PORTA-WASHER - MODEL P 1.3.2 Piston Rod Wicks: 1.1 Specifications: Applies only to units shipped prior to 7-15-75. Prior to initial Volume ........3.0 GPM (11.5 liter/min.) operation, saturate wicks with approximately 60 drops of oil in Maximum Pressure ..... 600 psi each of the three lubricator housing holes.
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Principle of Operation – Model P Figure 1...
OPERATION - MODEL P WARNING: Pump Must Not Be Run Dry Make certain water supply to Porta-Washer is “on” . Do not operate unit with H.P. Gun in Off position for more than 5 minutes. Unit must be completely drained of water before expo- sure to freezing temperatures.
2.1 Pressure Adjustment: STEM Attach pressure gauge (optional) and bushing to 3/8” outlet on the head of the pump (Figure 2) . To adjust pressure, use HEX-NUT wrench to secure stem of unloader valve and prevent it from turning, adjust using wrench on 1/2” hex nut at end of spring to increase or decrease pressure (tighten to increase pres- sure, loosen to decrease pressure) .
2.3 Product Recommendations: 2.5 Foam Adjustment: The Porta-Washer Model P is capable of dispensing liquid products. However, the most efficient type of product in nearly all high pressure cleaning applications is mild, general pur- pose cleaner which is high in wetting agent content. Acid product are beneficial in certain applications such as lime scale removal.
PORTA-WASHER - MODEL S 3.1 Specifications: 3.3.2 Piston Rod Wicks: Applies only to units shipped prior to 7-15-75. Prior to initial Volume ........3.0 GPM (11.5 liter/min.) operation, saturate wicks with approximately 60 drops of oil in Pressure ........600 psi each of the three lubricator housing holes.
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Principle of Operation – Model S Figure 3 Auxiliary Accessories – Model S Magnu-Matic Part Number 9332-7005 Device which automatically maintains proper level in solution drum and meters desired amount of liquid product into that solution.
OPERATION - MODEL S WARNING: Pump Must Not Be Run Dry Before starting the Porta-Washer Model S, read the following warnings and cautions carefully: 1. WARNING: High-pressure sprays and hot liquid sprays can cause serious bodily injury. NEVER Allow children or unauthorized personnel to handle equipment.
4.1 Pressure Adjustment: Attach pressure gauge (optional) and bushing to 3/8” outlet on the right side of discharge hose (Figure 6) . Loosen and move pressure clamp to a new position on the bypass hose. Start pump and adjust pressure to 600 psi while drawing from the drum.
SERVICING THE PUMP SECTION - MODEL P AND MODEL S Model P & S – Remove pump discharge hose (Figure 5) DISCHARGE HOSE - first, disconnect at swivel fitting which secures hose to “WASH/RINSE” valve manifold; second, disconnect hose COPPER from pump.
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Remove the three pump cylinders by pulling straight out PUMP CYLINDERS (Figure 9) . Keep these in exact order from left to right as they must be replaced in their original position. Figure 9 Remove cups; PISTON SHAFT (ROD) Remove cotter pin and piston retainer nut (castellated PISTON SLEEVE nut) from the piston shaft (Figure 10) .
Replacing Manifold Piston Rod Seals (seal leak permits STUDS water to enter oil wick area). Remove studs as shown in photo (Figure 12) . Figure 12 Remove inlet Manifold by pulling straight away from pump (Figure 13) . INLET MANIFOLD Figure 13 Seals can be removed from manifold using a 1/2”...
Once the pumping section is disassembled carefully in- spect the following items. INLET Inspect inlet valves and inlet valve surfaces (Figure 8) . If MANIFOLD inlet valve is pitted or damaged, replace it. PISTON ROD SEAL If the major diameter of the piston next to the cup has a sharp edge or if the piston inlet surface is pitted or damaged, replace piston (Figure 11) .
5.2 Reassembly Instructions: THERMAL After the above has been completed, it is time to reassemble OVERLOAD the pumping section. The preceding photographs and draw- SWITCH ings can aid you in reassembling the pumping section. Re- place the valve inlet, piston spacer, piston and cup, the piston retainer, cup washer, and the piston retainer nut - tighten nut snugly.
SERVICING DRIVE BELT - MODEL P AND MODEL S Check drive belt for proper tension. Maximum deflection of belt drive, at center of span, should be 1/4”. If for any reason the pump or motor should be moved or replaced, align the pulleys using a straight edge. For proper tension and motor alignment, loosen motor locking nuts and use motor adjusting bolt on the motor base for correct positioning.
ROUTINE MAINTENANCE SCHEDULE - MODEL P AND MODEL S Add 30 drops of oil to each hole on the pump every week or 100 operating hours. Applies only to units shipped prior to 7-15-75. FILL OIL TO Every 60 days of 200 hours, change crankcase oil with RED DOT ON CAT OIL - Part Number 9490-2269 (Figure 19) .
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Hypro Unloader Valve (Figures 21 and 22) . Figure 21 NORMAL OPERATION: Liquid enters through inlet port at side of unloader, forcing outlet valve open. Liquid flows through outlet port and on through discharge line. Figure 22 PARTIAL BY-PASS WHILE SPRAYING: If the orifice in the spray nozzle is too small to take all of the pump’s capacity, pressure will build up in the plunger chamber.
TROUBLESHOOTING Symptom Possible Cause Action Low Pressure Worn Nozzle. Replace Nozzle - Part #8531- 1777. This is the only nozzle that will allow proper operation of the Porta-Washer. Belt Slippage. Tighten or replace: use correct belt. Unloader valve stuck, partially Clean, readjust unloader valve, plugged or improperly adjusted: check for worn and dirty valve...
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Symptom Possible Cause Action Oil leaking from underside of May be caused by excessive Wipe free of oil. Do not oil lubrica- crankcase (wick style only) oiling of the wick lubricators. tors for a short period. If leakage continues, replace the crankcase piston rod seals.
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