YANMAR YDP Air Cooled Diesel PUMP Series Full Service & Repair Manual

YDP20N YDP20TN YDP20DN YDP20STN YDP30N YDP30TN YDP30DN YDP30STN YDP40N YDP40TN YDP40TN-E YDP40STN YDP40STN-E Air cooled diesel pumps SERVICE MANUAL

This Service Manual describes the proper procedure for disassembly, reassembly and servicing for YANMAR PUMP YDP series, Centrifugal pump, Semi-trash pump, Trash pump, and Diaphragm pump with air-cooled diesel engine and also gives guidance for routine servicing. It is hoped that this manual will help Yanmar pump servicemen become fully acquainted with the product, and thereby enhance their service activities. For disassembly, reassembly and servicing of the engines, refer to the L-series Service Manual (publication No. 0BLN0-G00100).

CONTENTS YDP series Centrifugal Pump, Semi-Trash and Trash Pump 1. Speciﬁcations ........................................................ 1 2. Pump performance .................................................... 3 3. Exploded view ........................................................ 4 4. Service information ................................................... 7 4-1. General safety .................................................. 7 4-2. Engine serial number and pump lot number location .................. 7 4-3. Service rules ................................................... 7 4-4. Tools.......................................................... 8 4-5. Tightening torque ............................................... 9 4-6. Maintenance schedule .......................................... 10 5. Disassembly and reassembly .......................................... 11 6. Checking and servicing ............................................... 15 7. Test run ............................................................ 17 8. Troubleshooting ..................................................... 18 Appendix 1. Technical material ........................................... 19 Diaphragm Pump: YDP20DN and YDP30DN 1. Speciﬁcations ....................................................... 22 2. Pump performance ................................................... 23 3. Exploded view ....................................................... 24 4. Service information .................................................. 25 4-1. General safety ................................................. 25 4-2. Engine serial number and pump lot number location ................. 25 4-3. Service rules .................................................. 25 4-4. Tools......................................................... 26 4-5. Tightening torque .............................................. 26 4-6. Maintenance schedule .......................................... 27 5. Disassembly and reassembly .......................................... 28 6. Checking and servicing ............................................... 30 7. Test run ............................................................ 31 8. Troubleshooting ..................................................... 32

– 1 – 1. Speciﬁcations Model YDP20N YDP30N YDP40N YDP20STN YDP30STN Application Freshwater Semi trash Set Dimension Overall length mm 530 630 515 Overall width mm 435 430 Overall height mm 637 727 490 Dray weight kg 40 42 59 39 40 Fuel tank capacity Full capacity lit. 5.5 2.4 Effective capacity lit. 5.0 1.9 Batttery capacity Ah – – – – – Pump Model Self-suction type Self-suction type Diameter Suction port mm 50 80 100 50 80 Discharge port mm 50 80 100 50 80 Max. Capacity lit./ min. 550 900 1300 550 850 Total head m 32 28 26.5 22.5 23 Revolution min -1 3600 3600 Engine Model – L48N6-PY L70N6-PY L48N6-PYST Type – 4-stroke vertical water cooled diesel engine Combustion system – Direct injection type Stroke capacity lit. 0.219 0.32 0.219 Output Max. kW 3.5 4.9 3.5 Rated 3.1 4.4 3.1 Cooling system – Forced air cooled type Lubricating system – Forced lubrication type Starting system – Recoil Recoil Stopping system – Fuel cutting type Speed control system – Centrifugal type Fuel – Diesel fuel (JIS Grade 2) Lube oil – EPI Grade CD or above Balancer shaft – With primary balancer Lube oil capacity Full capacity lit. 0.8 1.05 0.8 Effective capacity lit. 0.25 0.4 0.25 Air cleaner – Filter paper method Exhaust silencer – Expansion model Recharging system – – – – – – Note: Exist on the latter half for diaphragm pump only 1. Speciﬁcations

– 2 – 1. Speciﬁcations Model YDP40STN (-E YDP20TN YDP30TN YDP40TN (-E Application Semi trash Trash Set Dimension Overall length mm 678 580 680 718 Overall width mm 530 435 484 484 Overall height mm 600 620 715 740 Dray weight kg 56 (62) 56 72 109 (119) Fuel tank capacity Full capacity lit. 3.3 5.5 13.0 Effective capacity lit. 2.7 5.0 12.5 Batttery capacity Ah – – – – Pump Model Self-suction type Self-suction type Diameter Suction port mm 100 50 80 100 Discharge port mm 100 50 80 100 Max. Capacity lit./ min. 1300 550 1150 1750 Total head m 25 24 27 25 Revolution min -1 3600 3600 Engine Model – L70N6-P(E)YST L48N6-PYT L70N6-PYT L100N6-P (E)YT Type – 4-stroke vertical water cooled diesel engine Combustion system – Direct injection type Stroke capacity lit. 0.32 0.219 0.320 0.435 Output Max. kW 4.9 3.5 4.9 7.4 Rated 4.4 3.1 4.4 6.6 Cooling system – Forced air cooled type Lubricating system – Forced lubrication type Starting system – Recoil Recoil Stopping system – Fuel cutting type Speed control system – Centrifugal type Fuel – Diesel fuel (JIS Grade 2) Lube oil – EPI Grade CD or above Balancer shaft – With primary balancer Lube oil capacity Full capacity lit. 1.05 0.8 1.05 1.6 Effective capacity lit. 0.4 0.25 0.4 0.6 Air cleaner – Filter paper method Exhaust silencer – Expansion model Recharging system – – Dynamo type – – – Dynamo type Note: Exist on the latter half for diaphragm pump only

– 3 – 2. Pump performance 2. Pump performance 40 30 20 10 0 0 Discharge capacity (liter/min) Total head (m) YDP20N YDP30N YDP40N 500 1000 1500 YDP20STN YDP30STN YDP40STN 40 30 20 10 0 Total head (m) 0 Discharge capacity (liter/min) 500 1000 1500 0 10 20 30 0 500 1000 1500 2000 Discharge capacity (liter/min) Total head (m) YDP20TN YDP30TN YDP40TN Semi-trash pump : YDP20STN, 30STN and 40STN Trash pump : YDP20TN, 30TN and 40TN Centrifugal pump : YDP20N, 30N and 40N

– 4 – 3. Exploded view Centrifugal pump : YDP20N, YDP30N 3. Exploded view

– 5 – 3. Exploded view Semi-trash pump : YDP20STN, 30STN and 40STN

– 6 – 3. Exploded view Trash pump : YDP20TN, 30TN and 40TN

– 7 – 4. Service information 4. Service information 4-1. General safety 4-2. Engine serial number and pump lot number location 4-3. Service rules

YANMAR YDP Air Cooled Diesel PUMP Series Full Service & Repair Manual

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