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All Journal Prosiding Seminar Nasional Teknologi Industri Berkelanjutan
yuni sudarwanto
Institut Teknologi Indonesia
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Evaluation of E2 Mode Configuration on Komatsu HD785-7 Dump Trucks for Improving Fuel Efficiency in Downhill Haulage Operations yuni sudarwanto; Rulyenzi Rasyid; Miftahul Fadillah
Prosiding SENASTITAN: Seminar Nasional Teknologi Industri Berkelanjutan Prosiding SENASTITAN Vol. 06 2026
Publisher : Institut Teknologi Adhi Tama Surabaya

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Abstract

Fuel consumption by dump trucks is a major contributor to operating costs and emissions in open-pit mining. This study evaluates the change in hourly fuel consumption associated with implementing E2 Mode on Komatsu HD785-7 dump trucks assigned to haul routes dominated by loaded-downhill travel at a mining contractor in East Kalimantan, Indonesia. A quantitative before-and-after quasi-experimental design was used. The study included the entire population of 24 trucks through total sampling. The pre-implementation period covered Month 1–Month 3 under E3 Mode, whereas the post-implementation period covered Month 4–Month 12 under E2 Mode. One operating-mode average was calculated for each truck, producing 24 paired fuel-consumption observations. The paired differences were analyzed using the Shapiro–Wilk test and a two-tailed paired-samples t-test at a 5% significance level. Average fuel consumption decreased from 68.0 to 60.0 L/h, a reduction of 8.0 L/h or 11.76%, t(23) = −28.132, p 0.001, 95% CI [−8.588, −7.412]. Descriptively, productivity increased from 333 to 338 BCM/h, while cycle time changed only slightly from 18.302 to 18.403 min/cycle. Payload, haul distance, average speed, and average monthly operating hours per truck also remained broadly comparable. Because inferential tests were not available for these operational indicators and the study had unequal periods with no concurrent control group, the result should be interpreted as a strong association under the evaluated conditions rather than definitive causal evidence.Keywords: E2 Mode, fuel efficiency, Komatsu HD785-7, downhill haulage, mining dump truck. 
Co-Authors Miftahul Fadillah Rulyenzi Rasyid