Caterpillar Performance Handbook, January 2017, SEBD0351-47

WorkingWeights ● Bucket Fill Factors ● Bucket & Payload

Hydraulic Excavators

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 soil char- acteristics, i.e., the fill factor for that soil. Fill factors for several types of material are listed below. Average Bucket Payload = (Heaped Bucket Capacity) × (Bucket Fill Factor)

WorkingWeights — Bucket & Payload The following tables give maximum “bucket plus payload” weights to assist in selecting the correct bucket for a specific application. These weights are based on actual job conditions. In better than average conditions the excavator may be able to achieve rated lift capacities listed in this section. NOTE: Bucket sizes are suitable for a maximum mate- rial density of 1800 kg/m 3 (3035 lb/yd 3 ). Payloads shown are calculated at 1500 kg/m 3 (2530 lb/yd 3 ).

Fill Factor Range (Percent of heaped bucket capacity)

Material

Moist Loam or Sandy Clay Sand and Gravel Hard,Tough Clay Rock —Well Blasted Rock — Poorly Blasted

A — 100-110% B — 95-110% C — 80-90%

60-75% 40-50%

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