588 / 2440
Hydraulic
Excavators
7
Edition 47 7-259
Trenching Production
(get loose volume from scale E and enter on this page
scale E)
5) Enter required linear production rate 9 m/h (30 t/hr)
on scale G.
6) Connect E and G. Transfer hourly production rate
from scale F to scale K (next page).
7) Estimate cycle time (23 sec) based on anticipated
conditions and enter on scale H.
8) Estimate hourly digging time (27 min) and enter on
scale I.
9) Connect H through I to scale J for cycles per hour.
E
LOOSE
VOLUME
LCM/m
LCY/ft
F
HOURLY
PRODUCTION
LCM/m
LCY/ft
G
LINEAR
PRODUCTION
m/h
ft/hr
H
CYCLETIME
100’s
of min
Sec
I
DIGGING
TIME/HR.
J
CYCLES
PER
HOUR
% of
Hour
%
Digging
time/hr
min
Cycles/hr