3 - Wacker Neuson Group

More documents

Recommendations

Info

5 PD SERIES PUMPS PT / PG / PD REPAIR 5.15 Inspecting Pump Before disassembling pump, check for conditions both outside and inside the pump which could affect performance. Inspecting Outside Pump: CHECK THAT THE PUMP IS OPERATING WITHIN SPECIFICATIONS. Remember that as suction lift and discharge head increases, pump output is reduced. On the PD Series Pumps, discharge head CANNOT exceed 25' (7.6m). CHECK TYPE OF FLUID BEING PUMPED. Although the PD Series Pumps are designed to handle heavy sludges and muddy water, the mixture must be fluid enough to flow freely. CHECK SUCTION HOSE FOR LEAKS OR DAM- AGE. A puncture or tear above the water line will make the pump difficult or impossible to prime. CHECK THAT SUCTION HOSE IS CORRECT TYPE. Suction hose must have strong rigid walls. Thinwalled collapsible hoses like those used on the discharge side cannot be used. CHECK THAT STRAINER HOSE LINES ARE NOT BLOCKED OR RESTRICTED. Remove any dirt, debris or vegetation which might interfere with pump flow. If possible, flush hose lines with clear water at the end of each operation and suspend strainer in water, rather than rest on sandy or muddy bottom. Check that discharge hose is not kinked. CHECK THAT ALL FITTINGS AND HOSE CLAMPS ON SUCTION LINE ARE TIGHT AND SEALING PROPERLY. Fittings and clamps may loosen during operation. Add additional clamps where necessary to ensure good seal. CHECK THAT SUCTION HOSE RUNS EVEN WITH OR DOWN HILL FROM PUMP. If the suction line is elevated above pump inlet, back pressure in the hose may prevent pump inlet valve from sealing. Discharge rate is reduced. CHECK THAT PRIME PLUG IS TIGHT. PRIME FOR HIGH LIFTS OR WHEN VALVE RUBBERS ARE DRY, TO IMPROVE SUCTION UPON INITIAL START-UP. 5-12 Inspecting Inside Pump: CHECK THAT BOLTS AROUND DIAPHRAGM ARE SECURE AND TIGHTENED EVENLY. A loose bolt will prevent a good seal around gasket. CHECK ENGINE OPERATING SPEED. 3000 ±100 RPM As engine operating RPM falls, pump capacity and discharge head are reduced. CHECK FLAPPER VALVE AND INLET PORT FOR LEAKS OR DAMAGE. If flapper valve is worn or distorted it may not seal tightly. Inspect threads on inlet port nipple for deep scratches which could allow air leaks. CHECK FOR DEBRIS AND DIRT INSIDE PUMP CASING. Dirt and debris trapped under the diaphragm may interfere with its operation. This may occur if a strainer was not attached to the suction line, allowing large particles to enter the pump box. Always attach a strainer to suction hose. Large solids can also form under the diaphragm, if sludge or mud from last application is allowed to harden in pump box without being flushed. CHECK DIAPHRAGM FOR CRACKS, PUNCTURES OR TEARS. A damaged diaphragm will not produce sufficient suction or discharge pressure. CHECK PUMP SUCTION WITH VACUUM GAUGE. If gauge reading is above 16 in. Hg (55 KPa), problem is probably outside the pump, in hose line or fitting.
PT / PG / PD REPAIR PD SERIES PUMPS 5 5.16 Flapper Valve Recommended tools: Socket wrench - 3/8" Screwdriver Removal: 1. Remove two screws (1) and washers (2) mounting either the suction (inlet) port (3) or discharge port (4) to pump water box (5). 2. Remove flapper valves (6). 3. Remove large weights (7) and small weights (8) from each side of flapper valve. 1 2 6 9 4 10 7 8 Installation: 1. Install new flapper valve assembly, with small weight (8) toward intake side of each valve. 2. Tighten screws (9) on valve weights until rubber begins to compress. CAUTION: DO NOT overtighten. Overtightening may distort rubber gasket, preventing it from sealing properly. 3. Use dowel pins (10) on pump water box (5) and position flapper valves. 4. Mount suction (inlet) port (3) or discharge port (4) to pump using screws (1) and washers (2). Torque to 16–20 ft.lbs (22–27 Nm). CAUTION: DO NOT overtighten. Overtightening may distort flapper gasket causing an air leak at inlet port. 6 8 5 9 7 2 1 10 3 1033SD82 5-13
Page 1:
www.wackergroup.com REPAIR MANUAL 0
Page 4 and 5:
FOREWORD PT / PG / PD REPAIR Namepl
Page 6 and 7:
FOREWORD PT / PG / PD REPAIR Item N
Page 8 and 9:
1 GENERAL PT / PG / PD REPAIR 1.1 S
Page 10 and 11:
1 GENERAL PT / PG / PD REPAIR 1.7 O
Page 12 and 13:
1 GENERAL PT / PG / PD REPAIR 1.10
Page 14 and 15:
Page 16 and 17:
Page 18 and 19:
Page 20 and 21:
Page 22 and 23:
Page 24 and 25:
Page 26 and 27:
2 OPERATION PT / PG / PD REPAIR 2.1
Page 28 and 29:
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
Page 36 and 37:
Page 38 and 39:
3 PT SERIES PUMPS PT / PG / PD REPA
Page 40 and 41:
Page 42 and 43:
Page 44 and 45:
Page 46 and 47:
Page 48 and 49:
Page 50 and 51: 3 PT SERIES PUMPS PT / PG / PD REPA
Page 72 and 73: 4 PG SERIES PUMPS PT / PG / PD REPA
Page 90 and 91: 5 PD SERIES PUMPS PT / PG / PD REPA
Page 112: TORQUE VALUES Metric Fasteners (DIN
show all

3 - Wacker Neuson Group

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?