This assignment is to estimate the productivity of a backhoe excavator. All you need is to follow the steps below and answer each of the question. There is no need for you to refer to the PPT slides for this HW. Simply follow the steps and type your answer under each step.
Situation: As a construction manager, you're supposed to estimate how much work can be done in an hour when a backhoe that is currently available is used for a specific job. The backhoe information is as follows:
Model: CAT 349F L XE
Bucket Type: TB family, Pin-On, General Duty High Capacity
Material Type: Hard tough clay
Step 1: The first step is to fill the fill factor of the soil given. Refer to the CAT handbook (pg. 7-238) and find the fill factor range. Its a similar way we learned in the Loaders topic.
Step 2: For the given CAT model, find the bucket's heaped capacity. Refer to the CAT handbook (pg. 7-8 to 7-45 or 7-209). Use the max capacity within the range.
Step 3: Based on the fill factor and the heaped capacity, calculate the average bucket payload. Refer to CAT handbook pg. 7-238 for the formula. Apply the average bucket fill factor.
Step 4: Find the total cycle time of the machine. Refer to the Cycle Time Estimating Chart in the CAT handbook (pg. 7-279)
Step 5: Calculate the production rate (LCY/hr) given the information above. Use the operational efficiency of 45 minutes per hour. Note that the production rate is simply (Volume / Cycle time) x Operational efficiency.
Step 6: Convert the LCY to BCY given a load factor of 0.85. What is the final production rate in BCY/hr?
Hydraulic Excavators Working Weights Bucket Fill Factors Bucket & Payload BUCKET PAYLOAD An excavator's bucket payload (actual amount of material in the bucket on each digging cycle) is dependent on bucket size, shape, curl force, and certain soal char- acteristics ie, the fill factor for that soil. Fill factors for several types of material are listed below Average Bucket Payload (Heaped Bucket Capacity) x (Bucket Fill Factor) Working Weights - Bucket & Payload The following tables give maximum "bucket plus paslad weights to assist in selecting the correct bucker for a specific application. These weights are based on achal job conditions. In better than a seruge conditions the creator may be able to achieve rated lift capacities listed in this section NOTE: Bucket sizes are suitable for a maximum mate- nal density of 1800 kg/m' (3035 l/yd'). Payloads shown are calculated at 1500 kg/m (25301byd) Material Meist Loam or Sandy Clay Sand and Gravel Hard. Tough Clay Rock - Well Blasted Rock - Poorly Blastod FinFactor Range Percent of heaped bucket capacity A-100-110 95-1105 C-80-90% 50-75% 7-238 Edition 46 Specifications Hydraulic Excavators 18 pm MODEL 349F L-FIX 349FIXE 352F-VG Region Offerings North America North America North America Engine Power ISO 9249 295 W 396 hp 304 kW 408hp 295 kW 396 hp SAE J1349 N/A 304 kW 408hp NA Operating Weight 48 650 107,200 51 700 kg 114,000 lb SO 900 112,200 53 300 kg 112500 lb 53 300 kg 117.500 Bucket Capacity Range theaped 088-3.82 m 1.15-50 ye 0.88-3.82 m 1.15-5.00 y 0.83-3.82 1155.0 y Engine Model C13 ACERT C13 ACERT C13 ACERT Emission Standards Tier 4 Final/Stage IV Tier 4 Final/Stage IV Tier 4 Final/Stage IV Japan 2014 (Tier 4 Final Japan 2014 (Tier 4 Final) Japan 2014 (Tier 4 Final Rated Engine RPM 1800 1800 No. of Cylinders Bore 130 mm 5.1" Stroke 157 mm 62" Displacement 12.5L 763 in 12.5L 763 in 12.5 763 in Max Implement Hydraulic Pump Output at Rated RPM 2 x 38 min 2 x 102 pm 750 min 238 min 2x 102 pm Relief Valve Settings Implement Circuits 35 000 MPa 5076 psi 35 000 Pa 5080p 25 000 5078 Travel Circuits 35 000 kPa 5076 psi 35 000 PM 5080p 35 000 5075psi Swing Circuits 27 500 PM 3909 psi 27500 3990 poi 27500 P 30 pl Pilot Circuits 4120 PS 500 pal 3120 PM 50psi 4120P Spai Maximum Drawbar Punt 335 IN 75,300 335 N 75,300 355 IN 75.00 Two Speed Travel Two Speed Travel Two Speed Travel Maximum Travel Speed at Rated RPM Loc 3.7 kmh 2) mph Lo: 2.9 kmh 18 mph Lee 2.7 2.3 mph Hi: 4.7 kmh 29 mph Hit: 4.7 km 29 mph Heimh 29 mph Width of Standard Track Shoe 900 mm 29" 900 mm 35 900 mm Overall Track Length 5370 mm 5370 mm 177" Ground Contact Area with Std. Shoe 8.48 ml 13.140 In 789 m 12.230 in 13.100 in Track Gauge 2700 mm 90 2740 mm 90- Fuel Tank Refill Capacity 720 L 190 U.S.gal 720 L 190 U.S.gal 720 130 US gal Hydraulic System (includes tank) 570 L 1506 U.S.gal 570L 151 U.S.gal 570L 150.5US gal Hydraulic Tank 407L 1075 US.gal 1025 US gal Opening weight includes coolant, lubricants, full fuel tank standard shoes, bucket and operator 15 kg (185 NOTE Curtain models may not be available in alles was Specification also vary by Sales Contact your Calder for details 177 Edition 46 7-43 Cycle Time Estimating Charts Hydraulic Excavators 3150L 520 0.68 3190 L 319D UN 800 1.05 M3130 610 0.80 M3220 1050 1.37 . Cycle Time Estimating Chart 30RE2 Model CR SB Bucket Size L 220 yd! 0.30 Soil Type Digging Depth 13 60" Load Bucket 0.08 Swing Loaded min 0.03 Dump Bucket min 0.03 Swing Empty 0.08 Total Cycle Time min 0.22 E 3120 3110 LRR 3120 L 450 520 0.59 0.68 Packed Earth 1.5 18 5'0" 0.07 0.06 0.06 0.03 0.03 0.05 0.21 0.21 min 3.0 100 0.07 0.08 0.03 0.06 0.24 0.07 M3150 M316D M3180 750 900 0.98 1.18 Sand/Gravel 3.0 30 100- 10'0" 0.06 0.06 0.05 0.06 0.03 0.03 0.04 0.05 0.18 0.20 3.0 100 0.09 0.00 0.03 0.07 0.28 3.0 100 0.05 0.05 0.03 0.04 0.17 30 100 0.08 0.00 0.04 min 0.05 0.05 0.23 7 Cycle Time Estimating Chart Model Bucket Size 320D RR 321D CR 323D2 800 105 32002 800 1.05 3240 1000 1.31 328D LCR NA L Yd 3230 1100 1.44 Hard Clay 34902 349E. 349F 2400 3.0 3360 1400 1.83 365CL 1900 25 385C 3750 5.0 Soil Type Digging Depth 3.2 NIA m ft 3.4 11 10 min 0.09 0.09 4.0 13 0.13 0.07 23 8 0.09 0.00 0.03 0.05 0.23 Load Bucket Swing Loaded Dump Bucket Swing Empty Total Cycle Time NA Not Applicatie 2.3 8 0.09 0.00 0.03 0.05 0.23 min min min min 32 13 0.09 0.06 0.04 0.06 0.25 NA NA NA NIA NA 0.06 0.04 0.06 0.25 0.02 42 14 0.10 0.09 0.04 0.02 0.30 0.07 0.04 0.07 0.27 5.6 18 0.19 0.00 0.03 0.07 0.35 0.06 0.28 Edition 46 7-279 Buckets Americas North Hydraulic Excavators Model IGE 336F 3490 349F Width Capacity Weight Range Range Range GET mm in m kg 750-1850 30-740.35-3.08 1.24-4.00 1275-2170 2811-4734 K110 2000 3.82 5.00 2373 5232 K110 900-1950 36-78135-3.41 177-4.46 1457-2420 3212-5335 110 900-1800 36-72-08-269 141-3.52 1546-2339 3409-5156 K110 K110 750-1850 3074 088-2.69 1.15-3.52 1410-2612 3109-5759K130 1250-1400 49-55 160-187 209-2.44 2148-2290 4735-5048 K130 1200-1850 48-74 149-256 1.95-3.34 1870-2501 4122-5514 K10 349E 349F 3740 374F 1650-1950 65-772.77-3.43 3.62-448 2486-2803 5481-6180 K130 1450-1850 58-73 239-3.21 3.13-4.20 2454-2892 5432-6375 K 130 1900 25 3.80 5.00 3565 7859 K150 7 Bucket Family Interface Bucket Type TB Pin-On General Duty Pin Grabber General Duty High Capacity General Duty Wide Tip Heavy Duty Severe Duty Extreme Duty Center-Lock Heavy Duty Pin Grabber Performance UB Pin-On Heavy Duty Pin Grabbar Severe Duty VB2 Pin-On General Duty Pin Grabber General Duty High Capacity Heavy Duty Severe Duty Extreme Duty WE2 Pin-On Severe Duty Pin Grabber Extreme Duty HB2 Pin-Ow General Duty Pin Grabber General Duty High Capacity Severe Duty JC Pin-On General Duty Pin Grabber General Duty High Capacity Severe Duty Extreme Duty 1900 3740 374F 3900 390F 2000 79 4.60 6.00 3922 8646 K150 1220-1900 48-75 220-3.80 2.90-5.00 2799-3728 6170-8214K150 1100-1300 43-75190-3.30 2.50-5.00 2747-3061 SOSG-6512 K150 75 3.80 5.00 2082 10.322 K150 1900-2000 75-79 4.00 4.40 5.25-5.75 1661-4818 10.276 K170 90.622 2000-2100 79-83 4.40-4.50 5.70-6.00 5787-6000 12.758 K170 13,360 1350-1900 54-75 3.00-460 4.00-6.00 3282-4000 7236-8818 K150 2000 79 5.30 200 4245 9359 K150 1100-1910 43-75230-4.50 3.00-6.00 3189-4398 7030-9696 K150 2300-2420 91-95 5.70-8.00 740-7.90 5576-5758 12,283 K170 12,694 101 6.50 8.50 5992 13.210 K170 1960-240 77-964.60-6.00 6.00-790 5858-6878 12.915- 800 15,163 2010 5.00 7353-7455 16,221 3800 16.435 3900 390F 2575 Edition 46 7-209 Hydraulic Excavators Working Weights Bucket Fill Factors Bucket & Payload BUCKET PAYLOAD An excavator's bucket payload (actual amount of material in the bucket on each digging cycle) is dependent on bucket size, shape, curl force, and certain soal char- acteristics ie, the fill factor for that soil. Fill factors for several types of material are listed below Average Bucket Payload (Heaped Bucket Capacity) x (Bucket Fill Factor) Working Weights - Bucket & Payload The following tables give maximum "bucket plus paslad weights to assist in selecting the correct bucker for a specific application. These weights are based on achal job conditions. In better than a seruge conditions the creator may be able to achieve rated lift capacities listed in this section NOTE: Bucket sizes are suitable for a maximum mate- nal density of 1800 kg/m' (3035 l/yd'). Payloads shown are calculated at 1500 kg/m (25301byd) Material Meist Loam or Sandy Clay Sand and Gravel Hard. Tough Clay Rock - Well Blasted Rock - Poorly Blastod FinFactor Range Percent of heaped bucket capacity A-100-110 95-1105 C-80-90% 50-75% 7-238 Edition 46 Specifications Hydraulic Excavators 18 pm MODEL 349F L-FIX 349FIXE 352F-VG Region Offerings North America North America North America Engine Power ISO 9249 295 W 396 hp 304 kW 408hp 295 kW 396 hp SAE J1349 N/A 304 kW 408hp NA Operating Weight 48 650 107,200 51 700 kg 114,000 lb SO 900 112,200 53 300 kg 112500 lb 53 300 kg 117.500 Bucket Capacity Range theaped 088-3.82 m 1.15-50 ye 0.88-3.82 m 1.15-5.00 y 0.83-3.82 1155.0 y Engine Model C13 ACERT C13 ACERT C13 ACERT Emission Standards Tier 4 Final/Stage IV Tier 4 Final/Stage IV Tier 4 Final/Stage IV Japan 2014 (Tier 4 Final Japan 2014 (Tier 4 Final) Japan 2014 (Tier 4 Final Rated Engine RPM 1800 1800 No. of Cylinders Bore 130 mm 5.1" Stroke 157 mm 62" Displacement 12.5L 763 in 12.5L 763 in 12.5 763 in Max Implement Hydraulic Pump Output at Rated RPM 2 x 38 min 2 x 102 pm 750 min 238 min 2x 102 pm Relief Valve Settings Implement Circuits 35 000 MPa 5076 psi 35 000 Pa 5080p 25 000 5078 Travel Circuits 35 000 kPa 5076 psi 35 000 PM 5080p 35 000 5075psi Swing Circuits 27 500 PM 3909 psi 27500 3990 poi 27500 P 30 pl Pilot Circuits 4120 PS 500 pal 3120 PM 50psi 4120P Spai Maximum Drawbar Punt 335 IN 75,300 335 N 75,300 355 IN 75.00 Two Speed Travel Two Speed Travel Two Speed Travel Maximum Travel Speed at Rated RPM Loc 3.7 kmh 2) mph Lo: 2.9 kmh 18 mph Lee 2.7 2.3 mph Hi: 4.7 kmh 29 mph Hit: 4.7 km 29 mph Heimh 29 mph Width of Standard Track Shoe 900 mm 29" 900 mm 35 900 mm Overall Track Length 5370 mm 5370 mm 177" Ground Contact Area with Std. Shoe 8.48 ml 13.140 In 789 m 12.230 in 13.100 in Track Gauge 2700 mm 90 2740 mm 90- Fuel Tank Refill Capacity 720 L 190 U.S.gal 720 L 190 U.S.gal 720 130 US gal Hydraulic System (includes tank) 570 L 1506 U.S.gal 570L 151 U.S.gal 570L 150.5US gal Hydraulic Tank 407L 1075 US.gal 1025 US gal Opening weight includes coolant, lubricants, full fuel tank standard shoes, bucket and operator 15 kg (185 NOTE Curtain models may not be available in alles was Specification also vary by Sales Contact your Calder for details 177 Edition 46 7-43 Cycle Time Estimating Charts Hydraulic Excavators 3150L 520 0.68 3190 L 319D UN 800 1.05 M3130 610 0.80 M3220 1050 1.37 . Cycle Time Estimating Chart 30RE2 Model CR SB Bucket Size L 220 yd! 0.30 Soil Type Digging Depth 13 60" Load Bucket 0.08 Swing Loaded min 0.03 Dump Bucket min 0.03 Swing Empty 0.08 Total Cycle Time min 0.22 E 3120 3110 LRR 3120 L 450 520 0.59 0.68 Packed Earth 1.5 18 5'0" 0.07 0.06 0.06 0.03 0.03 0.05 0.21 0.21 min 3.0 100 0.07 0.08 0.03 0.06 0.24 0.07 M3150 M316D M3180 750 900 0.98 1.18 Sand/Gravel 3.0 30 100- 10'0" 0.06 0.06 0.05 0.06 0.03 0.03 0.04 0.05 0.18 0.20 3.0 100 0.09 0.00 0.03 0.07 0.28 3.0 100 0.05 0.05 0.03 0.04 0.17 30 100 0.08 0.00 0.04 min 0.05 0.05 0.23 7 Cycle Time Estimating Chart Model Bucket Size 320D RR 321D CR 323D2 800 105 32002 800 1.05 3240 1000 1.31 328D LCR NA L Yd 3230 1100 1.44 Hard Clay 34902 349E. 349F 2400 3.0 3360 1400 1.83 365CL 1900 25 385C 3750 5.0 Soil Type Digging Depth 3.2 NIA m ft 3.4 11 10 min 0.09 0.09 4.0 13 0.13 0.07 23 8 0.09 0.00 0.03 0.05 0.23 Load Bucket Swing Loaded Dump Bucket Swing Empty Total Cycle Time NA Not Applicatie 2.3 8 0.09 0.00 0.03 0.05 0.23 min min min min 32 13 0.09 0.06 0.04 0.06 0.25 NA NA NA NIA NA 0.06 0.04 0.06 0.25 0.02 42 14 0.10 0.09 0.04 0.02 0.30 0.07 0.04 0.07 0.27 5.6 18 0.19 0.00 0.03 0.07 0.35 0.06 0.28 Edition 46 7-279 Buckets Americas North Hydraulic Excavators Model IGE 336F 3490 349F Width Capacity Weight Range Range Range GET mm in m kg 750-1850 30-740.35-3.08 1.24-4.00 1275-2170 2811-4734 K110 2000 3.82 5.00 2373 5232 K110 900-1950 36-78135-3.41 177-4.46 1457-2420 3212-5335 110 900-1800 36-72-08-269 141-3.52 1546-2339 3409-5156 K110 K110 750-1850 3074 088-2.69 1.15-3.52 1410-2612 3109-5759K130 1250-1400 49-55 160-187 209-2.44 2148-2290 4735-5048 K130 1200-1850 48-74 149-256 1.95-3.34 1870-2501 4122-5514 K10 349E 349F 3740 374F 1650-1950 65-772.77-3.43 3.62-448 2486-2803 5481-6180 K130 1450-1850 58-73 239-3.21 3.13-4.20 2454-2892 5432-6375 K 130 1900 25 3.80 5.00 3565 7859 K150 7 Bucket Family Interface Bucket Type TB Pin-On General Duty Pin Grabber General Duty High Capacity General Duty Wide Tip Heavy Duty Severe Duty Extreme Duty Center-Lock Heavy Duty Pin Grabber Performance UB Pin-On Heavy Duty Pin Grabbar Severe Duty VB2 Pin-On General Duty Pin Grabber General Duty High Capacity Heavy Duty Severe Duty Extreme Duty WE2 Pin-On Severe Duty Pin Grabber Extreme Duty HB2 Pin-Ow General Duty Pin Grabber General Duty High Capacity Severe Duty JC Pin-On General Duty Pin Grabber General Duty High Capacity Severe Duty Extreme Duty 1900 3740 374F 3900 390F 2000 79 4.60 6.00 3922 8646 K150 1220-1900 48-75 220-3.80 2.90-5.00 2799-3728 6170-8214K150 1100-1300 43-75190-3.30 2.50-5.00 2747-3061 SOSG-6512 K150 75 3.80 5.00 2082 10.322 K150 1900-2000 75-79 4.00 4.40 5.25-5.75 1661-4818 10.276 K170 90.622 2000-2100 79-83 4.40-4.50 5.70-6.00 5787-6000 12.758 K170 13,360 1350-1900 54-75 3.00-460 4.00-6.00 3282-4000 7236-8818 K150 2000 79 5.30 200 4245 9359 K150 1100-1910 43-75230-4.50 3.00-6.00 3189-4398 7030-9696 K150 2300-2420 91-95 5.70-8.00 740-7.90 5576-5758 12,283 K170 12,694 101 6.50 8.50 5992 13.210 K170 1960-240 77-964.60-6.00 6.00-790 5858-6878 12.915- 800 15,163 2010 5.00 7353-7455 16,221 3800 16.435 3900 390F 2575 Edition 46 7-209
