP STOWT-20H Explanation of Code in Remarks Column Items Found In the Remarks ColumnStow T-20H Suggested Spare Parts Qty DescriptionStow T-20H Pump Assy Pump Assy 32 -STOW T-20H Trash Pump Parts Manual REV. #0 05/29/03 Part Name QTY Honda GX160K1TX2 Engine AIR Cleaner Dual Assy GASKET, Elbow Honda GX160K1TX2 Engine Camshaft Assy Part Name QTY. Remarks Honda GX160K1TX2 Engine Carburetor Assy Part Name Honda GX160K1TX2 Engine Control Assy ARM, Governor Honda GX160K1TX2 Engine Crankcase Cover Assy GASKET, OIL Filler CAP Honda GX160K1TX2 Engine Crankshaft Assy Crankshaft T-TYPE Honda GX160K1TX2 Engine Cylinder Barrel Assy Includes Items W/ # Honda GX160K1TX2 Engine Cylinder Head Assy CLIP, Valve Guide Honda GX160K1TX2 Engine FAN Cover Assy COVER, FAN *NH1* Black Honda GX160K1TX2 Engine Flywheel Assy FAN, Cooling Honda GX160K1TX2 Engine Fueltank Assy JOINT, Fuel Tank Honda GX160K1TX2 Engine Ignition Coil Assy Coil ASSY., Ignition Honda GX160K1TX2 Engine Muffler Assy Muffler Honda GX160K1TX2 Engine Piston Assy Piston + Rings Assy Honda GX160K1TX2 Engine Recoil Starter Assy REEL, Recoil Starter 64 -STOW T-20H Trash Pump Parts Manual REV. #0 05/29/03 Honda GX160K1TX2 Engine Gasket KIT Assy Honda GX160K1TX2 Engine Labels Assy LABEL, Caution Effective October 1, 2002 Terms and Conditions of Sale Parts Stow T-20H Trash Pump Parts MANUAL- REV. #0 05/29/03 Please have the Model and Serial Number ON-HAND When Calling